Merge branch 'main' into ash/react-19-again

.github/workflows/pr-e2e-tests.yml

@@ -192,6 +192,30 @@ jobs:
            -f "output[summary]=${IMAGE}" \
            -f "output[text]=${IMAGE}"
 
+  # TODO remove this when delivering
+  # This will push the temporary docker image to dockerhub
+  push-docker-image-to-dockerhub:
+    if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == false
+    permissions:
+      contents: read
+      id-token: write
+    runs-on: ubuntu-latest
+    needs:
+      - build-grafana
+    steps:
+      - uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53
+        with:
+          name: grafana-docker-tar-gz
+          path: .
+      - uses: grafana/shared-workflows/actions/dockerhub-login@dockerhub-login/v1.0.2
+      - name: Load & Push Docker image
+        run: |
+          set -euo pipefail
+          LOADED_IMAGE_NAME=$(docker load -i grafana.docker.tar.gz | sed 's/Loaded image: //g')
+          DOCKER_IMAGE="grafana/grafana:12.4.0-react19"
+          docker tag "${LOADED_IMAGE_NAME}" "${DOCKER_IMAGE}"
+          docker push "${DOCKER_IMAGE}"
+
   run-e2e-tests:
     needs:
       - build-grafana

e2e-playwright/test-plugins/grafana-extensionstest-app/package.json

@@ -16,8 +16,8 @@
     "@types/lodash": "4.17.7",
     "@types/node": "24.9.2",
     "@types/prismjs": "1.26.4",
-    "@types/react": "18.3.18",
-    "@types/react-dom": "18.3.5",
+    "@types/react": "19.2.7",
+    "@types/react-dom": "19.2.3",
     "@types/semver": "7.5.8",
     "@types/uuid": "9.0.8",
     "glob": "10.5.0",
@@ -37,8 +37,8 @@
     "@grafana/runtime": "workspace:*",
     "@grafana/schema": "workspace:*",
     "@grafana/ui": "workspace:*",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
+    "react": "19.2.0",
+    "react-dom": "19.2.0",
     "react-router-dom": "^6.22.0",
     "rxjs": "7.8.1",
     "tslib": "2.6.3"

e2e-playwright/test-plugins/grafana-test-datasource/package.json

@@ -16,8 +16,8 @@
     "@types/lodash": "4.17.7",
     "@types/node": "24.9.2",
     "@types/prismjs": "1.26.4",
-    "@types/react": "18.3.18",
-    "@types/react-dom": "18.3.5",
+    "@types/react": "19.2.7",
+    "@types/react-dom": "19.2.3",
     "@types/semver": "7.5.8",
     "@types/uuid": "9.0.8",
     "glob": "10.4.1",
@@ -37,8 +37,8 @@
     "@grafana/runtime": "workspace:*",
     "@grafana/schema": "workspace:*",
     "@grafana/ui": "workspace:*",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
+    "react": "19.2.0",
+    "react-dom": "19.2.0",
     "react-router-dom": "^6.22.0",
     "rxjs": "7.8.1",
     "tslib": "2.6.3"

package.json

@@ -140,8 +140,8 @@
     "@types/ol-ext": "npm:@siedlerchr/types-ol-ext@3.3.0",
     "@types/pluralize": "^0.0.33",
     "@types/prismjs": "1.26.5",
-    "@types/react": "18.3.18",
-    "@types/react-dom": "18.3.5",
+    "@types/react": "19.2.7",
+    "@types/react-dom": "19.2.3",
     "@types/react-grid-layout": "1.3.5",
     "@types/react-highlight-words": "0.20.0",
     "@types/react-resizable": "3.0.8",
@@ -239,7 +239,7 @@
     "prettier": "3.6.2",
     "prom-client": "^15.1.3",
     "publint": "^0.3.12",
-    "react-refresh": "0.14.0",
+    "react-refresh": "0.18.0",
     "react-select-event": "5.5.1",
     "redux-mock-store": "1.5.5",
     "rimraf": "6.0.1",
@@ -388,9 +388,9 @@
     "pluralize": "^8.0.0",
     "prismjs": "1.30.0",
     "re-resizable": "6.11.2",
-    "react": "18.3.1",
+    "react": "19.2.1",
     "react-diff-viewer-continued": "^3.4.0",
-    "react-dom": "18.3.1",
+    "react-dom": "19.2.1",
     "react-draggable": "4.5.0",
     "react-dropzone": "^14.2.3",
     "react-grid-layout": "patch:react-grid-layout@npm%3A1.4.4#~/.yarn/patches/react-grid-layout-npm-1.4.4-4024c5395b.patch",
@@ -460,7 +460,10 @@
     "tmp@npm:^0.0.33": "~0.2.1",
     "js-yaml@npm:4.1.0": "^4.1.0",
     "js-yaml@npm:=4.1.0": "^4.1.0",
-    "nodemailer": "7.0.7"
+    "nodemailer": "7.0.7",
+    "pretty-format/react-is": "19.0.0",
+    "react": "19.2.1",
+    "react-dom": "19.2.1"
   },
   "workspaces": {
     "packages": [

packages/grafana-alerting/package.json

@@ -68,13 +68,13 @@
     "@testing-library/react": "^16.3.0",
     "@testing-library/user-event": "^14.6.1",
     "@types/lodash": "^4",
-    "@types/react": "18.3.18",
-    "@types/react-dom": "18.3.5",
+    "@types/react": "19.2.7",
+    "@types/react-dom": "19.2.3",
     "@types/tinycolor2": "^1",
     "i18next": "^25.5.2",
     "i18next-cli": "^1.24.22",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
+    "react": "19.2.0",
+    "react-dom": "19.2.0",
     "react-redux": "^9.2.0",
     "rimraf": "^6.0.1",
     "rollup": "^4.22.4",

packages/grafana-data/package.json

@@ -92,12 +92,12 @@
     "@types/lodash": "4.17.20",
     "@types/node": "24.10.1",
     "@types/papaparse": "5.3.16",
-    "@types/react": "18.3.18",
-    "@types/react-dom": "18.3.5",
+    "@types/react": "19.2.7",
+    "@types/react-dom": "19.2.3",
     "@types/tinycolor2": "1.4.6",
     "esbuild": "0.25.8",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
+    "react": "19.2.0",
+    "react-dom": "19.2.0",
     "rimraf": "6.0.1",
     "rollup": "^4.22.4",
     "rollup-plugin-esbuild": "6.2.1",

packages/grafana-flamegraph/package.json

@@ -50,7 +50,7 @@
     "@leeoniya/ufuzzy": "1.0.19",
     "d3": "^7.8.5",
     "lodash": "4.17.21",
-    "react": "18.3.1",
+    "react": "19.2.0",
     "react-use": "17.6.0",
     "react-virtualized-auto-sizer": "1.0.26",
     "tinycolor2": "1.6.0",
@@ -73,7 +73,7 @@
     "@types/jest": "^29.5.4",
     "@types/lodash": "4.17.20",
     "@types/node": "24.10.1",
-    "@types/react": "18.3.18",
+    "@types/react": "19.2.7",
     "@types/react-virtualized-auto-sizer": "1.0.8",
     "@types/tinycolor2": "1.4.6",
     "babel-jest": "29.7.0",

packages/grafana-flamegraph/src/FlameGraph/rendering.ts

@@ -22,7 +22,7 @@ import { getBarColorByDiff, getBarColorByPackage, getBarColorByValue } from './c
 import { CollapseConfig, CollapsedMap, FlameGraphDataContainer, LevelItem } from './dataTransform';
 
 type RenderOptions = {
-  canvasRef: RefObject<HTMLCanvasElement>;
+  canvasRef: RefObject<HTMLCanvasElement | null>;
   data: FlameGraphDataContainer;
   root: LevelItem;
   direction: 'children' | 'parents';
@@ -373,7 +373,7 @@ function useColorFunction(
   );
 }
 
-function useSetupCanvas(canvasRef: RefObject<HTMLCanvasElement>, wrapperWidth: number, numberOfLevels: number) {
+function useSetupCanvas(canvasRef: RefObject<HTMLCanvasElement | null>, wrapperWidth: number, numberOfLevels: number) {
   const [ctx, setCtx] = useState<CanvasRenderingContext2D>();
 
   useEffect(() => {

packages/grafana-i18n/package.json

@@ -64,7 +64,7 @@
     "react-i18next": "^15.0.0"
   },
   "devDependencies": {
-    "@types/react": "18.3.18",
+    "@types/react": "19.2.7",
     "rollup": "^4.22.4",
     "rollup-plugin-copy": "3.5.0",
     "typescript": "5.9.2"

packages/grafana-o11y-ds-frontend/package.json

@@ -36,10 +36,10 @@
     "@testing-library/user-event": "14.6.1",
     "@types/jest": "^29.5.4",
     "@types/node": "24.10.1",
-    "@types/react": "18.3.18",
+    "@types/react": "19.2.7",
     "@types/systemjs": "6.15.3",
     "jest": "^29.6.4",
-    "react": "18.3.1",
+    "react": "19.2.0",
     "ts-jest": "29.4.0",
     "ts-node": "10.9.2",
     "typescript": "5.9.2"

packages/grafana-plugin-configs/jest/jest-setup.js

@@ -84,3 +84,19 @@ global.ResizeObserver = class ResizeObserver {
     this.#isObserving = false;
   }
 };
+
+global.MessageChannel = jest.fn().mockImplementation(() => {
+  let onmessage;
+  return {
+    port1: {
+      set onmessage(cb) {
+        onmessage = cb;
+      },
+    },
+    port2: {
+      postMessage: (data) => {
+        onmessage?.({ data });
+      },
+    },
+  };
+});

packages/grafana-plugin-configs/package.json

@@ -4,7 +4,7 @@
   "private": true,
   "version": "12.4.0-pre",
   "dependencies": {
-    "react": "18.3.1",
+    "react": "19.2.0",
     "terser-webpack-plugin": "5.3.14",
     "tslib": "2.8.1"
   },
@@ -15,7 +15,7 @@
     "@swc/helpers": "^0.5.0",
     "@swc/jest": "^0.2.26",
     "@types/eslint": "9.6.1",
-    "@types/react": "18.3.18",
+    "@types/react": "19.2.7",
     "@types/webpack-bundle-analyzer": "^4.7.0",
     "copy-webpack-plugin": "13.0.0",
     "eslint": "9.32.0",

packages/grafana-prometheus/package.json

@@ -57,8 +57,8 @@
     "@reduxjs/toolkit": "2.10.1",
     "@types/debounce-promise": "3.1.9",
     "@types/lodash": "4.17.20",
-    "@types/react": "18.3.18",
-    "@types/react-dom": "18.3.5",
+    "@types/react": "19.2.7",
+    "@types/react-dom": "19.2.3",
     "@types/react-highlight-words": "0.20.0",
     "@types/react-window": "1.8.8",
     "@types/semver": "7.7.1",
@@ -94,8 +94,8 @@
     "i18next-cli": "^1.24.22",
     "jest": "29.7.0",
     "jest-environment-jsdom": "29.7.0",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
+    "react": "19.2.0",
+    "react-dom": "19.2.0",
     "react-select-event": "5.5.1",
     "rimraf": "6.0.1",
     "rollup": "^4.22.4",

packages/grafana-prometheus/src/components/metrics-browser/useMetricsLabelsValues.ts

@@ -1,4 +1,5 @@
 import { useCallback, useEffect, useRef, useState, useMemo } from 'react';
+import { flushSync } from 'react-dom';
 import { useDebounce } from 'react-use';
 
 import { TimeRange } from '@grafana/data';
@@ -225,7 +226,10 @@ export const useMetricsLabelsValues = (timeRange: TimeRange, languageProvider: P
         newSelectedMetric === '' ? undefined : selector
       );
 
-      setMetrics(fetchedMetrics);
+      // TODO why?!
+      flushSync(() => {
+        setMetrics(fetchedMetrics);
+      });
       setSelectedMetric(newSelectedMetric);
       setLabelKeys(fetchedLabelKeys);
       setIsLoadingLabelKeys(false);

packages/grafana-prometheus/src/querybuilder/components/MetricsLabelsSection.test.tsx

@@ -99,7 +99,7 @@ describe('MetricsLabelsSection', () => {
         onBlur: onBlur,
         variableEditor: undefined,
       }),
-      expect.anything()
+      undefined
     );
   });
 
@@ -124,7 +124,7 @@ describe('MetricsLabelsSection', () => {
         labelsFilters: defaultQuery.labels,
         variableEditor: undefined,
       }),
-      expect.anything()
+      undefined
     );
   });
 

packages/grafana-runtime/package.json

@@ -78,12 +78,12 @@
     "@types/history": "4.7.11",
     "@types/jest": "29.5.14",
     "@types/lodash": "4.17.20",
-    "@types/react": "18.3.18",
-    "@types/react-dom": "18.3.5",
+    "@types/react": "19.2.7",
+    "@types/react-dom": "19.2.3",
     "esbuild": "0.25.8",
     "lodash": "4.17.21",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
+    "react": "19.2.0",
+    "react-dom": "19.2.0",
     "rimraf": "6.0.1",
     "rollup": "^4.22.4",
     "rollup-plugin-esbuild": "6.2.1",

packages/grafana-sql/package.json

@@ -25,8 +25,8 @@
     "@react-awesome-query-builder/ui": "6.6.15",
     "immutable": "5.1.4",
     "lodash": "4.17.21",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
+    "react": "19.2.0",
+    "react-dom": "19.2.0",
     "react-select": "5.10.2",
     "react-use": "17.6.0",
     "react-virtualized-auto-sizer": "1.0.26",
@@ -43,8 +43,8 @@
     "@types/jest": "^29.5.4",
     "@types/lodash": "4.17.20",
     "@types/node": "24.10.1",
-    "@types/react": "18.3.18",
-    "@types/react-dom": "18.3.5",
+    "@types/react": "19.2.7",
+    "@types/react-dom": "19.2.3",
     "@types/react-virtualized-auto-sizer": "1.0.8",
     "@types/systemjs": "6.15.3",
     "@types/uuid": "10.0.0",

packages/grafana-ui/package.json

@@ -75,6 +75,7 @@
     "@hello-pangea/dnd": "18.0.1",
     "@monaco-editor/react": "4.7.0",
     "@popperjs/core": "2.11.8",
+    "@rc-component/cascader": "1.9.0",
     "@rc-component/drawer": "1.3.0",
     "@rc-component/picker": "1.7.1",
     "@rc-component/slider": "1.0.1",
@@ -105,7 +106,6 @@
     "monaco-editor": "0.34.1",
     "ol": "10.7.0",
     "prismjs": "1.30.0",
-    "rc-cascader": "3.34.0",
     "react-calendar": "^6.0.0",
     "react-colorful": "5.6.1",
     "react-custom-scrollbars-2": "4.5.0",
@@ -167,9 +167,9 @@
     "@types/mock-raf": "1.0.6",
     "@types/node": "24.10.1",
     "@types/prismjs": "1.26.5",
-    "@types/react": "18.3.18",
+    "@types/react": "19.2.7",
     "@types/react-color": "3.0.13",
-    "@types/react-dom": "18.3.5",
+    "@types/react-dom": "19.2.3",
     "@types/react-highlight-words": "0.20.0",
     "@types/react-transition-group": "4.4.12",
     "@types/react-window": "1.8.8",
@@ -190,8 +190,8 @@
     "msw": "^2.10.2",
     "msw-storybook-addon": "^2.0.5",
     "process": "^0.11.10",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
+    "react": "19.2.0",
+    "react-dom": "19.2.0",
     "react-select-event": "^5.1.0",
     "rimraf": "6.0.1",
     "rollup": "^4.22.4",

packages/grafana-ui/src/components/ButtonCascader/ButtonCascader.tsx

@@ -1,5 +1,5 @@
 import { css, cx } from '@emotion/css';
-import RCCascader, { FieldNames } from 'rc-cascader';
+import RCCascader, { FieldNames } from '@rc-component/cascader';
 import * as React from 'react';
 
 import { GrafanaTheme2 } from '@grafana/data';
@@ -47,7 +47,7 @@ export const ButtonCascader = (props: ButtonCascaderProps) => {
     <RCCascader
       onChange={onChangeCascader(onChange)}
       loadData={onLoadDataCascader(loadData)}
-      dropdownClassName={cx(cascaderStyles.dropdown, styles.popup)}
+      popupClassName={cx(cascaderStyles.dropdown, styles.popup)}
       {...rest}
       expandIcon={null}
     >

packages/grafana-ui/src/components/Cascader/Cascader.tsx

@@ -1,6 +1,6 @@
 import { css } from '@emotion/css';
+import RCCascader from '@rc-component/cascader';
 import memoize from 'micro-memoize';
-import RCCascader from 'rc-cascader';
 import { PureComponent } from 'react';
 import * as React from 'react';
 
@@ -279,7 +279,7 @@ class UnthemedCascader extends PureComponent<CascaderProps, CascaderState> {
             expandIcon={null}
             open={this.props.alwaysOpen}
             disabled={disabled}
-            dropdownClassName={styles.dropdown}
+            popupClassName={styles.dropdown}
           >
             <div className={disableDivFocus}>
               <Input

packages/grafana-ui/src/components/Cascader/optionMappings.ts

@@ -1,4 +1,4 @@
-import { BaseOptionType as RCCascaderOption, CascaderProps } from 'rc-cascader';
+import { BaseOptionType as RCCascaderOption, CascaderProps } from '@rc-component/cascader';
 
 import { CascaderOption } from './Cascader';
 

packages/grafana-ui/src/components/Combobox/ComboboxList.tsx

@@ -18,7 +18,7 @@ interface ComboboxListProps<T extends string | number> {
   options: Array<ComboboxOption<T>>;
   highlightedIndex: number | null;
   selectedItems?: Array<ComboboxOption<T>>;
-  scrollRef: React.RefObject<HTMLDivElement>;
+  scrollRef: React.RefObject<HTMLDivElement | null>;
   getItemProps: UseComboboxPropGetters<ComboboxOption<T>>['getItemProps'];
   enableAllOption?: boolean;
   isMultiSelect?: boolean;

packages/grafana-ui/src/components/Combobox/useComboboxFloat.ts

@@ -1,5 +1,5 @@
 import { autoUpdate, autoPlacement, size, useFloating } from '@floating-ui/react';
-import { useMemo, useRef, useState } from 'react';
+import { CSSProperties, type RefObject, useMemo, useRef, useState } from 'react';
 
 import { BOUNDARY_ELEMENT_ID } from '../../utils/floating';
 import { measureText } from '../../utils/measureText';
@@ -21,7 +21,21 @@ const POPOVER_PADDING = 16;
 
 const SCROLL_CONTAINER_PADDING = 8;
 
-export const useComboboxFloat = (items: Array<ComboboxOption<string | number>>, isOpen: boolean) => {
+interface UseComboboxFloatReturn {
+  inputRef: RefObject<HTMLInputElement | null>;
+  floatingRef: RefObject<HTMLDivElement | null>;
+  scrollRef: RefObject<HTMLDivElement | null>;
+  floatStyles: CSSProperties & {
+    width: number;
+    maxWidth: number;
+    maxHeight: number;
+  };
+}
+
+export const useComboboxFloat = (
+  items: Array<ComboboxOption<string | number>>,
+  isOpen: boolean
+): UseComboboxFloatReturn => {
   const inputRef = useRef<HTMLInputElement>(null);
   const floatingRef = useRef<HTMLDivElement>(null);
   const scrollRef = useRef<HTMLDivElement>(null);

packages/grafana-ui/src/components/DataLinks/DataLinkSuggestions.tsx

@@ -10,7 +10,7 @@ import { useStyles2 } from '../../themes/ThemeContext';
 import { List } from '../List/List';
 
 interface DataLinkSuggestionsProps {
-  activeRef?: React.RefObject<HTMLDivElement>;
+  activeRef?: React.RefObject<HTMLDivElement | null>;
   suggestions: VariableSuggestion[];
   activeIndex: number;
   onSuggestionSelect: (suggestion: VariableSuggestion) => void;
@@ -103,7 +103,7 @@ DataLinkSuggestions.displayName = 'DataLinkSuggestions';
 interface DataLinkSuggestionsListProps extends DataLinkSuggestionsProps {
   label: string;
   activeIndexOffset: number;
-  activeRef?: React.RefObject<HTMLDivElement>;
+  activeRef?: React.RefObject<HTMLDivElement | null>;
 }
 
 const DataLinkSuggestionsList = React.memo(

packages/grafana-ui/src/components/DateTimePickers/TimeRangePicker/hooks.test.tsx

@@ -13,7 +13,7 @@ describe('useListFocus', () => {
 
   const testid = 'test';
   const getListElement = (
-    ref: RefObject<HTMLUListElement>,
+    ref: RefObject<HTMLUListElement | null>,
     handleKeys?: (event: KeyboardEvent) => void,
     onClick?: () => void
   ) => (

packages/grafana-ui/src/components/DateTimePickers/TimeRangePicker/hooks.ts

@@ -7,7 +7,7 @@ const CAUGHT_KEYS = ['ArrowUp', 'ArrowDown', 'Home', 'End', 'Enter', 'Tab'];
 
 /** @internal */
 export interface UseListFocusProps {
-  localRef: RefObject<HTMLUListElement>;
+  localRef: RefObject<HTMLUListElement | null>;
   options: TimeOption[];
 }
 

packages/grafana-ui/src/components/Input/utils.ts

@@ -1,6 +1,6 @@
 import { RefObject, useRef } from 'react';
 
-export function useFocus(): [RefObject<HTMLInputElement>, () => void] {
+export function useFocus(): [RefObject<HTMLInputElement | null>, () => void] {
   const ref = useRef<HTMLInputElement>(null);
   const setFocus = () => {
     ref.current && ref.current.focus();

packages/grafana-ui/src/components/Menu/hooks.test.tsx

@@ -13,7 +13,7 @@ describe('useMenuFocus', () => {
 
   const testid = 'test';
   const getMenuElement = (
-    ref: RefObject<HTMLDivElement>,
+    ref: RefObject<HTMLDivElement | null>,
     handleKeys?: (event: KeyboardEvent) => void,
     handleFocus?: () => void,
     onClick?: () => void

packages/grafana-ui/src/components/Menu/hooks.ts

@@ -6,7 +6,7 @@ const UNFOCUSED = -1;
 
 /** @internal */
 export interface UseMenuFocusProps {
-  localRef: RefObject<HTMLDivElement>;
+  localRef: RefObject<HTMLDivElement | null>;
   isMenuOpen?: boolean;
   close?: () => void;
   onOpen?: (focusOnItem: (itemId: number) => void) => void;

packages/grafana-ui/src/components/RenderUserContentAsHTML/RenderUserContentAsHTML.tsx

@@ -1,11 +1,10 @@
-import { HTMLAttributes, PropsWithChildren, type JSX } from 'react';
-import * as React from 'react';
+import { createElement, type HTMLAttributes, type PropsWithChildren, type HTMLElementType, type JSX } from 'react';
 
 import { textUtil } from '@grafana/data';
 
 export interface RenderUserContentAsHTMLProps<T = HTMLSpanElement>
   extends Omit<HTMLAttributes<T>, 'dangerouslySetInnerHTML'> {
-  component?: keyof React.ReactHTML;
+  component?: HTMLElementType;
   content: string;
 }
 
@@ -19,7 +18,7 @@ export function RenderUserContentAsHTML<T>({
   content,
   ...rest
 }: PropsWithChildren<RenderUserContentAsHTMLProps<T>>): JSX.Element {
-  return React.createElement(component || 'span', {
+  return createElement(component || 'span', {
     dangerouslySetInnerHTML: { __html: textUtil.sanitize(content) },
     ...rest,
   });

packages/grafana-ui/src/components/Table/TableNG/components/TableCellTooltip.tsx

@@ -20,7 +20,7 @@ export interface TableCellTooltipProps {
   field: Field;
   getActions: (field: Field, rowIdx: number) => ActionModel[];
   getTextColorForBackground: (bgColor: string) => string;
-  gridRef: RefObject<DataGridHandle>;
+  gridRef: RefObject<DataGridHandle | null>;
   height: number;
   placement?: TableCellTooltipPlacement;
   renderer: TableCellRenderer;

packages/grafana-ui/src/components/Table/TableNG/hooks.ts

@@ -463,7 +463,7 @@ export function useColumnResize(
   return dataGridResizeHandler;
 }
 
-export function useScrollbarWidth(ref: RefObject<DataGridHandle>, height: number) {
+export function useScrollbarWidth(ref: RefObject<DataGridHandle | null>, height: number) {
   const [scrollbarWidth, setScrollbarWidth] = useState(0);
 
   useLayoutEffect(() => {

packages/grafana-ui/src/components/Table/TableRT/RowsList.tsx

@@ -49,7 +49,7 @@ interface RowsListProps {
   listHeight: number;
   width: number;
   cellHeight?: TableCellHeight;
-  listRef: React.RefObject<VariableSizeList>;
+  listRef: React.RefObject<VariableSizeList | null>;
   tableState: TableState;
   tableStyles: TableStyles;
   nestedDataField?: Field;

packages/grafana-ui/src/components/Table/TableRT/Table.tsx

@@ -135,7 +135,7 @@ export const Table = memo((props: Props) => {
   // `useTableStateReducer`, which is needed to construct options for `useTable` (the hook that returns
   // `toggleAllRowsExpanded`), and if we used a variable, that variable would be undefined at the time
   // we initialize `useTableStateReducer`.
-  const toggleAllRowsExpandedRef = useRef<(value?: boolean) => void>();
+  const toggleAllRowsExpandedRef = useRef<(value?: boolean) => void>(null);
 
   // Internal react table state reducer
   const stateReducer = useTableStateReducer({

packages/grafana-ui/src/components/Table/hooks.ts

@@ -14,8 +14,8 @@ import { GrafanaTableState } from './types';
   Select the scrollbar element from the VariableSizeList scope
  */
 export function useFixScrollbarContainer(
-  variableSizeListScrollbarRef: React.RefObject<HTMLDivElement>,
-  tableDivRef: React.RefObject<HTMLDivElement>
+  variableSizeListScrollbarRef: React.RefObject<HTMLDivElement | null>,
+  tableDivRef: React.RefObject<HTMLDivElement | null>
 ) {
   useEffect(() => {
     if (variableSizeListScrollbarRef.current && tableDivRef.current) {
@@ -43,7 +43,7 @@ export function useFixScrollbarContainer(
  */
 export function useResetVariableListSizeCache(
   extendedState: GrafanaTableState,
-  listRef: React.RefObject<VariableSizeList>,
+  listRef: React.RefObject<VariableSizeList | null>,
   data: DataFrame,
   hasUniqueId: boolean
 ) {

packages/grafana-ui/src/components/uPlot/geometries/EventsCanvas.tsx

@@ -19,7 +19,7 @@ interface EventsCanvasProps {
 }
 
 export function EventsCanvas({ id, events, renderEventMarker, mapEventToXYCoords, config }: EventsCanvasProps) {
-  const plotInstance = useRef<uPlot>();
+  const plotInstance = useRef<uPlot>(null);
   // render token required to re-render annotation markers. Rendering lines happens in uPlot and the props do not change
   // so we need to force the re-render when the draw hook was performed by uPlot
   const [renderToken, setRenderToken] = useState(0);

packages/grafana-ui/src/components/uPlot/plugins/TooltipPlugin2.tsx

@@ -140,7 +140,7 @@ export const TooltipPlugin2 = ({
 
   const [{ plot, isHovering, isPinned, contents, style, dismiss }, setState] = useReducer(mergeState, null, initState);
 
-  const sizeRef = useRef<TooltipContainerSize>();
+  const sizeRef = useRef<TooltipContainerSize>(null);
   const styles = useStyles2(getStyles, maxWidth);
 
   const renderRef = useRef(render);

packages/grafana-ui/src/graveyard/GraphNG/GraphNG.tsx

@@ -96,7 +96,7 @@ export interface GraphNGState {
 export class GraphNG extends Component<GraphNGProps, GraphNGState> {
   static contextType = PanelContextRoot;
   panelContext: PanelContext = {} as PanelContext;
-  private plotInstance: React.RefObject<uPlot>;
+  private plotInstance: React.RefObject<uPlot | null>;
 
   private subscription = new Subscription();
 

packages/grafana-ui/src/graveyard/uPlot/plugins/TooltipPlugin.tsx

@@ -53,7 +53,7 @@ export const TooltipPlugin = ({
   renderTooltip,
   ...otherProps
 }: TooltipPluginProps) => {
-  const plotInstance = useRef<uPlot>();
+  const plotInstance = useRef<uPlot>(null);
   const theme = useTheme2();
   const [focusedSeriesIdx, setFocusedSeriesIdx] = useState<number | null>(null);
   const [focusedPointIdx, setFocusedPointIdx] = useState<number | null>(null);

packages/grafana-ui/src/utils/useDelayedSwitch.ts

@@ -19,7 +19,7 @@ export function useDelayedSwitch(value: boolean, options: DelayOptions = {}): bo
   const { duration = 250, delay = 250 } = options;
 
   const [delayedValue, setDelayedValue] = useState(value);
-  const onStartTime = useRef<Date | undefined>();
+  const onStartTime = useRef<Date | undefined>(undefined);
 
   useEffect(() => {
     let timeout: ReturnType<typeof setTimeout> | undefined;

public/app/core/components/ForgottenPassword/ForgottenPassword.tsx

@@ -1,5 +1,6 @@
 import { css } from '@emotion/css';
 import { useState } from 'react';
+import { flushSync } from 'react-dom';
 import { useForm } from 'react-hook-form';
 
 import { GrafanaTheme2 } from '@grafana/data';
@@ -34,7 +35,10 @@ export const ForgottenPassword = () => {
   const sendEmail = async (formModel: EmailDTO) => {
     const res = await getBackendSrv().post('/api/user/password/send-reset-email', formModel);
     if (res) {
-      setEmailSent(true);
+      // TODO why?
+      flushSync(() => {
+        setEmailSent(true);
+      });
     }
   };
 

public/app/core/components/GraphNG/GraphNG.tsx

@@ -109,7 +109,7 @@ const defaultMatchers = {
  * "Time as X" core component, expects ascending x
  */
 export class GraphNG extends Component<GraphNGProps, GraphNGState> {
-  private plotInstance: React.RefObject<uPlot>;
+  private plotInstance: React.RefObject<uPlot | null>;
 
   constructor(props: GraphNGProps) {
     super(props);

public/app/core/components/SharedPreferences/SharedPreferences.test.tsx

@@ -1,3 +1,4 @@
+import { act } from '@testing-library/react';
 import { comboboxTestSetup } from 'test/helpers/comboboxTestSetup';
 import { getSelectParent, selectOptionInTest } from 'test/helpers/selectOptionInTest';
 import { render, screen, userEvent, waitFor, within } from 'test/test-utils';
@@ -29,7 +30,9 @@ const selectComboboxOptionInTest = async (input: HTMLElement, optionOrOptions: s
 };
 
 const setup = async () => {
-  const view = render(<SharedPreferences resourceUri="user" preferenceType="user" />);
+  // TODO investigate why we need act
+  // see https://github.com/testing-library/react-testing-library/issues/1375
+  const view = await act(() => render(<SharedPreferences resourceUri="user" preferenceType="user" />));
   const themeSelect = await screen.findByRole('combobox', { name: 'Interface theme' });
   await waitFor(() => expect(themeSelect).not.toBeDisabled());
   return view;

public/app/core/components/Signup/VerifyEmail.tsx

@@ -1,4 +1,5 @@
 import { useState } from 'react';
+import { flushSync } from 'react-dom';
 import { useForm } from 'react-hook-form';
 
 import { Trans, t } from '@grafana/i18n';
@@ -25,7 +26,10 @@ export const VerifyEmail = () => {
     getBackendSrv()
       .post('/api/user/signup', formModel)
       .then(() => {
-        setEmailSent(true);
+        // TODO why?
+        flushSync(() => {
+          setEmailSent(true);
+        });
       })
       .catch((err) => {
         const msg = err.data?.message || err;

public/app/features/alerting/unified/MuteTimings.test.tsx

@@ -1,3 +1,4 @@
+import { act, fireEvent } from '@testing-library/react';
 import { InitialEntry } from 'history';
 import { last } from 'lodash';
 import { Route, Routes } from 'react-router-dom-v5-compat';
@@ -144,8 +145,11 @@ const fillOutForm = async ({
 };
 
 const saveMuteTiming = async () => {
-  const user = userEvent.setup();
-  await user.click(await screen.findByText(/save time interval/i));
+  // TODO investigate why we need act/fireEvent
+  // see https://github.com/testing-library/react-testing-library/issues/1375
+  const button = await screen.findByText(/save time interval/i);
+  // eslint-disable-next-line testing-library/no-unnecessary-act, testing-library/prefer-user-event
+  await act(() => fireEvent.click(button));
 };
 
 setupMswServer();

public/app/features/alerting/unified/components/CollapseToggle.tsx

@@ -2,7 +2,7 @@ import { HTMLAttributes } from 'react';
 
 import { Button, IconSize } from '@grafana/ui';
 
-interface Props extends HTMLAttributes<HTMLButtonElement> {
+interface Props extends Omit<HTMLAttributes<HTMLButtonElement>, 'onToggle'> {
   isCollapsed: boolean;
   onToggle: (isCollapsed: boolean) => void;
   // Todo: this should be made compulsory for a11y purposes

public/app/features/alerting/unified/components/export/GrafanaModifyExport.test.tsx

@@ -1,7 +1,8 @@
+import { act, fireEvent } from '@testing-library/react';
 import * as React from 'react';
 import { Route, Routes } from 'react-router-dom-v5-compat';
 import { Props } from 'react-virtualized-auto-sizer';
-import { render, userEvent, waitFor, waitForElementToBeRemoved } from 'test/test-utils';
+import { render, waitFor, waitForElementToBeRemoved } from 'test/test-utils';
 import { byRole, byTestId, byText } from 'testing-library-selector';
 
 import { mockExportApi, setupMswServer } from '../../mockApi';
@@ -72,14 +73,15 @@ describe('GrafanaModifyExport', () => {
       json: 'Json Export Content',
     });
 
-    const user = userEvent.setup();
-
     renderModifyExport(grafanaRulerRule.grafana_alert.uid);
 
     await waitForElementToBeRemoved(() => ui.loading.get());
     expect(await ui.form.nameInput.find()).toHaveValue('Grafana-rule');
 
-    await user.click(ui.exportButton.get());
+    // TODO investigate why we need act
+    // see https://github.com/testing-library/react-testing-library/issues/1375
+    // eslint-disable-next-line testing-library/no-unnecessary-act, testing-library/prefer-user-event
+    await act(() => fireEvent.click(ui.exportButton.get()));
 
     const drawer = await ui.exportDrawer.dialog.find();
     expect(drawer).toBeInTheDocument();

public/app/features/alerting/unified/components/import-to-gma/ImportToGMARules.test.tsx

@@ -1,3 +1,4 @@
+import { act, fireEvent } from '@testing-library/react';
 import { render, testWithFeatureToggles, waitFor } from 'test/test-utils';
 import { byLabelText, byRole } from 'testing-library-selector';
 
@@ -156,7 +157,10 @@ groups:
       await user.click(await ui.dsImport.mimirDsOption.find());
 
       // Click the import button
-      await user.click(ui.importButton.get());
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      // eslint-disable-next-line testing-library/no-unnecessary-act, testing-library/prefer-user-event
+      await act(() => fireEvent.click(ui.importButton.get()));
 
       // Verify confirmation dialog appears
       expect(await ui.confirmationModal.find()).toBeInTheDocument();

public/app/features/alerting/unified/components/receivers/NewReceiverView.test.tsx

@@ -1,3 +1,4 @@
+import { act, fireEvent } from '@testing-library/react';
 import { Route, Routes } from 'react-router-dom-v5-compat';
 import { render, screen } from 'test/test-utils';
 import { byPlaceholderText, byRole, byTestId } from 'testing-library-selector';
@@ -65,7 +66,10 @@ describe('new receiver', () => {
     await user.type(email, 'tester@grafana.com');
 
     // try to test the contact point
-    await user.click(await ui.testContactPointButton.find());
+    // TODO investigate why we need act/fireEvent
+    // see https://github.com/testing-library/react-testing-library/issues/1375
+    // eslint-disable-next-line testing-library/no-unnecessary-act, testing-library/prefer-user-event
+    await act(async () => fireEvent.click(await ui.testContactPointButton.find()));
 
     expect(await ui.testContactPointModal.find()).toBeInTheDocument();
 

public/app/features/alerting/unified/components/rule-editor/AnnotationsStep.test.tsx

@@ -1,3 +1,4 @@
+import { act } from '@testing-library/react';
 import type { JSX } from 'react';
 import { FormProvider, useForm } from 'react-hook-form';
 import { render, screen, within } from 'test/test-utils';
@@ -301,15 +302,20 @@ describe('AnnotationsField', function () {
       })
     );
 
-    render(
-      <FormWrapper
-        formValues={{
-          annotations: [
-            { key: Annotation.dashboardUID, value: 'dash-test-uid' },
-            { key: Annotation.panelID, value: '1' },
-          ],
-        }}
-      />
+    // TODO investigate why we need act
+    // see https://github.com/testing-library/react-testing-library/issues/1375
+    // eslint-disable-next-line testing-library/no-unnecessary-act
+    await act(() =>
+      render(
+        <FormWrapper
+          formValues={{
+            annotations: [
+              { key: Annotation.dashboardUID, value: 'dash-test-uid' },
+              { key: Annotation.panelID, value: '1' },
+            ],
+          }}
+        />
+      )
     );
 
     expect(await ui.dashboardAnnotation.find()).toBeInTheDocument();

public/app/features/alerting/unified/components/rule-viewer/RuleViewer.test.tsx

@@ -479,7 +479,7 @@ describe('RuleViewer', () => {
         expect.objectContaining({
           ruleUid: 'test-rule-uid',
         }),
-        expect.any(Object)
+        undefined
       );
       expect(screen.getByTestId('enrichment-section')).toBeInTheDocument();
     });
@@ -500,7 +500,7 @@ describe('RuleViewer', () => {
         expect.objectContaining({
           ruleUid: 'test-rule-uid',
         }),
-        expect.any(Object)
+        undefined
       );
       expect(screen.getByTestId('enrichment-section')).toBeInTheDocument();
     });

public/app/features/alerting/unified/hooks/ruleGroup/useMoveRuleFromRuleGroup.test.tsx

@@ -1,3 +1,4 @@
+import { act, fireEvent } from '@testing-library/react';
 import { produce } from 'immer';
 import { render } from 'test/test-utils';
 import { byRole, byText } from 'testing-library-selector';
@@ -58,7 +59,7 @@ describe('Moving a Grafana managed rule', () => {
 
     const ruleID = fromRulerRuleAndRuleGroupIdentifier(currentRuleGroupID, ruleToMove);
 
-    const { user } = render(
+    render(
       <MoveRuleTestComponent
         currentRuleGroupIdentifier={currentRuleGroupID}
         targetRuleGroupIdentifier={targetRuleGroupID}
@@ -66,7 +67,10 @@ describe('Moving a Grafana managed rule', () => {
         rule={ruleToMove}
       />
     );
-    await user.click(byRole('button').get());
+    // TODO investigate why we need act/fireEvent
+    // see https://github.com/testing-library/react-testing-library/issues/1375
+    // eslint-disable-next-line testing-library/no-unnecessary-act, testing-library/prefer-user-event
+    await act(() => fireEvent.click(byRole('button').get()));
 
     expect(await byText(/success/i).find()).toBeInTheDocument();
 
@@ -87,7 +91,7 @@ describe('Moving a Grafana managed rule', () => {
       uid: 'does-not-exist',
     };
 
-    const { user } = render(
+    render(
       <MoveRuleTestComponent
         currentRuleGroupIdentifier={currentRuleGroupID}
         targetRuleGroupIdentifier={currentRuleGroupID}
@@ -95,7 +99,10 @@ describe('Moving a Grafana managed rule', () => {
         rule={grafanaRulerRule}
       />
     );
-    await user.click(byRole('button').get());
+    // TODO investigate why we need act/fireEvent
+    // see https://github.com/testing-library/react-testing-library/issues/1375
+    // eslint-disable-next-line testing-library/no-unnecessary-act, testing-library/prefer-user-event
+    await act(() => fireEvent.click(byRole('button').get()));
 
     expect(await byText(/error/i).find()).toBeInTheDocument();
   });
@@ -130,7 +137,7 @@ describe('Moving a Data source managed rule', () => {
       draft.grafana_alert.title = 'updated rule title';
     });
 
-    const { user } = render(
+    render(
       <MoveRuleTestComponent
         currentRuleGroupIdentifier={currentRuleGroupID}
         targetRuleGroupIdentifier={targetRuleGroupID}
@@ -138,7 +145,10 @@ describe('Moving a Data source managed rule', () => {
         rule={newRule}
       />
     );
-    await user.click(byRole('button').get());
+    // TODO investigate why we need act/fireEvent
+    // see https://github.com/testing-library/react-testing-library/issues/1375
+    // eslint-disable-next-line testing-library/no-unnecessary-act, testing-library/prefer-user-event
+    await act(() => fireEvent.click(byRole('button').get()));
 
     expect(await byText(/success/i).find()).toBeInTheDocument();
 
@@ -167,7 +177,7 @@ describe('Moving a Data source managed rule', () => {
 
     const ruleID = fromRulerRuleAndRuleGroupIdentifier(currentRuleGroupID, ruleToMove);
 
-    const { user } = render(
+    render(
       <MoveRuleTestComponent
         currentRuleGroupIdentifier={currentRuleGroupID}
         targetRuleGroupIdentifier={targetRuleGroupID}
@@ -175,7 +185,10 @@ describe('Moving a Data source managed rule', () => {
         rule={ruleToMove}
       />
     );
-    await user.click(byRole('button').get());
+    // TODO investigate why we need act/fireEvent
+    // see https://github.com/testing-library/react-testing-library/issues/1375
+    // eslint-disable-next-line testing-library/no-unnecessary-act, testing-library/prefer-user-event
+    await act(() => fireEvent.click(byRole('button').get()));
 
     expect(await byText(/success/i).find()).toBeInTheDocument();
 
@@ -206,7 +219,7 @@ describe('Moving a Data source managed rule', () => {
 
     const ruleID = fromRulerRuleAndRuleGroupIdentifier(currentRuleGroupID, ruleToMove);
 
-    const { user } = render(
+    render(
       <MoveRuleTestComponent
         currentRuleGroupIdentifier={currentRuleGroupID}
         targetRuleGroupIdentifier={targetRuleGroupID}
@@ -214,7 +227,10 @@ describe('Moving a Data source managed rule', () => {
         rule={ruleToMove}
       />
     );
-    await user.click(byRole('button').get());
+    // TODO investigate why we need act/fireEvent
+    // see https://github.com/testing-library/react-testing-library/issues/1375
+    // eslint-disable-next-line testing-library/no-unnecessary-act, testing-library/prefer-user-event
+    await act(() => fireEvent.click(byRole('button').get()));
 
     expect(await byText(/success/i).find()).toBeInTheDocument();
 
@@ -239,7 +255,7 @@ describe('Moving a Data source managed rule', () => {
       draft.grafana_alert.title = 'updated rule title';
     });
 
-    const { user } = render(
+    render(
       <MoveRuleTestComponent
         currentRuleGroupIdentifier={curentRuleGroupID}
         targetRuleGroupIdentifier={curentRuleGroupID}
@@ -247,7 +263,10 @@ describe('Moving a Data source managed rule', () => {
         rule={newRule}
       />
     );
-    await user.click(byRole('button').get());
+    // TODO investigate why we need act/fireEvent
+    // see https://github.com/testing-library/react-testing-library/issues/1375
+    // eslint-disable-next-line testing-library/no-unnecessary-act, testing-library/prefer-user-event
+    await act(() => fireEvent.click(byRole('button').get()));
 
     expect(await byText(/error/i).find()).toBeInTheDocument();
   });

public/app/features/alerting/unified/hooks/ruleGroup/usePauseAlertRule.test.tsx

@@ -31,7 +31,6 @@ describe('pause rule', () => {
     expect(byText(/uninitialized/i).get()).toBeInTheDocument();
 
     await userEvent.click(byRole('button').get());
-    expect(await byText(/loading/i).find()).toBeInTheDocument();
 
     expect(await byText(/success/i).find()).toBeInTheDocument();
     expect(await byText(/result/i).find()).toBeInTheDocument();
@@ -68,7 +67,6 @@ describe('pause rule', () => {
     expect(await byText(/uninitialized/i).find()).toBeInTheDocument();
 
     await userEvent.click(byRole('button').get());
-    expect(await byText(/loading/i).find()).toBeInTheDocument();
     expect(byText(/success/i).query()).not.toBeInTheDocument();
     expect(await byText(/error:(.+)oops/i).find()).toBeInTheDocument();
   });

public/app/features/alerting/unified/hooks/useAsync.tsx

@@ -84,8 +84,8 @@ export function useAsync<Result, Args extends unknown[] = unknown[]>(
     error: undefined,
     result: initialValue,
   });
-  const promiseRef = useRef<Promise<Result>>();
-  const argsRef = useRef<Args>();
+  const promiseRef = useRef<Promise<Result>>(undefined);
+  const argsRef = useRef<Args>(undefined);
 
   const methods = useSyncedRef({
     execute(...params: Args) {

public/app/features/alerting/unified/hooks/usePrometheusConsistencyCheck.ts

@@ -155,8 +155,8 @@ export function useRuleGroupConsistencyCheck() {
   const { isGroupInSync } = useRuleGroupIsInSync();
   const [groupConsistent, setGroupConsistent] = useState<boolean | undefined>();
 
-  const apiCheckInterval = useRef<ReturnType<typeof setTimeout> | undefined>();
-  const timeoutInterval = useRef<ReturnType<typeof setTimeout> | undefined>();
+  const apiCheckInterval = useRef<ReturnType<typeof setTimeout> | undefined>(undefined);
+  const timeoutInterval = useRef<ReturnType<typeof setTimeout> | undefined>(undefined);
 
   useEffect(() => {
     return () => {
@@ -245,8 +245,8 @@ export function useRuleGroupConsistencyCheck() {
 export function usePrometheusConsistencyCheck() {
   const { matchingPromRuleExists } = useMatchingPromRuleExists();
 
-  const removalConsistencyInterval = useRef<number | undefined>();
-  const creationConsistencyInterval = useRef<number | undefined>();
+  const removalConsistencyInterval = useRef<number | undefined>(undefined);
+  const creationConsistencyInterval = useRef<number | undefined>(undefined);
 
   useEffect(() => {
     return () => {

public/app/features/alerting/unified/rule-list/GroupedView.test.tsx

@@ -1,3 +1,4 @@
+import { act, fireEvent } from '@testing-library/react';
 import { render, screen, waitFor, within } from 'test/test-utils';
 import { byRole } from 'testing-library-selector';
 
@@ -58,7 +59,10 @@ describe('RuleList - GroupedView', () => {
   });
 
   it('should paginate through groups', async () => {
-    const { user } = render(<GroupedView />);
+    // TODO investigate why we need act
+    // see https://github.com/testing-library/react-testing-library/issues/1375
+    // eslint-disable-next-line testing-library/no-unnecessary-act
+    await act(() => render(<GroupedView />));
 
     const mimirSection = await ui.dsSection(/Mimir/).find();
 
@@ -73,7 +77,10 @@ describe('RuleList - GroupedView', () => {
     expect(firstPageGroups[39]).toHaveTextContent('test-group-40');
 
     const loadMoreButton = await within(mimirSection).findByRole('button', { name: /Show more/i });
-    await user.click(loadMoreButton);
+    // TODO investigate why we need act/fireEvent
+    // see https://github.com/testing-library/react-testing-library/issues/1375
+    // eslint-disable-next-line testing-library/no-unnecessary-act, testing-library/prefer-user-event
+    await act(() => fireEvent.click(loadMoreButton));
 
     await waitFor(() => expect(loadMoreButton).toBeEnabled());
 
@@ -86,7 +93,10 @@ describe('RuleList - GroupedView', () => {
   });
 
   it('should disable next button when there is no more data', async () => {
-    const { user } = render(<GroupedView />);
+    // TODO investigate why we need act
+    // see https://github.com/testing-library/react-testing-library/issues/1375
+    // eslint-disable-next-line testing-library/no-unnecessary-act
+    await act(() => render(<GroupedView />));
 
     const prometheusSection = await ui.dsSection(/Prometheus/).find();
     const promNamespace = await ui.namespace(/test-prometheus-namespace/).find(prometheusSection);
@@ -96,17 +106,27 @@ describe('RuleList - GroupedView', () => {
     await ui.group('test-group-40').find(promNamespace);
 
     // fetch page 2
-    await user.click(await loadMoreButton.find(prometheusSection));
+    // TODO investigate why we need act/fireEvent
+    // see https://github.com/testing-library/react-testing-library/issues/1375
+    // eslint-disable-next-line testing-library/no-unnecessary-act, testing-library/prefer-user-event
+    await act(async () => fireEvent.click(await loadMoreButton.find(prometheusSection)));
+    // await user.click(await loadMoreButton.find(prometheusSection));
     // we should now have all groups 1-80
     await ui.group('test-group-80').find(promNamespace);
 
     // fetch page 3
-    await user.click(await loadMoreButton.find(prometheusSection));
+    // TODO investigate why we need act/fireEvent
+    // see https://github.com/testing-library/react-testing-library/issues/1375
+    // eslint-disable-next-line testing-library/no-unnecessary-act, testing-library/prefer-user-event
+    await act(async () => fireEvent.click(await loadMoreButton.find(prometheusSection)));
     // we should now have all groups 1-120
     await ui.group('test-group-120').find(promNamespace);
 
     // fetch page 4
-    await user.click(await loadMoreButton.find(prometheusSection));
+    // TODO investigate why we need act/fireEvent
+    // see https://github.com/testing-library/react-testing-library/issues/1375
+    // eslint-disable-next-line testing-library/no-unnecessary-act, testing-library/prefer-user-event
+    await act(async () => fireEvent.click(await loadMoreButton.find(prometheusSection)));
     // we should now have all groups 1-130
     await ui.group('test-group-130').find(promNamespace);
 

public/app/features/alerting/unified/rule-list/LoadMoreHelper.tsx

@@ -7,6 +7,9 @@ type Props = {
 
 function LoadMoreHelper({ handleLoad }: Props) {
   const intersectionRef = useRef<HTMLDivElement>(null);
+  // TODO remove when react-use is fixed
+  // see https://github.com/streamich/react-use/issues/2612
+  // @ts-expect-error
   const intersection = useIntersection(intersectionRef, {
     root: null,
     threshold: 1,

public/app/features/annotations/components/StandardAnnotationQueryEditor.test.tsx

@@ -67,7 +67,7 @@ describe('StandardAnnotationQueryEditor', () => {
       expect.objectContaining({
         query: expect.objectContaining({ queryType: 'defaultAnnotationsQuery', refId: 'initialAnnotationRef' }),
       }),
-      expect.anything()
+      undefined
     );
   });
 
@@ -85,7 +85,7 @@ describe('StandardAnnotationQueryEditor', () => {
       expect.objectContaining({
         query: expect.objectContaining({ refId: 'initialAnnotationRef' }),
       }),
-      expect.anything()
+      undefined
     );
   });
 
@@ -204,7 +204,7 @@ describe('StandardAnnotationQueryEditor', () => {
           refId: 'A',
         }),
       }),
-      expect.anything()
+      undefined
     );
   });
 
@@ -242,7 +242,7 @@ describe('StandardAnnotationQueryEditor', () => {
           legendFormat: '{{method}} {{endpoint}}',
         }),
       }),
-      expect.anything()
+      undefined
     );
   });
 
@@ -284,7 +284,7 @@ describe('StandardAnnotationQueryEditor', () => {
           refId: 'AnnoTarget',
         }),
       }),
-      expect.anything()
+      undefined
     );
   });
 
@@ -320,7 +320,7 @@ describe('StandardAnnotationQueryEditor', () => {
           expr: 'up',
         }),
       }),
-      expect.anything()
+      undefined
     );
   });
 

public/app/features/commandPalette/actions/scopeActions.tsx

@@ -141,7 +141,7 @@ function useScopesRow(onApply: () => void) {
 function useGlobalScopesSearch(searchQuery: string, parentId?: string | null) {
   const { selectScope, searchAllNodes, getScopeNodes } = useScopeServicesState();
   const [actions, setActions] = useState<CommandPaletteAction[] | undefined>(undefined);
-  const searchQueryRef = useRef<string>();
+  const searchQueryRef = useRef<string>(undefined);
 
   useEffect(() => {
     if ((!parentId || parentId === 'scopes') && searchQuery && config.featureToggles.scopeSearchAllLevels) {

public/app/features/correlations/CorrelationsPage.test.tsx

@@ -1,4 +1,4 @@
-import { render, waitFor, screen, within, Matcher, getByRole } from '@testing-library/react';
+import { render, waitFor, screen, within, Matcher, getByRole, act, fireEvent } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import { merge, uniqueId } from 'lodash';
 import { openMenu } from 'react-select-event';
@@ -300,7 +300,9 @@ describe('CorrelationsPage', () => {
       await userEvent.click(screen.getByText('Regular expression'));
       await userEvent.type(screen.getByLabelText(/expression/i), 'test expression');
 
-      await userEvent.click(await screen.findByRole('button', { name: /add$/i }));
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(() => fireEvent.click(screen.getByRole('button', { name: /add$/i })));
 
       await waitFor(() => {
         expect(mocks.reportInteraction).toHaveBeenCalledWith('grafana_correlations_added');
@@ -451,7 +453,9 @@ describe('CorrelationsPage', () => {
       await userEvent.clear(screen.getByRole('textbox', { name: /results field/i }));
       await userEvent.type(screen.getByRole('textbox', { name: /results field/i }), 'Line');
 
-      await userEvent.click(screen.getByRole('button', { name: /add$/i }));
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(() => fireEvent.click(screen.getByRole('button', { name: /add$/i })));
 
       await waitFor(() => {
         expect(mocks.reportInteraction).toHaveBeenCalledWith('grafana_correlations_added');
@@ -518,7 +522,9 @@ describe('CorrelationsPage', () => {
       await userEvent.click(screen.getByRole('button', { name: /next$/i }));
       await userEvent.click(screen.getByRole('button', { name: /next$/i }));
 
-      await userEvent.click(screen.getByRole('button', { name: /save$/i }));
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(() => fireEvent.click(screen.getByRole('button', { name: /save$/i })));
 
       expect(await screen.findByRole('cell', { name: /edited label$/i }, { timeout: 5000 })).toBeInTheDocument();
 
@@ -536,7 +542,9 @@ describe('CorrelationsPage', () => {
       const rowExpanderButton = within(tableRows[0]).getByRole('button', { name: /toggle row expanded/i });
       await userEvent.click(rowExpanderButton);
 
-      await userEvent.click(screen.getByRole('button', { name: /next$/i }));
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(() => fireEvent.click(screen.getByRole('button', { name: /next$/i })));
       await userEvent.click(screen.getByRole('button', { name: /next$/i }));
 
       // select Logfmt, be sure expression field is disabled
@@ -575,7 +583,9 @@ describe('CorrelationsPage', () => {
       await userEvent.click(screen.getByRole('button', { name: /save$/i }));
       expect(screen.getByText('Please define an expression')).toBeInTheDocument();
       await userEvent.type(screen.getByLabelText(/expression/i), 'test expression');
-      await userEvent.click(screen.getByRole('button', { name: /save$/i }));
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(() => fireEvent.click(screen.getByRole('button', { name: /save$/i })));
       await waitFor(() => {
         expect(mocks.reportInteraction).toHaveBeenCalledWith('grafana_correlations_edited');
       });
@@ -726,7 +736,9 @@ describe('CorrelationsPage', () => {
       expect(descriptionInput).toBeInTheDocument();
       expect(descriptionInput).toHaveAttribute('readonly');
 
-      await userEvent.click(screen.getByRole('button', { name: /next$/i }));
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(() => fireEvent.click(screen.getByRole('button', { name: /next$/i })));
       await userEvent.click(screen.getByRole('button', { name: /next$/i }));
 
       // expect the transformation to exist but be read only

public/app/features/dashboard-scene/pages/DashboardScenePage.test.tsx

@@ -58,7 +58,7 @@ jest.mock('app/features/plugins/extensions/getPluginExtensions', () => ({
   createPluginExtensionsGetter: () => getPluginExtensionsMock,
 }));
 
-function setup({ routeProps }: { routeProps?: Partial<GrafanaRouteComponentProps> } = {}) {
+async function setup({ routeProps }: { routeProps?: Partial<GrafanaRouteComponentProps> } = {}) {
   const context = getGrafanaContextMock();
   const defaultRouteProps = getRouteComponentProps();
   const props: Props = {
@@ -66,21 +66,29 @@ function setup({ routeProps }: { routeProps?: Partial<GrafanaRouteComponentProps
     ...routeProps,
   };
 
-  const renderResult = render(
-    <TestProvider grafanaContext={context}>
-      <LocationServiceProvider service={locationService}>
-        <DashboardScenePage {...props} />
-      </LocationServiceProvider>
-    </TestProvider>
-  );
-
-  const rerender = (newProps: Props) => {
-    renderResult.rerender(
+  // react 19 changed how suspense rendering works
+  // RTL hasn't caught up yet
+  // see https://github.com/testing-library/react-testing-library/issues/1375
+  // TODO remove this hack when RTL is updated. probably `render` itself will become async
+  const renderResult = await act(async () =>
+    render(
       <TestProvider grafanaContext={context}>
         <LocationServiceProvider service={locationService}>
-          <DashboardScenePage {...newProps} />
+          <DashboardScenePage {...props} />
         </LocationServiceProvider>
       </TestProvider>
+    )
+  );
+
+  const rerender = async (newProps: Props) => {
+    await act(async () =>
+      renderResult.rerender(
+        <TestProvider grafanaContext={context}>
+          <LocationServiceProvider service={locationService}>
+            <DashboardScenePage {...newProps} />
+          </LocationServiceProvider>
+        </TestProvider>
+      )
     );
   };
 
@@ -152,6 +160,8 @@ describe('DashboardScenePage', () => {
   beforeEach(() => {
     locationService.push('/d/my-dash-uid');
     getDashboardScenePageStateManager().clearDashboardCache();
+    getDashboardScenePageStateManager().clearSceneCache();
+    getDashboardScenePageStateManager().clearState();
     loadDashboardMock.mockClear();
     loadDashboardMock.mockResolvedValue({ dashboard: simpleDashboard, meta: { slug: '123' } });
     // hacky way because mocking autosizer does not work
@@ -163,7 +173,7 @@ describe('DashboardScenePage', () => {
   });
 
   it('Can render dashboard', async () => {
-    setup();
+    await setup();
 
     await waitForDashboardToRender();
 
@@ -175,7 +185,7 @@ describe('DashboardScenePage', () => {
   });
 
   it('routeReloadCounter should trigger reload', async () => {
-    const { rerender, props } = setup();
+    const { rerender, props } = await setup();
 
     await waitForDashboardToRender();
 
@@ -190,13 +200,13 @@ describe('DashboardScenePage', () => {
 
     props.location.state = { routeReloadCounter: 1 };
 
-    rerender(props);
+    await rerender(props);
 
     expect(await screen.findByTitle('Updated title')).toBeInTheDocument();
   });
 
   it('Can inspect panel', async () => {
-    setup();
+    await setup();
 
     await waitForDashboardToRender();
 
@@ -218,7 +228,7 @@ describe('DashboardScenePage', () => {
   });
 
   it('Can view panel in fullscreen', async () => {
-    setup();
+    await setup();
 
     await waitForDashboardToRender();
 
@@ -238,7 +248,7 @@ describe('DashboardScenePage', () => {
         interval: {} as SystemDateFormatsState['interval'],
         useBrowserLocale: true,
       });
-      setup();
+      await setup();
 
       await waitForDashboardToRenderWithTimeRange({
         from: '03/11/2025, 02:09:37 AM',
@@ -257,7 +267,7 @@ describe('DashboardScenePage', () => {
         interval: {} as SystemDateFormatsState['interval'],
         useBrowserLocale: true,
       });
-      setup();
+      await setup();
 
       await waitForDashboardToRenderWithTimeRange({
         from: '11.03.2025, 02:09:37',
@@ -269,17 +279,17 @@ describe('DashboardScenePage', () => {
   describe('empty state', () => {
     it('Shows empty state when dashboard is empty', async () => {
       loadDashboardMock.mockResolvedValue({ dashboard: { uid: 'my-dash-uid', panels: [] }, meta: {} });
-      setup();
+      await setup();
 
       expect(await screen.findByText('Start your new dashboard by adding a visualization')).toBeInTheDocument();
     });
 
     it('shows and hides empty state when panels are added and removed', async () => {
-      setup();
+      await setup();
 
       await waitForDashboardToRender();
 
-      expect(await screen.queryByText('Start your new dashboard by adding a visualization')).not.toBeInTheDocument();
+      expect(screen.queryByText('Start your new dashboard by adding a visualization')).not.toBeInTheDocument();
 
       // Hacking a bit, accessing private cache property to get access to the underlying DashboardScene object
       const dashboardScenesCache = getDashboardScenePageStateManager().getCache();
@@ -289,7 +299,7 @@ describe('DashboardScenePage', () => {
       act(() => {
         dashboard.removePanel(panels[0]);
       });
-      expect(await screen.queryByText('Start your new dashboard by adding a visualization')).not.toBeInTheDocument();
+      expect(screen.queryByText('Start your new dashboard by adding a visualization')).not.toBeInTheDocument();
 
       act(() => {
         dashboard.removePanel(panels[1]);
@@ -301,14 +311,14 @@ describe('DashboardScenePage', () => {
       });
 
       expect(await screen.findByTitle('Panel Added')).toBeInTheDocument();
-      expect(await screen.queryByText('Start your new dashboard by adding a visualization')).not.toBeInTheDocument();
+      expect(screen.queryByText('Start your new dashboard by adding a visualization')).not.toBeInTheDocument();
     });
   });
 
   describe('home page', () => {
     it('should render the dashboard when the route is home', async () => {
       (useParams as jest.Mock).mockReturnValue({});
-      setup({
+      await setup({
         routeProps: {
           route: {
             ...getRouteComponentProps().route,
@@ -331,7 +341,7 @@ describe('DashboardScenePage', () => {
       loadDashboardMock.mockClear();
       loadDashboardMock.mockResolvedValue({ dashboard: { uid: 'my-dash-uid', panels: [] }, meta: {} });
 
-      setup();
+      await setup();
 
       await waitFor(() => expect(screen.queryByText('Refresh')).toBeInTheDocument());
       await waitFor(() => expect(screen.queryByText('Last 6 hours')).toBeInTheDocument());
@@ -363,7 +373,7 @@ describe('DashboardScenePage', () => {
         isHandled: true,
       });
 
-      setup();
+      await setup();
 
       expect(await screen.findByTestId(selectors.components.EntityNotFound.container)).toBeInTheDocument();
     });
@@ -387,7 +397,7 @@ describe('DashboardScenePage', () => {
         isHandled: true,
       });
 
-      setup();
+      await setup();
 
       expect(await screen.findByTestId('dashboard-page-error')).toBeInTheDocument();
       expect(await screen.findByTestId('dashboard-page-error')).toHaveTextContent('Internal server error');
@@ -396,7 +406,7 @@ describe('DashboardScenePage', () => {
     it('should render error alert for runtime errors', async () => {
       setupLoadDashboardRuntimeErrorMock();
 
-      setup();
+      await setup();
 
       expect(await screen.findByTestId('dashboard-page-error')).toBeInTheDocument();
       expect(await screen.findByTestId('dashboard-page-error')).toHaveTextContent('Runtime error');
@@ -411,7 +421,7 @@ describe('DashboardScenePage', () => {
       const manager = getDashboardScenePageStateManager();
       manager.setActiveManager('v2');
 
-      const { unmount } = setup();
+      const { unmount } = await setup();
 
       expect(manager['activeManager']).toBeInstanceOf(DashboardScenePageStateManagerV2);
       unmount();

public/app/features/dashboard-scene/pages/PublicDashboardScenePage.test.tsx

@@ -1,4 +1,4 @@
-import { screen, waitForElementToBeRemoved } from '@testing-library/react';
+import { act, screen } from '@testing-library/react';
 import { Route, Routes } from 'react-router-dom-v5-compat';
 import { of } from 'rxjs';
 import { render } from 'test/test-utils';
@@ -26,7 +26,7 @@ jest.mock('@grafana/runtime', () => ({
   },
 }));
 
-function setup(token = 'an-access-token') {
+async function setup(token = 'an-access-token') {
   const pubdashProps: PublicDashboardSceneProps = {
     ...getRouteComponentProps({
       route: {
@@ -37,11 +37,19 @@ function setup(token = 'an-access-token') {
     }),
   };
 
-  return render(
-    <Routes>
-      <Route path="/public-dashboards/:accessToken" element={<PublicDashboardScenePage {...pubdashProps} />} />
-    </Routes>,
-    { historyOptions: { initialEntries: [`/public-dashboards/${token}`] } }
+  // TODO investigate why act is needed here
+  // see https://github.com/testing-library/react-testing-library/issues/1375
+  return await act(() =>
+    render(
+      <Routes>
+        <Route
+          path="/public-dashboards/:accessToken"
+          element={<PublicDashboardScenePage {...pubdashProps} />}
+          key={token}
+        />
+      </Routes>,
+      { historyOptions: { initialEntries: [`/public-dashboards/${token}`] } }
+    )
   );
 }
 
@@ -115,7 +123,6 @@ const publicDashboardSceneSelector = e2eSelectors.pages.PublicDashboardScene;
 
 describe('PublicDashboardScenePage', () => {
   beforeEach(() => {
-    config.publicDashboardAccessToken = 'an-access-token';
     getDashboardScenePageStateManager().clearDashboardCache();
     setupLoadDashboardMock({ dashboard: simpleDashboard, meta: {} });
 
@@ -125,7 +132,9 @@ describe('PublicDashboardScenePage', () => {
   });
 
   it('can render public dashboard', async () => {
-    setup();
+    const accessToken = 'an-access-token';
+    config.publicDashboardAccessToken = accessToken;
+    await setup(accessToken);
 
     await waitForDashboardGridToRender();
 
@@ -139,7 +148,9 @@ describe('PublicDashboardScenePage', () => {
   });
 
   it('cannot see menu panel', async () => {
-    setup();
+    const accessToken = 'cannot-see-menu-panel';
+    config.publicDashboardAccessToken = accessToken;
+    await setup(accessToken);
 
     await waitForDashboardGridToRender();
 
@@ -148,7 +159,9 @@ describe('PublicDashboardScenePage', () => {
   });
 
   it('shows time controls when it is not hidden', async () => {
-    setup();
+    const accessToken = 'shows-time-controls';
+    config.publicDashboardAccessToken = accessToken;
+    await setup(accessToken);
 
     await waitForDashboardGridToRender();
 
@@ -158,7 +171,9 @@ describe('PublicDashboardScenePage', () => {
   });
 
   it('does not render paused or deleted screen', async () => {
-    setup();
+    const accessToken = 'does-not-render-paused-or-deleted-screen';
+    config.publicDashboardAccessToken = accessToken;
+    await setup(accessToken);
 
     await waitForDashboardGridToRender();
 
@@ -172,7 +187,7 @@ describe('PublicDashboardScenePage', () => {
       dashboard: { ...simpleDashboard, timepicker: { hidden: true } },
       meta: {},
     });
-    setup(accessToken);
+    await setup(accessToken);
 
     await waitForDashboardGridToRender();
 
@@ -207,9 +222,7 @@ describe('given unavailable public dashboard', () => {
       },
     });
 
-    setup(accessToken);
-
-    await waitForElementToBeRemoved(screen.getByTestId(publicDashboardSceneSelector.loadingPage));
+    await setup(accessToken);
 
     expect(screen.queryByTestId(publicDashboardSceneSelector.page)).not.toBeInTheDocument();
     expect(screen.getByTestId(publicDashboardSelector.NotAvailable.title)).toBeInTheDocument();
@@ -239,9 +252,7 @@ describe('given unavailable public dashboard', () => {
       },
     });
 
-    setup(accessToken);
-
-    await waitForElementToBeRemoved(screen.getByTestId(publicDashboardSceneSelector.loadingPage));
+    await setup(accessToken);
 
     expect(screen.queryByTestId(publicDashboardSelector.page)).not.toBeInTheDocument();
     expect(screen.queryByTestId(publicDashboardSelector.NotAvailable.pausedDescription)).not.toBeInTheDocument();

public/app/features/dashboard-scene/saving/SaveDashboardAsForm.tsx

@@ -49,7 +49,7 @@ export function SaveDashboardAsForm({ dashboard, changeInfo }: Props) {
 
   const [contentSent, setContentSent] = useState<{ title?: string; folderUid?: string }>({});
 
-  const validationTimeoutRef = useRef<NodeJS.Timeout>();
+  const validationTimeoutRef = useRef<NodeJS.Timeout>(null);
 
   // Validate title on form mount to catch invalid default values
   useEffect(() => {
@@ -59,14 +59,18 @@ export function SaveDashboardAsForm({ dashboard, changeInfo }: Props) {
   // Cleanup timeout on unmount
   useEffect(() => {
     return () => {
-      clearTimeout(validationTimeoutRef.current);
+      if (validationTimeoutRef.current) {
+        clearTimeout(validationTimeoutRef.current);
+      }
     };
   }, []);
 
   const handleTitleChange = useCallback(
     (e: ChangeEvent<HTMLInputElement>) => {
       setValue('title', e.target.value, { shouldDirty: true });
-      clearTimeout(validationTimeoutRef.current);
+      if (validationTimeoutRef.current) {
+        clearTimeout(validationTimeoutRef.current);
+      }
       validationTimeoutRef.current = setTimeout(() => {
         trigger('title');
       }, 400);
@@ -75,7 +79,9 @@ export function SaveDashboardAsForm({ dashboard, changeInfo }: Props) {
   );
 
   const onSave = async (overwrite: boolean) => {
-    clearTimeout(validationTimeoutRef.current);
+    if (validationTimeoutRef.current) {
+      clearTimeout(validationTimeoutRef.current);
+    }
 
     const isTitleValid = await trigger('title');
 

public/app/features/dashboard-scene/scene/layouts-shared/scrollCanvasElementIntoView.ts

@@ -8,7 +8,7 @@ import { TabsLayoutManager } from '../layout-tabs/TabsLayoutManager';
  * Will scroll element into view. If element is not connected yet, it will try to expand rows
  * and switch tabs to make it visible.
  */
-export function scrollCanvasElementIntoView(sceneObject: SceneObject, ref: React.RefObject<HTMLElement>) {
+export function scrollCanvasElementIntoView(sceneObject: SceneObject, ref: React.RefObject<HTMLElement | null>) {
   if (ref.current?.isConnected) {
     scrollIntoView(ref.current);
     return;

public/app/features/dashboard/components/DashboardSettings/VersionsSettings.test.tsx

@@ -1,4 +1,4 @@
-import { screen, waitFor, within } from '@testing-library/react';
+import { act, fireEvent, screen, waitFor, within } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import { render } from 'test/test-utils';
 
@@ -154,7 +154,9 @@ describe('VersionSettings', () => {
     expect(within(screen.getAllByRole('rowgroup')[1]).getAllByRole('row').length).toBe(VERSIONS_FETCH_LIMIT);
 
     const showMoreButton = screen.getByRole('button', { name: /show more versions/i });
-    await user.click(showMoreButton);
+    // TODO investigate why we need act/fireEvent
+    // see https://github.com/testing-library/react-testing-library/issues/1375
+    act(() => fireEvent.click(showMoreButton));
 
     expect(historySrv.getHistoryList).toBeCalledTimes(2);
     expect(screen.getByText(/Fetching more entries/i)).toBeInTheDocument();

public/app/features/dashboard/components/PanelEditor/usePanelLatestData.ts

@@ -21,7 +21,7 @@ export const usePanelLatestData = (
   options: GetDataOptions,
   checkSchema?: boolean
 ): UsePanelLatestData => {
-  const querySubscription = useRef<Unsubscribable>();
+  const querySubscription = useRef<Unsubscribable>(null);
   const [latestData, setLatestData] = useState<PanelData>();
 
   useEffect(() => {

public/app/features/dashboard/components/TransformationsEditor/TransformationsEditor.tsx

@@ -61,7 +61,7 @@ interface State {
 
 class UnThemedTransformationsEditor extends React.PureComponent<TransformationsEditorProps, State> {
   subscription?: Unsubscribable;
-  ref: RefObject<HTMLDivElement>;
+  ref: RefObject<HTMLDivElement | null>;
 
   constructor(props: TransformationsEditorProps) {
     super(props);

public/app/features/dashboard/containers/PublicDashboardPageProxy.test.tsx

@@ -1,4 +1,4 @@
-import { screen, waitFor } from '@testing-library/react';
+import { act, screen, waitFor } from '@testing-library/react';
 import { Routes, Route } from 'react-router-dom-v5-compat';
 import { render } from 'test/test-utils';
 
@@ -62,7 +62,9 @@ describe('PublicDashboardPageProxy', () => {
   describe('when scene feature enabled', () => {
     it('should render PublicDashboardScenePage if publicDashboardsScene is enabled', async () => {
       config.featureToggles.publicDashboardsScene = true;
-      setup({});
+      // TODO investigate why we need act
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(() => setup({}));
 
       await waitFor(() => {
         expect(screen.queryByTestId(PublicDashboardScene.page)).toBeInTheDocument();

public/app/features/datasources/hooks.ts

@@ -64,7 +64,7 @@ export function useDatasource(dataSource: string | DataSourceRef | DataSourceIns
 
 export interface KeybaordNavigatableListProps {
   keyboardEvents?: Observable<React.KeyboardEvent>;
-  containerRef: React.RefObject<HTMLElement>;
+  containerRef: React.RefObject<HTMLElement | null>;
 }
 
 /**

public/app/features/dimensions/editors/ThresholdsEditor/ThresholdsEditor.tsx

@@ -25,7 +25,7 @@ interface State {
 }
 
 export class ThresholdsEditor extends PureComponent<Props, State> {
-  private latestThresholdInputRef: React.RefObject<HTMLInputElement>;
+  private latestThresholdInputRef: React.RefObject<HTMLInputElement | null>;
 
   constructor(props: Props) {
     super(props);

public/app/features/explore/ContentOutline/ContentOutline.tsx

@@ -46,6 +46,9 @@ export function ContentOutline({ scroller, panelId }: { scroller: HTMLElement |
   );
   const styles = useStyles2(getStyles, contentOutlineExpanded);
   const scrollerRef = useRef(scroller || null);
+  // TODO remove when react-use is fixed
+  // see https://github.com/streamich/react-use/issues/2612
+  // @ts-expect-error
   const { y: verticalScroll } = useScroll(scrollerRef);
   const { outlineItems } = useContentOutlineContext() ?? { outlineItems: [] };
   const [activeSectionId, setActiveSectionId] = useState(outlineItems[0]?.id);

public/app/features/explore/ExplorePaneContainer.tsx

@@ -74,7 +74,7 @@ export const ExplorePaneContainer = connector(ExplorePaneContainerUnconnected);
 
 function useStopQueries(exploreId: string) {
   const paneSelector = useMemo(() => getExploreItemSelector(exploreId), [exploreId]);
-  const paneRef = useRef<ReturnType<typeof paneSelector>>();
+  const paneRef = useRef<ReturnType<typeof paneSelector>>(null);
   paneRef.current = useSelector(paneSelector);
 
   useEffect(() => {

public/app/features/explore/TraceView/TraceView.tsx

@@ -63,7 +63,7 @@ type Props = {
   scrollElementClass?: string;
   traceProp: Trace;
   datasource: DataSourceApi<DataQuery, DataSourceJsonData, {}> | undefined;
-  topOfViewRef?: RefObject<HTMLDivElement>;
+  topOfViewRef?: RefObject<HTMLDivElement | null>;
   createSpanLink?: SpanLinkFunc;
   focusedSpanId?: string;
   createFocusSpanLink?: (traceId: string, spanId: string) => LinkModel<Field>;

public/app/features/explore/TraceView/components/TracePageHeader/SpanFilters/SpanFilters.tsx

@@ -57,7 +57,7 @@ export const SpanFilters = memo((props: SpanFilterProps) => {
   const [focusedSpanIndexForSearch, setFocusedSpanIndexForSearch] = useState(-1);
   const [tagKeys, setTagKeys] = useState<Array<SelectableValue<string>>>();
   const [tagValues, setTagValues] = useState<{ [key: string]: Array<SelectableValue<string>> }>({});
-  const prevTraceIdRef = useRef<string>();
+  const prevTraceIdRef = useRef<string>(null);
 
   const durationRegex = /^\d+(?:\.\d)?\d*(?:ns|us|µs|ms|s|m|h)$/;
 

public/app/features/explore/TraceView/components/TraceTimelineViewer/SpanDetail/SpanDetailLinkButtons.test.tsx

@@ -27,7 +27,8 @@ const timeRange = {
   to: new Date(1000),
 } as unknown as TimeRange;
 
-function getContent(result: React.ReactElement) {
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+function getContent(result: React.ReactElement<any>) {
   return result.props.children.props.children[0];
 }
 

public/app/features/explore/TraceView/components/TraceTimelineViewer/SpanDetail/index.tsx

@@ -561,7 +561,7 @@ const CardsContainer = ({
   mainContainerRef,
 }: {
   listOfContentCards: React.ReactNode[];
-  mainContainerRef?: React.RefObject<HTMLDivElement>;
+  mainContainerRef?: React.RefObject<HTMLDivElement | null>;
 }) => {
   const styles = useStyles2(getStyles);
 

public/app/features/explore/TraceView/components/TraceTimelineViewer/VirtualizedTraceView.tsx

@@ -102,7 +102,7 @@ type TVirtualizedTraceViewOwnProps = {
   focusedSpanIdForSearch: string;
   showSpanFilterMatchesOnly: boolean;
   createFocusSpanLink: (traceId: string, spanId: string) => LinkModel;
-  topOfViewRef?: RefObject<HTMLDivElement>;
+  topOfViewRef?: RefObject<HTMLDivElement | null>;
   datasourceType: string;
   datasourceUid: string;
   headerHeight: number;

public/app/features/explore/TraceView/components/TraceTimelineViewer/index.tsx

@@ -104,7 +104,7 @@ export type TProps = {
   focusedSpanIdForSearch: string;
   showSpanFilterMatchesOnly: boolean;
   createFocusSpanLink: (traceId: string, spanId: string) => LinkModel;
-  topOfViewRef?: RefObject<HTMLDivElement>;
+  topOfViewRef?: RefObject<HTMLDivElement | null>;
   headerHeight: number;
   criticalPath: CriticalPathSection[];
   traceFlameGraphs: TraceFlameGraphs;
@@ -197,8 +197,10 @@ export class UnthemedTraceTimelineViewer extends PureComponent<TProps, State> {
     return (
       <div
         className={styles.TraceTimelineViewer}
-        ref={(ref: HTMLDivElement | null) => {
-          ref && this.setState({ height: ref.getBoundingClientRect().height });
+        ref={(ref) => {
+          if (ref) {
+            this.setState({ height: ref.getBoundingClientRect().height });
+          }
         }}
       >
         <TimelineHeaderRow

public/app/features/invites/SignupInvited.test.tsx

@@ -1,4 +1,4 @@
-import { screen, waitFor, within } from '@testing-library/react';
+import { act, fireEvent, screen, waitFor, within } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import { render } from 'test/test-utils';
 
@@ -103,7 +103,9 @@ describe('SignupInvitedPage', () => {
         get: { email: '', invitedBy: '', name: '', username: '', orgName: '' },
       });
 
-      await userEvent.click(screen.getByRole('button', { name: /sign up/i }));
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(() => fireEvent.click(screen.getByRole('button', { name: /sign up/i })));
 
       await waitFor(() => expect(screen.getByText(/email is required/i)).toBeInTheDocument());
       expect(screen.getByText(/username is required/i)).toBeInTheDocument();

public/app/features/library-panels/components/LibraryPanelsView/LibraryPanelsView.tsx

@@ -43,7 +43,7 @@ export const LibraryPanelsView = ({
     }
   );
   const asyncDispatch = useMemo(() => asyncDispatcher(dispatch), [dispatch]);
-  const abortControllerRef = useRef<AbortController>();
+  const abortControllerRef = useRef<AbortController>(null);
 
   useDebounce(
     () => {

public/app/features/live/LiveConnectionWarning.tsx

@@ -12,7 +12,7 @@ export interface Props {}
 
 export const LiveConnectionWarning = memo(function LiveConnectionWarning() {
   const [show, setShow] = useState<boolean | undefined>(undefined);
-  const subscriptionRef = useRef<Unsubscribable>();
+  const subscriptionRef = useRef<Unsubscribable>(null);
   const styles = useStyles2(getStyle);
 
   useEffect(() => {

public/app/features/logs/components/panel/LogLineDetailsTrace.tsx

@@ -1,5 +1,6 @@
 import { css } from '@emotion/css';
 import { useEffect, useMemo, useState } from 'react';
+import { flushSync } from 'react-dom';
 import { isObservable, lastValueFrom } from 'rxjs';
 
 import { DataFrame, DataQueryRequest, DataSourceApi, GrafanaTheme2, TimeRange } from '@grafana/data';
@@ -31,7 +32,10 @@ export const LogLineDetailsTrace = ({ timeRange, timeZone, traceRef }: Props) =>
       .get(traceRef.dsUID)
       .then((dataSource) => {
         if (dataSource) {
-          setDataSource(dataSource);
+          // TODO why?
+          flushSync(() => {
+            setDataSource(dataSource);
+          });
         } else {
           setDataFrames(null);
         }

public/app/features/provisioning/Wizard/ProvisioningWizard.test.tsx

@@ -1,7 +1,7 @@
 import { QueryStatus } from '@reduxjs/toolkit/query';
-import { screen, waitFor } from '@testing-library/react';
+import { fireEvent, screen, waitFor } from '@testing-library/react';
 import { UserEvent } from '@testing-library/user-event';
-import type { JSX } from 'react';
+import { act, type JSX } from 'react';
 import { render } from 'test/test-utils';
 
 import {
@@ -237,7 +237,9 @@ describe('ProvisioningWizard', () => {
         path: '/',
       });
 
-      await user.click(screen.getByRole('button', { name: /Choose what to synchronize/i }));
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(() => fireEvent.click(screen.getByRole('button', { name: /Choose what to synchronize/i })));
 
       await waitFor(() => {
         expect(screen.getByRole('heading', { name: /2\. Choose what to synchronize/i })).toBeInTheDocument();
@@ -245,7 +247,9 @@ describe('ProvisioningWizard', () => {
 
       expect(mockUseCreateOrUpdateRepository).toHaveBeenCalled();
 
-      await user.click(screen.getByRole('button', { name: /Synchronize with external storage/i }));
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(() => fireEvent.click(screen.getByRole('button', { name: /Synchronize with external storage/i })));
 
       await waitFor(() => {
         expect(screen.getByRole('heading', { name: /3\. Synchronize with external storage/i })).toBeInTheDocument();
@@ -281,7 +285,9 @@ describe('ProvisioningWizard', () => {
         path: '/',
       });
 
-      await user.click(screen.getByRole('button', { name: /Choose what to synchronize/i }));
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(() => fireEvent.click(screen.getByRole('button', { name: /Choose what to synchronize/i })));
 
       await waitFor(() => {
         expect(screen.getByRole('heading', { name: /2\. Choose what to synchronize/i })).toBeInTheDocument();
@@ -339,7 +345,9 @@ describe('ProvisioningWizard', () => {
         path: '/',
       });
 
-      await user.click(screen.getByRole('button', { name: /Choose what to synchronize/i }));
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(() => fireEvent.click(screen.getByRole('button', { name: /Choose what to synchronize/i })));
 
       await waitFor(() => {
         expect(screen.getByText('Branch "invalid-branch" not found')).toBeInTheDocument();
@@ -373,7 +381,9 @@ describe('ProvisioningWizard', () => {
         path: '/',
       });
 
-      await user.click(screen.getByRole('button', { name: /Choose what to synchronize/i }));
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(() => fireEvent.click(screen.getByRole('button', { name: /Choose what to synchronize/i })));
 
       await waitFor(() => {
         expect(screen.getByRole('alert')).toBeInTheDocument();
@@ -414,7 +424,9 @@ describe('ProvisioningWizard', () => {
         path: '/',
       });
 
-      await user.click(screen.getByRole('button', { name: /Choose what to synchronize/i }));
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(() => fireEvent.click(screen.getByRole('button', { name: /Choose what to synchronize/i })));
 
       await waitFor(() => {
         expect(screen.getByRole('alert')).toBeInTheDocument();
@@ -442,13 +454,17 @@ describe('ProvisioningWizard', () => {
         path: '/',
       });
 
-      await user.click(screen.getByRole('button', { name: /Choose what to synchronize/i }));
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(() => fireEvent.click(screen.getByRole('button', { name: /Choose what to synchronize/i })));
 
       await waitFor(() => {
         expect(screen.getByRole('heading', { name: /2\. Choose what to synchronize/i })).toBeInTheDocument();
       });
 
-      await user.click(screen.getByRole('button', { name: /Previous/i }));
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(() => fireEvent.click(screen.getByRole('button', { name: /Previous/i })));
 
       await waitFor(() => {
         expect(screen.getByRole('heading', { name: /1\. Connect to external storage/i })).toBeInTheDocument();
@@ -485,7 +501,9 @@ describe('ProvisioningWizard', () => {
         path: '/',
       });
 
-      await user.click(screen.getByRole('button', { name: /Choose what to synchronize/i }));
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(() => fireEvent.click(screen.getByRole('button', { name: /Choose what to synchronize/i })));
 
       expect(screen.getByRole('button', { name: /Submitting.../i })).toBeDisabled();
     });
@@ -522,7 +540,9 @@ describe('ProvisioningWizard', () => {
         path: '/',
       });
 
-      await user.click(screen.getByRole('button', { name: /Choose what to synchronize/i }));
+      // TODO investigate why we need act/fireEvent
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(async () => fireEvent.click(screen.getByRole('button', { name: /Choose what to synchronize/i })));
 
       await waitFor(() => {
         expect(screen.getByRole('button', { name: /Synchronize with external storage/i })).toBeInTheDocument();

public/app/features/provisioning/components/BulkActions/BulkDeleteProvisionedResource.tsx

@@ -1,4 +1,5 @@
 import { useCallback, useState } from 'react';
+import { flushSync } from 'react-dom';
 import { FormProvider, useForm } from 'react-hook-form';
 
 import { AppEvents } from '@grafana/data';
@@ -43,7 +44,10 @@ function FormContent({ initialValues, selectedItems, repository, workflowOptions
   const workflow = watch('workflow');
 
   const handleSubmitForm = async (data: BulkActionFormData) => {
-    setHasSubmitted(true);
+    // TODO why?
+    flushSync(() => {
+      setHasSubmitted(true);
+    });
 
     const resources = collectSelectedItems(selectedItems);
 

public/app/features/search/hooks/useSearchKeyboardSelection.ts

@@ -38,7 +38,7 @@ export function useSearchKeyboardNavigation(
 ): ItemSelection {
   const highlightIndexRef = useRef<ItemSelection>({ x: 0, y: -1 });
   const [highlightIndex, setHighlightIndex] = useState<ItemSelection>({ x: 0, y: -1 });
-  const urlsRef = useRef<Field>();
+  const urlsRef = useRef<Field>(null);
 
   // Clear selection when the search results change
   useEffect(() => {

public/app/features/transformers/suggestionsInput/SuggestionsInput.tsx

@@ -77,7 +77,7 @@ export const SuggestionsInput = ({
   const theme = useTheme2();
   const styles = getStyles(theme, inputHeight);
 
-  const inputRef = useRef<HTMLInputElement | HTMLTextAreaElement>();
+  const inputRef = useRef<HTMLInputElement | HTMLTextAreaElement>(null);
 
   useEffect(() => {
     scrollRef.current?.scrollTo(0, scrollTop);

public/app/features/variables/pickers/shared/VariableOptions.tsx

@@ -11,7 +11,7 @@ import checkboxWhitePng from 'img/checkbox_white.png';
 
 import { ALL_VARIABLE_VALUE } from '../../constants';
 
-export interface Props extends React.HTMLProps<HTMLUListElement>, Themeable2 {
+export interface Props extends Omit<React.HTMLProps<HTMLUListElement>, 'onToggle'>, Themeable2 {
   multi: boolean;
   values: VariableOption[];
   selectedValues: VariableOption[];

public/app/plugins/datasource/azuremonitor/package.json

@@ -18,8 +18,8 @@
     "lodash": "4.17.21",
     "monaco-editor": "0.34.1",
     "prismjs": "1.30.0",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
+    "react": "19.2.0",
+    "react-dom": "19.2.0",
     "react-select": "5.10.2",
     "react-use": "17.6.0",
     "rxjs": "7.8.2",
@@ -36,8 +36,8 @@
     "@types/lodash": "4.17.20",
     "@types/node": "24.10.1",
     "@types/prismjs": "1.26.5",
-    "@types/react": "18.3.18",
-    "@types/react-dom": "18.3.5",
+    "@types/react": "19.2.7",
+    "@types/react-dom": "19.2.3",
     "i18next-cli": "^1.24.22",
     "jest": "29.7.0",
     "react-select-event": "5.5.1",

public/app/plugins/datasource/cloud-monitoring/package.json

@@ -18,8 +18,8 @@
     "lodash": "4.17.21",
     "monaco-editor": "0.34.1",
     "prismjs": "1.30.0",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
+    "react": "19.2.0",
+    "react-dom": "19.2.0",
     "react-select": "5.10.2",
     "react-use": "17.6.0",
     "rxjs": "7.8.2",
@@ -37,8 +37,8 @@
     "@types/lodash": "4.17.20",
     "@types/node": "24.10.1",
     "@types/prismjs": "1.26.5",
-    "@types/react": "18.3.18",
-    "@types/react-dom": "18.3.5",
+    "@types/react": "19.2.7",
+    "@types/react-dom": "19.2.3",
     "jest": "29.7.0",
     "react-select-event": "5.5.1",
     "ts-node": "10.9.2",

public/app/plugins/datasource/cloudwatch/components/QueryEditor/LogsQueryEditor/code-editors/LogsQLCodeEditor.tsx

@@ -20,8 +20,8 @@ interface CodeEditorProps {
 export const LogsQLCodeEditor = (props: CodeEditorProps) => {
   const { query, datasource, onChange } = props;
 
-  const monacoRef = useRef<Monaco>();
-  const disposalRef = useRef<monacoType.IDisposable>();
+  const monacoRef = useRef<Monaco>(null);
+  const disposalRef = useRef<monacoType.IDisposable>(undefined);
 
   const onFocus = useCallback(async () => {
     disposalRef.current = await reRegisterCompletionProvider(

public/app/plugins/datasource/cloudwatch/components/QueryEditor/LogsQueryEditor/code-editors/PPLQueryEditor.tsx

@@ -42,8 +42,8 @@ interface LogsCodeEditorProps {
 export const PPLQueryEditor = (props: LogsCodeEditorProps) => {
   const { query, datasource, onChange } = props;
 
-  const monacoRef = useRef<Monaco>();
-  const disposalRef = useRef<monacoType.IDisposable>();
+  const monacoRef = useRef<Monaco>(null);
+  const disposalRef = useRef<monacoType.IDisposable>(undefined);
 
   const onFocus = useCallback(async () => {
     disposalRef.current = await reRegisterCompletionProvider(

public/app/plugins/datasource/cloudwatch/components/QueryEditor/LogsQueryEditor/code-editors/SQLCodeEditor.tsx

@@ -20,8 +20,8 @@ interface SQLCodeEditorProps {
 export const SQLQueryEditor = (props: SQLCodeEditorProps) => {
   const { query, datasource, onChange } = props;
 
-  const monacoRef = useRef<Monaco>();
-  const disposalRef = useRef<monacoType.IDisposable>();
+  const monacoRef = useRef<Monaco>(null);
+  const disposalRef = useRef<monacoType.IDisposable>(undefined);
 
   const onFocus = useCallback(async () => {
     disposalRef.current = await reRegisterCompletionProvider(

public/app/plugins/datasource/cloudwatch/components/QueryEditor/QueryEditor.test.tsx

@@ -1,4 +1,4 @@
-import { render, screen, waitFor } from '@testing-library/react';
+import { act, render, screen, waitFor } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import { selectOptionInTest } from 'test/helpers/selectOptionInTest';
 
@@ -347,7 +347,9 @@ describe('QueryEditor should render right editor', () => {
     it('should have an account selector when the feature is enabled', async () => {
       config.featureToggles.cloudWatchCrossAccountQuerying = true;
       props.datasource.resources.getAccounts = jest.fn().mockResolvedValue(['account123']);
-      render(<QueryEditor {...props} query={validMetricQueryBuilderQuery} />);
+      // TODO investigate why we need act
+      // see https://github.com/testing-library/react-testing-library/issues/1375
+      await act(async () => render(<QueryEditor {...props} query={validMetricQueryBuilderQuery} />));
       await screen.findByText('Metric Insights');
       expect(await screen.findByText('Account')).toBeInTheDocument();
     });

public/app/plugins/datasource/elasticsearch/components/QueryEditor/ElasticsearchQueryContext.test.tsx

@@ -46,11 +46,9 @@ describe('ElasticsearchQueryContext', () => {
   // the following applies to all hooks in ElasticsearchQueryContext as they all share the same code.
   describe('useQuery Hook', () => {
     it('Should throw when used outside of ElasticsearchQueryContext', () => {
-      jest.spyOn(console, 'error').mockImplementation(() => {});
       expect(() => {
         renderHook(() => useQuery());
       }).toThrow();
-      expect(console.error).toHaveBeenCalled();
     });
 
     it('Should return the current query object', () => {

public/app/plugins/datasource/elasticsearch/hooks/useStatelessReducer.test.tsx

@@ -33,11 +33,9 @@ describe('useStatelessReducer Hook', () => {
 
 describe('useDispatch Hook', () => {
   it('Should throw when used outside of DispatchContext', () => {
-    jest.spyOn(console, 'error').mockImplementation(() => {});
     expect(() => {
       renderHook(() => useDispatch());
     }).toThrow();
-    expect(console.error).toHaveBeenCalled();
   });
 
   it('Should return a dispatch function', () => {

public/app/plugins/datasource/grafana-postgresql-datasource/package.json

@@ -11,7 +11,7 @@
     "@grafana/sql": "12.4.0-pre",
     "@grafana/ui": "12.4.0-pre",
     "lodash": "4.17.21",
-    "react": "18.3.1",
+    "react": "19.2.0",
     "rxjs": "7.8.2",
     "tslib": "2.8.1"
   },
@@ -24,7 +24,7 @@
     "@types/jest": "29.5.14",
     "@types/lodash": "4.17.20",
     "@types/node": "24.10.1",
-    "@types/react": "18.3.18",
+    "@types/react": "19.2.7",
     "jest": "29.7.0",
     "ts-node": "10.9.2",
     "typescript": "5.9.2",

public/app/plugins/datasource/grafana-pyroscope-datasource/QueryEditor/LabelsEditor.tsx

@@ -94,7 +94,7 @@ const EDITOR_HEIGHT_OFFSET = 2;
  * Hook that returns function that will set up monaco autocomplete for the label selector
  */
 function useAutocomplete(getLabelValues: (label: string) => Promise<string[]>, labels?: string[]) {
-  const providerRef = useRef<CompletionProvider>();
+  const providerRef = useRef<CompletionProvider>(null);
   if (providerRef.current === undefined) {
     providerRef.current = new CompletionProvider();
   }

public/app/plugins/datasource/grafana-pyroscope-datasource/package.json

@@ -13,8 +13,8 @@
     "lodash": "4.17.21",
     "monaco-editor": "0.34.1",
     "prismjs": "1.30.0",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
+    "react": "19.2.0",
+    "react-dom": "19.2.0",
     "react-use": "17.6.0",
     "rxjs": "7.8.2",
     "tslib": "2.8.1"
@@ -29,8 +29,8 @@
     "@types/lodash": "4.17.20",
     "@types/node": "24.10.1",
     "@types/prismjs": "1.26.5",
-    "@types/react": "18.3.18",
-    "@types/react-dom": "18.3.5",
+    "@types/react": "19.2.7",
+    "@types/react-dom": "19.2.3",
     "css-loader": "7.1.2",
     "jest": "29.7.0",
     "style-loader": "4.0.0",

public/app/plugins/datasource/grafana-testdata-datasource/package.json

@@ -12,8 +12,8 @@
     "d3-random": "^3.0.1",
     "lodash": "4.17.21",
     "micro-memoize": "^4.1.2",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
+    "react": "19.2.0",
+    "react-dom": "19.2.0",
     "react-select": "5.10.2",
     "react-use": "17.6.0",
     "rxjs": "7.8.2",
@@ -31,8 +31,8 @@
     "@types/jest": "29.5.14",
     "@types/lodash": "4.17.20",
     "@types/node": "24.10.1",
-    "@types/react": "18.3.18",
-    "@types/react-dom": "18.3.5",
+    "@types/react": "19.2.7",
+    "@types/react-dom": "19.2.3",
     "@types/uuid": "10.0.0",
     "jest": "29.7.0",
     "ts-node": "10.9.2",

public/app/plugins/datasource/graphite/package.json

@@ -13,8 +13,8 @@
     "@reduxjs/toolkit": "2.10.1",
     "lodash": "4.17.21",
     "moment": "2.30.1",
-    "react": "18.3.1",
-    "react-dom": "18.3.1",
+    "react": "19.2.0",
+    "react-dom": "19.2.0",
     "react-use": "17.6.0",
     "redux": "5.0.1",
     "rxjs": "7.8.2",
@@ -32,8 +32,8 @@
     "@types/jest": "29.5.14",
     "@types/lodash": "4.17.20",
     "@types/node": "24.10.1",
-    "@types/react": "18.3.18",
-    "@types/react-dom": "18.3.5",
+    "@types/react": "19.2.7",
+    "@types/react-dom": "19.2.3",
     "@types/semver": "7.7.1",
     "@types/uuid": "10.0.0",
     "jest": "29.7.0",