upgrade react-script to v4

Signed-off-by: Augustin Husson <husson.augustin@gmail.com>

web/ui/react-app/.eslintrc.json

@@ -6,7 +6,6 @@
     "plugin:prettier/recommended"
   ],
   "rules": {
-    "@typescript-eslint/camelcase": "warn",
     "@typescript-eslint/explicit-function-return-type": ["off"],
     "eol-last": [
       "error",
@@ -26,7 +25,6 @@
       }
     ]
   },
-  "plugins": [
+  "plugins": ["prettier"],
-    "prettier"
+  "ignorePatterns": ["src/vendor/**"]
-  ]
 }

web/ui/react-app/package.json

@@ -24,7 +24,6 @@
     "codemirror-promql": "^0.17.0",
     "css.escape": "^1.5.1",
     "downshift": "^3.4.8",
-    "enzyme-to-json": "^3.4.3",
     "i": "^0.3.6",
     "jquery": "^3.5.1",
     "jquery.flot.tooltip": "^0.9.0",
@@ -37,20 +36,18 @@
     "react-dom": "^16.7.0",
     "react-resize-detector": "^5.0.7",
     "react-router-dom": "^5.2.1",
-    "react-scripts": "3.4.4",
     "react-test-renderer": "^16.9.0",
     "reactstrap": "^8.9.0",
     "sanitize-html": "^2.3.3",
     "sass": "1.32.10",
     "tempusdominus-bootstrap-4": "^5.1.2",
     "tempusdominus-core": "^5.0.3",
-    "typescript": "^3.3.3",
     "use-media": "^1.4.0"
   },
   "scripts": {
     "start": "react-scripts start",
     "build": "react-scripts build",
-    "test": "react-scripts test --runInBand",
+    "test": "react-scripts test --runInBand --resetMocks=false",
     "test:debug": "react-scripts --inspect-brk test --runInBand --no-cache",
     "eject": "react-scripts eject",
     "lint:ci": "eslint --quiet \"src/**/*.{ts,tsx}\"",
@@ -84,23 +81,18 @@
     "@types/reactstrap": "^8.7.2",
     "@types/sanitize-html": "^1.20.2",
     "@types/sinon": "^9.0.4",
-    "@typescript-eslint/eslint-plugin": "2.x",
-    "@typescript-eslint/parser": "2.x",
     "enzyme": "^3.10.0",
     "enzyme-adapter-react-16": "^1.15.1",
-    "eslint": "6.x",
+    "enzyme-to-json": "^3.4.3",
-    "eslint-config-prettier": "^6.4.0",
+    "eslint-config-prettier": "^8.3.0",
-    "eslint-config-react-app": "^5.0.2",
+    "eslint-config-react-app": "^6.0.0",
-    "eslint-plugin-flowtype": "4.x",
+    "eslint-plugin-prettier": "^4.0.0",
-    "eslint-plugin-import": "2.x",
-    "eslint-plugin-jsx-a11y": "6.x",
-    "eslint-plugin-prettier": "^3.1.1",
-    "eslint-plugin-react": "7.x",
-    "eslint-plugin-react-hooks": "2.x",
     "jest-fetch-mock": "^3.0.3",
     "mutationobserver-shim": "^0.3.7",
-    "prettier": "^1.18.2",
+    "prettier": "^2.3.2",
-    "sinon": "^9.0.3"
+    "react-scripts": "4.0.3",
+    "sinon": "^9.0.3",
+    "typescript": "^3.3.3"
   },
   "proxy": "http://localhost:9090",
   "jest": {

web/ui/react-app/src/App.test.tsx

@@ -33,7 +33,7 @@ describe('App', () => {
       TargetsPage,
       TSDBStatusPage,
       PanelListPage,
-    ].forEach(component => {
+    ].forEach((component) => {
       const c = app.find(component);
       expect(c).toHaveLength(1);
     });

web/ui/react-app/src/components/Checkbox.test.tsx

@@ -8,7 +8,7 @@ const MockCmp: React.FC = () => <div className="mock" />;
 describe('Checkbox', () => {
   it('renders with subcomponents', () => {
     const checkBox = shallow(<Checkbox />);
-    [FormGroup, Input, Label].forEach(component => expect(checkBox.find(component)).toHaveLength(1));
+    [FormGroup, Input, Label].forEach((component) => expect(checkBox.find(component)).toHaveLength(1));
   });
 
   it('passes down the correct FormGroup props', () => {

web/ui/react-app/src/components/ToggleMoreLess.test.tsx

@@ -23,11 +23,6 @@ describe('ToggleMoreLess', () => {
 
   it('renders a show less btn if clicked', () => {
     tggleBtn.find(Button).simulate('click');
-    expect(
+    expect(tggleBtn.find(Button).render().text()).toEqual('show less');
-      tggleBtn
-        .find(Button)
-        .render()
-        .text()
-    ).toEqual('show less');
   });
 });

web/ui/react-app/src/components/withStartingIndicator.tsx

@@ -23,17 +23,17 @@ export const StartingContent: FC<StartingContentProps> = ({ status, isUnexpected
     <div className="text-center m-3">
       <div className="m-4">
         <h2>Starting up...</h2>
-        {status?.max! > 0 ? (
+        {status && status.max > 0 ? (
           <div>
             <p>
-              Replaying WAL ({status?.current}/{status?.max})
+              Replaying WAL ({status.current}/{status.max})
             </p>
             <Progress
               animated
-              value={status?.current! - status?.min! + 1}
+              value={status.current - status.min + 1}
-              min={status?.min}
+              min={status.min}
-              max={status?.max! - status?.min! + 1}
+              max={status.max - status.min + 1}
-              color={status?.max === status?.current ? 'success' : undefined}
+              color={status.max === status.current ? 'success' : undefined}
               style={{ width: '10%', margin: 'auto' }}
             />
           </div>
@@ -43,7 +43,9 @@ export const StartingContent: FC<StartingContentProps> = ({ status, isUnexpected
   );
 };
 
-export const withStartingIndicator = <T extends {}>(Page: ComponentType<T>): FC<T> => ({ ...rest }) => {
+export const withStartingIndicator =
+  <T extends Record<string, unknown>>(Page: ComponentType<T>): FC<T> =>
+  ({ ...rest }) => {
     const pathPrefix = usePathPrefix();
     const { ready, walReplayStatus, isUnexpected } = useFetchReadyInterval(pathPrefix);
 
@@ -52,4 +54,4 @@ export const withStartingIndicator = <T extends {}>(Page: ComponentType<T>): FC<
     }
 
     return <StartingContent isUnexpected={isUnexpected} status={walReplayStatus.data} />;
-};
+  };

web/ui/react-app/src/components/withStatusIndicator.tsx

@@ -10,13 +10,11 @@ interface StatusIndicatorProps {
   componentTitle?: string;
 }
 
-export const withStatusIndicator = <T extends {}>(Component: ComponentType<T>): FC<StatusIndicatorProps & T> => ({
+export const withStatusIndicator =
-  error,
+  <T extends Record<string, any>>( // eslint-disable-line @typescript-eslint/no-explicit-any
-  isLoading,
+    Component: ComponentType<T>
-  customErrorMsg,
+  ): FC<StatusIndicatorProps & T> =>
-  componentTitle,
+  ({ error, isLoading, customErrorMsg, componentTitle, ...rest }) => {
-  ...rest
-}) => {
     if (error) {
       return (
         <Alert color="danger">
@@ -43,4 +41,4 @@ export const withStatusIndicator = <T extends {}>(Component: ComponentType<T>):
       );
     }
     return <Component {...(rest as T)} />;
-};
+  };

web/ui/react-app/src/contexts/PathPrefixContext.tsx

@@ -2,7 +2,7 @@ import React from 'react';
 
 const PathPrefixContext = React.createContext('');
 
-function usePathPrefix() {
+function usePathPrefix(): string {
   return React.useContext(PathPrefixContext);
 }
 

web/ui/react-app/src/contexts/ThemeContext.tsx

@@ -17,6 +17,6 @@ export const ThemeContext = React.createContext<ThemeCtx>({
   setTheme: (s: themeSetting) => {},
 });
 
-export const useTheme = () => {
+export const useTheme = (): ThemeCtx => {
   return React.useContext(ThemeContext);
 };

web/ui/react-app/src/globals.ts

@@ -1,4 +1,6 @@
 import jquery from 'jquery';
 
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
 (window as any).jQuery = jquery;
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
 (window as any).moment = require('moment');

web/ui/react-app/src/hooks/useFetch.ts

@@ -10,19 +10,15 @@ export interface FetchState<T> {
   isLoading: boolean;
 }
 
-export interface FetchStateReady {
-  ready: boolean;
-  isUnexpected: boolean;
-  isLoading: boolean;
-}
-
 export interface FetchStateReadyInterval {
   ready: boolean;
   isUnexpected: boolean;
   walReplayStatus: WALReplayStatus;
 }
 
-export const useFetch = <T extends {}>(url: string, options?: RequestInit): FetchState<T> => {
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const useFetch = <T extends Record<string, any>>(url: string, options?: RequestInit): FetchState<T> => {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   const [response, setResponse] = useState<APIResponse<T>>({ status: 'start fetching' } as any);
   const [error, setError] = useState<Error>();
   const [isLoading, setIsLoading] = useState<boolean>(true);
@@ -54,6 +50,7 @@ let wasReady = false;
 export const useFetchReadyInterval = (pathPrefix: string, options?: RequestInit): FetchStateReadyInterval => {
   const [ready, setReady] = useState<boolean>(false);
   const [isUnexpected, setIsUnexpected] = useState<boolean>(false);
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   const [walReplayStatus, setWALReplayStatus] = useState<WALReplayStatus>({} as any);
 
   useEffect(() => {

web/ui/react-app/src/pages/alerts/AlertContents.test.tsx

@@ -21,7 +21,7 @@ describe('AlertsContent', () => {
     { selector: '#inactive-toggler', propName: 'inactive' },
     { selector: '#pending-toggler', propName: 'pending' },
     { selector: '#firing-toggler', propName: 'firing' },
-  ].forEach(testCase => {
+  ].forEach((testCase) => {
     it(`toggles the ${testCase.propName} checkbox from true to false when clicked and back to true when clicked again`, () => {
       expect(wrapper.find(testCase.selector).prop('checked')).toBe(true);
       wrapper.find(testCase.selector).simulate('change', { target: { checked: false } });

web/ui/react-app/src/pages/alerts/AlertContents.tsx

@@ -6,6 +6,7 @@ import { isPresent } from '../../utils';
 import { Rule } from '../../types/types';
 import { useLocalStorage } from '../../hooks/useLocalStorage';
 
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
 export type RuleState = keyof RuleStatus<any>;
 
 export interface RuleStatus<T> {
@@ -83,7 +84,7 @@ const AlertsContent: FC<AlertsProps> = ({ groups = [], statsCount }) => {
         </Checkbox>
       </div>
       {groups.map((group, i) => {
-        const hasFilterOn = group.rules.some(rule => filter[rule.state]);
+        const hasFilterOn = group.rules.some((rule) => filter[rule.state]);
         return hasFilterOn ? (
           <Fragment key={i}>
             <GroupInfo rules={group.rules}>
@@ -108,6 +109,7 @@ interface GroupInfoProps {
 }
 
 export const GroupInfo: FC<GroupInfoProps> = ({ rules, children }) => {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   const statesCounter = rules.reduce<any>(
     (acc, r) => {
       return {

web/ui/react-app/src/pages/alerts/Alerts.tsx

@@ -18,7 +18,7 @@ const Alerts: FC = () => {
   };
 
   if (response.data && response.data.groups) {
-    response.data.groups.forEach(el => el.rules.forEach(r => ruleStatsCount[r.state]++));
+    response.data.groups.forEach((el) => el.rules.forEach((r) => ruleStatsCount[r.state]++));
   }
 
   return <AlertsWithStatusIndicator {...response.data} statsCount={ruleStatsCount} error={error} isLoading={isLoading} />;

web/ui/react-app/src/pages/config/Config.tsx

@@ -27,7 +27,7 @@ export const ConfigContent: FC<ConfigContentProps> = ({ error, data }) => {
       <h2>
         Configuration&nbsp;
         <CopyToClipboard
-          text={config!}
+          text={config ? config : ''}
           onCopy={(_, result) => {
             setCopied(result);
             setTimeout(setCopied, 1500);

web/ui/react-app/src/pages/flags/Flags.test.tsx

@@ -67,11 +67,7 @@ describe('Flags', () => {
 
   it('is sorted by flag by default', (): void => {
     const w = shallow(<FlagsContent data={sampleFlagsResponse} />);
-    const td = w
+    const td = w.find('tbody').find('td').find('span').first();
-      .find('tbody')
-      .find('td')
-      .find('span')
-      .first();
     expect(td.html()).toBe('<span>--alertmanager.notification-queue-capacity</span>');
   });
 
@@ -82,11 +78,7 @@ describe('Flags', () => {
       .find('td')
       .filterWhere((td): boolean => td.hasClass('Flag'));
     th.simulate('click');
-    const td = w
+    const td = w.find('tbody').find('td').find('span').first();
-      .find('tbody')
-      .find('td')
-      .find('span')
-      .first();
     expect(td.html()).toBe('<span>--web.user-assets</span>');
   });
 
@@ -97,7 +89,7 @@ describe('Flags', () => {
     const tds = w
       .find('tbody')
       .find('td')
-      .filterWhere(code => code.hasClass('flag-item'));
+      .filterWhere((code) => code.hasClass('flag-item'));
     expect(tds.length).toEqual(3);
   });
 
@@ -108,7 +100,7 @@ describe('Flags', () => {
     const tds = w
       .find('tbody')
       .find('td')
-      .filterWhere(code => code.hasClass('flag-value'));
+      .filterWhere((code) => code.hasClass('flag-value'));
     expect(tds.length).toEqual(1);
   });
 });

web/ui/react-app/src/pages/flags/Flags.tsx

@@ -21,15 +21,14 @@ interface FlagsProps {
   data?: FlagMap;
 }
 
-const compareAlphaFn = (keys: boolean, reverse: boolean) => (
+const compareAlphaFn =
-  [k1, v1]: [string, string],
+  (keys: boolean, reverse: boolean) =>
-  [k2, v2]: [string, string]
+  ([k1, v1]: [string, string], [k2, v2]: [string, string]): number => {
-): number => {
     const a = keys ? k1 : v1;
     const b = keys ? k2 : v2;
     const reverser = reverse ? -1 : 1;
     return reverser * a.localeCompare(b);
-};
+  };
 
 const getSortIcon = (b: boolean | undefined): IconDefinition => {
   if (b === undefined) {

web/ui/react-app/src/pages/graph/CMExpressionInput.test.tsx

@@ -33,14 +33,14 @@ describe('CMExpressionInput', () => {
   });
 
   it('renders a search icon when it is not loading', () => {
-    const addon = expressionInput.find(InputGroupAddon).filterWhere(addon => addon.prop('addonType') === 'prepend');
+    const addon = expressionInput.find(InputGroupAddon).filterWhere((addon) => addon.prop('addonType') === 'prepend');
     const icon = addon.find(FontAwesomeIcon);
     expect(icon.prop('icon')).toEqual(faSearch);
   });
 
   it('renders a loading icon when it is loading', () => {
     const expressionInput = mount(<CMExpressionInput {...expressionInputProps} loading={true} />);
-    const addon = expressionInput.find(InputGroupAddon).filterWhere(addon => addon.prop('addonType') === 'prepend');
+    const addon = expressionInput.find(InputGroupAddon).filterWhere((addon) => addon.prop('addonType') === 'prepend');
     const icon = addon.find(FontAwesomeIcon);
     expect(icon.prop('icon')).toEqual(faSpinner);
     expect(icon.prop('spin')).toBe(true);
@@ -52,11 +52,8 @@ describe('CMExpressionInput', () => {
   });
 
   it('renders an execute button', () => {
-    const addon = expressionInput.find(InputGroupAddon).filterWhere(addon => addon.prop('addonType') === 'append');
+    const addon = expressionInput.find(InputGroupAddon).filterWhere((addon) => addon.prop('addonType') === 'append');
-    const button = addon
+    const button = addon.find(Button).find('.execute-btn').first();
-      .find(Button)
-      .find('.execute-btn')
-      .first();
     expect(button.prop('color')).toEqual('primary');
     expect(button.text()).toEqual('Execute');
   });
@@ -65,7 +62,7 @@ describe('CMExpressionInput', () => {
     const spyExecuteQuery = jest.fn();
     const props = { ...expressionInputProps, executeQuery: spyExecuteQuery };
     const wrapper = mount(<CMExpressionInput {...props} />);
-    const btn = wrapper.find(Button).filterWhere(btn => btn.hasClass('execute-btn'));
+    const btn = wrapper.find(Button).filterWhere((btn) => btn.hasClass('execute-btn'));
     btn.simulate('click');
     expect(spyExecuteQuery).toHaveBeenCalledTimes(1);
   });

web/ui/react-app/src/pages/graph/CMExpressionInput.tsx

@@ -49,7 +49,7 @@ export class HistoryCompleteStrategy implements CompleteStrategy {
   }
 
   promQL(context: CompletionContext): Promise<CompletionResult | null> | CompletionResult | null {
-    return Promise.resolve(this.complete.promQL(context)).then(res => {
+    return Promise.resolve(this.complete.promQL(context)).then((res) => {
       const { state, pos } = context;
       const tree = syntaxTree(state).resolve(pos, -1);
       const start = res != null ? res.from : tree.from;
@@ -61,7 +61,7 @@ export class HistoryCompleteStrategy implements CompleteStrategy {
       const historyItems: CompletionResult = {
         from: start,
         to: pos,
-        options: this.queryHistory.map(q => ({
+        options: this.queryHistory.map((q) => ({
           label: q.length < 80 ? q : q.slice(0, 76).concat('...'),
           detail: 'past query',
           apply: q,

web/ui/react-app/src/pages/graph/DataTable.test.tsx

@@ -69,12 +69,7 @@ describe('DataTable', () => {
       const table = dataTable.find(Table);
       table.find('tr').forEach((row, idx) => {
         expect(row.find(SeriesName)).toHaveLength(1);
-        expect(
+        expect(row.find('td').at(1).text()).toEqual(`${idx}`);
-          row
-            .find('td')
-            .at(1)
-            .text()
-        ).toEqual(`${idx}`);
       });
     });
   });
@@ -83,7 +78,7 @@ describe('DataTable', () => {
     const dataTableProps: QueryResult = {
       data: {
         resultType: 'vector',
-        result: Array.from(Array(10001).keys()).map(i => {
+        result: Array.from(Array(10001).keys()).map((i) => {
           return {
             metric: {
               __name__: `metric_name_${i}`,
@@ -104,12 +99,7 @@ describe('DataTable', () => {
 
     it('renders a warning', () => {
       const alerts = dataTable.find(Alert);
-      expect(
+      expect(alerts.first().render().text()).toEqual('Warning: Fetched 10001 metrics, only displaying first 10000.');
-        alerts
-          .first()
-          .render()
-          .text()
-      ).toEqual('Warning: Fetched 10001 metrics, only displaying first 10000.');
     });
   });
 
@@ -117,7 +107,7 @@ describe('DataTable', () => {
     const dataTableProps: QueryResult = {
       data: {
         resultType: 'vector',
-        result: Array.from(Array(1001).keys()).map(i => {
+        result: Array.from(Array(1001).keys()).map((i) => {
           return {
             metric: {
               __name__: `metric_name_${i}`,
@@ -133,12 +123,9 @@ describe('DataTable', () => {
 
     it('renders a warning', () => {
       const alerts = dataTable.find(Alert);
-      expect(
+      expect(alerts.first().render().text()).toEqual(
-        alerts
+        'Notice: Showing more than 1000 series, turning off label formatting for performance reasons.'
-          .first()
+      );
-          .render()
-          .text()
-      ).toEqual('Notice: Showing more than 1000 series, turning off label formatting for performance reasons.');
     });
   });
 

web/ui/react-app/src/pages/graph/DataTable.tsx

@@ -62,8 +62,7 @@ const DataTable: FC<QueryResult> = ({ data }) => {
   const doFormat = data.result.length <= maxFormattableSize;
   switch (data.resultType) {
     case 'vector':
-      rows = (limitSeries(data.result) as InstantSample[]).map(
+      rows = (limitSeries(data.result) as InstantSample[]).map((s: InstantSample, index: number): ReactNode => {
-        (s: InstantSample, index: number): ReactNode => {
         return (
           <tr key={index}>
             <td>
@@ -72,14 +71,13 @@ const DataTable: FC<QueryResult> = ({ data }) => {
             <td>{s.value[1]}</td>
           </tr>
         );
-        }
+      });
-      );
       limited = rows.length !== data.result.length;
       break;
     case 'matrix':
       rows = (limitSeries(data.result) as RangeSamples[]).map((s, index) => {
         const valueText = s.values
-          .map(v => {
+          .map((v) => {
             return v[1] + ' @' + v[0];
           })
           .join('\n');

web/ui/react-app/src/pages/graph/ExpressionInput.test.tsx

@@ -47,14 +47,14 @@ describe('ExpressionInput', () => {
   });
 
   it('renders a search icon when it is not loading', () => {
-    const addon = expressionInput.find(InputGroupAddon).filterWhere(addon => addon.prop('addonType') === 'prepend');
+    const addon = expressionInput.find(InputGroupAddon).filterWhere((addon) => addon.prop('addonType') === 'prepend');
     const icon = addon.find(FontAwesomeIcon);
     expect(icon.prop('icon')).toEqual(faSearch);
   });
 
   it('renders a loading icon when it is loading', () => {
     const expressionInput = mount(<ExpressionInput {...expressionInputProps} loading={true} />);
-    const addon = expressionInput.find(InputGroupAddon).filterWhere(addon => addon.prop('addonType') === 'prepend');
+    const addon = expressionInput.find(InputGroupAddon).filterWhere((addon) => addon.prop('addonType') === 'prepend');
     const icon = addon.find(FontAwesomeIcon);
     expect(icon.prop('icon')).toEqual(faSpinner);
     expect(icon.prop('spin')).toBe(true);
@@ -75,7 +75,7 @@ describe('ExpressionInput', () => {
       const downshift = expressionInput.find(Downshift);
       const input = downshift.find(Input);
       downshift.setState({ isOpen: false });
-      ['Home', 'End', 'ArrowUp', 'ArrowDown'].forEach(key => {
+      ['Home', 'End', 'ArrowUp', 'ArrowDown'].forEach((key) => {
         const event = getKeyEvent(key);
         input.simulate('keydown', event);
         const nativeEvent = event.nativeEvent as any;
@@ -122,7 +122,7 @@ describe('ExpressionInput', () => {
       const spyExecuteQuery = jest.fn();
       const props = { ...expressionInputProps, executeQuery: spyExecuteQuery };
       const wrapper = mount(<ExpressionInput {...props} />);
-      const btn = wrapper.find(Button).filterWhere(btn => btn.hasClass('execute-btn'));
+      const btn = wrapper.find(Button).filterWhere((btn) => btn.hasClass('execute-btn'));
       btn.simulate('click');
       expect(spyExecuteQuery).toHaveBeenCalledTimes(1);
     });
@@ -226,7 +226,7 @@ describe('ExpressionInput', () => {
       const downshift = expressionInput.find(Downshift);
       const input = downshift.find(Input);
       downshift.setState({ isOpen: true });
-      ['ArrowUp', 'ArrowDown'].forEach(key => {
+      ['ArrowUp', 'ArrowDown'].forEach((key) => {
         const event = getKeyEvent(key);
         input.simulate('keydown', event);
         const nativeEvent = event.nativeEvent as any;
@@ -248,7 +248,7 @@ describe('ExpressionInput', () => {
         const ul = downshift.find('ul');
         expect(ul.prop('className')).toEqual('card list-group');
         const items = ul.find('li');
-        expect(items.map(item => item.text()).join(', ')).toEqual(
+        expect(items.map((item) => item.text()).join(', ')).toEqual(
           'node_cpu_guest_seconds_total, node_cpu_seconds_total, instance:node_cpu_utilisation:rate1m'
         );
       });
@@ -256,11 +256,8 @@ describe('ExpressionInput', () => {
   });
 
   it('renders an execute Button', () => {
-    const addon = expressionInput.find(InputGroupAddon).filterWhere(addon => addon.prop('addonType') === 'append');
+    const addon = expressionInput.find(InputGroupAddon).filterWhere((addon) => addon.prop('addonType') === 'append');
-    const button = addon
+    const button = addon.find(Button).find('.execute-btn').first();
-      .find(Button)
-      .find('.execute-btn')
-      .first();
     expect(button.prop('color')).toEqual('primary');
     expect(button.text()).toEqual('Execute');
   });

web/ui/react-app/src/pages/graph/ExpressionInput.tsx

@@ -1,11 +1,11 @@
 import React, { Component } from 'react';
-import { Button, InputGroup, InputGroupAddon, InputGroupText, Input } from 'reactstrap';
+import { Button, Input, InputGroup, InputGroupAddon, InputGroupText } from 'reactstrap';
 
 import Downshift, { ControllerStateAndHelpers } from 'downshift';
 import sanitizeHTML from 'sanitize-html';
 
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
-import { faSearch, faSpinner, faGlobeEurope } from '@fortawesome/free-solid-svg-icons';
+import { faGlobeEurope, faSearch, faSpinner } from '@fortawesome/free-solid-svg-icons';
 import MetricsExplorer from './MetricsExplorer';
 import { Fuzzy, FuzzyResult } from '@nexucis/fuzzy';
 
@@ -37,34 +37,38 @@ class ExpressionInput extends Component<ExpressionInputProps, ExpressionInputSta
     };
   }
 
-  componentDidMount() {
+  componentDidMount(): void {
     this.setHeight();
   }
 
-  setHeight = () => {
+  setHeight = (): void => {
-    const { offsetHeight, clientHeight, scrollHeight } = this.exprInputRef.current!;
+    if (this.exprInputRef.current) {
+      const { offsetHeight, clientHeight, scrollHeight } = this.exprInputRef.current;
       const offset = offsetHeight - clientHeight; // Needed in order for the height to be more accurate.
       this.setState({ height: scrollHeight + offset });
+    }
   };
 
-  handleInput = () => {
+  handleInput = (): void => {
-    this.setValue(this.exprInputRef.current!.value);
+    if (this.exprInputRef.current) {
+      this.setValue(this.exprInputRef.current.value);
+    }
   };
 
-  setValue = (value: string) => {
+  setValue = (value: string): void => {
     const { onExpressionChange } = this.props;
     onExpressionChange(value);
     this.setState({ height: 'auto' }, this.setHeight);
   };
 
-  componentDidUpdate(prevProps: ExpressionInputProps) {
+  componentDidUpdate(prevProps: ExpressionInputProps): void {
     const { value } = this.props;
     if (value !== prevProps.value) {
       this.setValue(value);
     }
   }
 
-  handleKeyPress = (event: React.KeyboardEvent<HTMLInputElement>) => {
+  handleKeyPress = (event: React.KeyboardEvent<HTMLInputElement>): void => {
     const { executeQuery } = this.props;
     if (event.key === 'Enter' && !event.shiftKey) {
       executeQuery();
@@ -72,11 +76,12 @@ class ExpressionInput extends Component<ExpressionInputProps, ExpressionInputSta
     }
   };
 
-  getSearchMatches = (input: string, expressions: string[]) => {
+  getSearchMatches = (input: string, expressions: string[]): FuzzyResult[] => {
     return fuz.filter(input.replace(/ /g, ''), expressions);
   };
 
-  createAutocompleteSection = (downshift: ControllerStateAndHelpers<any>) => {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  createAutocompleteSection = (downshift: ControllerStateAndHelpers<any>): JSX.Element | null => {
     const { inputValue = '', closeMenu, highlightedIndex } = downshift;
     const autocompleteSections = {
       'Query History': this.props.queryHistory,
@@ -84,9 +89,9 @@ class ExpressionInput extends Component<ExpressionInputProps, ExpressionInputSta
     };
     let index = 0;
     const sections =
-      inputValue!.length && this.props.enableAutocomplete
+      inputValue?.length && this.props.enableAutocomplete
         ? Object.entries(autocompleteSections).reduce((acc, [title, items]) => {
-            const matches = this.getSearchMatches(inputValue!, items);
+            const matches = this.getSearchMatches(inputValue, items);
             return !matches.length
               ? acc
               : [
@@ -94,7 +99,7 @@ class ExpressionInput extends Component<ExpressionInputProps, ExpressionInputSta
                   <ul className="autosuggest-dropdown-list" key={title}>
                     <li className="autosuggest-dropdown-header">{title}</li>
                     {matches
-                      .slice(0, 100) // Limit DOM rendering to 100 results, as DOM rendering is sloooow.
+                      .slice(0, 100) // Limit DOM rendering to 100 results, as DOM rendering is slow.
                       .map((result: FuzzyResult) => {
                         const itemProps = downshift.getItemProps({
                           key: result.original,
@@ -131,19 +136,19 @@ class ExpressionInput extends Component<ExpressionInputProps, ExpressionInputSta
     );
   };
 
-  openMetricsExplorer = () => {
+  openMetricsExplorer = (): void => {
     this.setState({
       showMetricsExplorer: true,
     });
   };
 
-  updateShowMetricsExplorer = (show: boolean) => {
+  updateShowMetricsExplorer = (show: boolean): void => {
     this.setState({
       showMetricsExplorer: show,
     });
   };
 
-  insertAtCursor = (value: string) => {
+  insertAtCursor = (value: string): void => {
     if (!this.exprInputRef.current) return;
 
     const startPosition = this.exprInputRef.current.selectionStart;
@@ -161,13 +166,13 @@ class ExpressionInput extends Component<ExpressionInputProps, ExpressionInputSta
     this.setValue(newValue);
   };
 
-  render() {
+  render(): JSX.Element {
     const { executeQuery, value } = this.props;
     const { height } = this.state;
     return (
       <>
         <Downshift onSelect={this.setValue}>
-          {downshift => (
+          {(downshift) => (
             <div>
               <InputGroup className="expression-input">
                 <InputGroupAddon addonType="prepend">
@@ -191,11 +196,13 @@ class ExpressionInput extends Component<ExpressionInputProps, ExpressionInputSta
                         case 'End':
                           // We want to be able to jump to the beginning/end of the input field.
                           // By default, Downshift otherwise jumps to the first/last suggestion item instead.
+                          // eslint-disable-next-line @typescript-eslint/no-explicit-any
                           (event.nativeEvent as any).preventDownshiftDefault = true;
                           break;
                         case 'ArrowUp':
                         case 'ArrowDown':
                           if (!downshift.isOpen) {
+                            // eslint-disable-next-line @typescript-eslint/no-explicit-any
                             (event.nativeEvent as any).preventDownshiftDefault = true;
                           }
                           break;
@@ -203,13 +210,14 @@ class ExpressionInput extends Component<ExpressionInputProps, ExpressionInputSta
                           downshift.closeMenu();
                           break;
                         case 'Escape':
-                          if (!downshift.isOpen) {
+                          if (!downshift.isOpen && this.exprInputRef.current) {
-                            this.exprInputRef.current!.blur();
+                            this.exprInputRef.current.blur();
                           }
                           break;
                         default:
                       }
                     },
+                    // eslint-disable-next-line @typescript-eslint/no-explicit-any
                   } as any)}
                   value={value}
                 />

web/ui/react-app/src/pages/graph/Graph.test.tsx

@@ -78,9 +78,9 @@ describe('Graph', () => {
     };
     it('renders a graph with props', () => {
       const graph = shallow(<Graph {...props} />);
-      const div = graph.find('div').filterWhere(elem => elem.prop('className') === 'graph-test');
+      const div = graph.find('div').filterWhere((elem) => elem.prop('className') === 'graph-test');
       const resize = div.find(ReactResizeDetector);
-      const innerdiv = div.find('div').filterWhere(elem => elem.prop('className') === 'graph-chart');
+      const innerdiv = div.find('div').filterWhere((elem) => elem.prop('className') === 'graph-chart');
       expect(resize.prop('handleWidth')).toBe(true);
       expect(div).toHaveLength(1);
       expect(innerdiv).toHaveLength(1);
@@ -264,10 +264,7 @@ describe('Graph', () => {
       );
       (graph.instance() as any).plot(); // create chart
       const spyPlotSetAndDraw = jest.spyOn(graph.instance() as any, 'plotSetAndDraw');
-      graph
+      graph.find('.legend-item').at(0).simulate('mouseover');
-        .find('.legend-item')
-        .at(0)
-        .simulate('mouseover');
       expect(spyPlotSetAndDraw).toHaveBeenCalledTimes(1);
     });
     it('should call spyPlotSetAndDraw with chartDate from state as default value', () => {

web/ui/react-app/src/pages/graph/Graph.tsx

@@ -42,6 +42,7 @@ export interface GraphExemplar {
   seriesLabels: { [key: string]: string };
   labels: { [key: string]: string };
   data: number[][];
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   points: any; // This is used to specify the symbol.
   color: string;
 }
@@ -67,7 +68,7 @@ class Graph extends PureComponent<GraphProps, GraphState> {
     selectedExemplarLabels: { exemplar: {}, series: {} },
   };
 
-  componentDidUpdate(prevProps: GraphProps) {
+  componentDidUpdate(prevProps: GraphProps): void {
     const { data, stacked, useLocalTime, showExemplars } = this.props;
     if (prevProps.data !== data) {
       this.selectedSeriesIndexes = [];
@@ -102,7 +103,7 @@ class Graph extends PureComponent<GraphProps, GraphState> {
     }
   }
 
-  componentDidMount() {
+  componentDidMount(): void {
     this.plot();
 
     $(`.graph-${this.props.id}`).bind('plotclick', (event, pos, item) => {
@@ -130,11 +131,13 @@ class Graph extends PureComponent<GraphProps, GraphState> {
     });
   }
 
-  componentWillUnmount() {
+  componentWillUnmount(): void {
     this.destroyPlot();
   }
 
-  plot = (data: (GraphSeries | GraphExemplar)[] = [...this.state.chartData.series, ...this.state.chartData.exemplars]) => {
+  plot = (
+    data: (GraphSeries | GraphExemplar)[] = [...this.state.chartData.series, ...this.state.chartData.exemplars]
+  ): void => {
     if (!this.chartRef.current) {
       return;
     }
@@ -143,7 +146,7 @@ class Graph extends PureComponent<GraphProps, GraphState> {
     this.$chart = $.plot($(this.chartRef.current), data, getOptions(this.props.stacked, this.props.useLocalTime));
   };
 
-  destroyPlot = () => {
+  destroyPlot = (): void => {
     if (isPresent(this.$chart)) {
       this.$chart.destroy();
     }
@@ -151,21 +154,21 @@ class Graph extends PureComponent<GraphProps, GraphState> {
 
   plotSetAndDraw(
     data: (GraphSeries | GraphExemplar)[] = [...this.state.chartData.series, ...this.state.chartData.exemplars]
-  ) {
+  ): void {
     if (isPresent(this.$chart)) {
       this.$chart.setData(data);
       this.$chart.draw();
     }
   }
 
-  handleSeriesSelect = (selected: number[], selectedIndex: number) => {
+  handleSeriesSelect = (selected: number[], selectedIndex: number): void => {
     const { chartData } = this.state;
     this.plot(
       this.selectedSeriesIndexes.length === 1 && this.selectedSeriesIndexes.includes(selectedIndex)
         ? [...chartData.series.map(toHoverColor(selectedIndex, this.props.stacked)), ...chartData.exemplars]
         : [
             ...chartData.series.filter((_, i) => selected.includes(i)),
-            ...chartData.exemplars.filter(exemplar => {
+            ...chartData.exemplars.filter((exemplar) => {
               series: for (const i in selected) {
                 for (const name in chartData.series[selected[i]].labels) {
                   if (exemplar.seriesLabels[name] !== chartData.series[selected[i]].labels[name]) {
@@ -181,7 +184,7 @@ class Graph extends PureComponent<GraphProps, GraphState> {
     this.selectedSeriesIndexes = selected;
   };
 
-  handleSeriesHover = (index: number) => () => {
+  handleSeriesHover = (index: number) => (): void => {
     if (this.rafID) {
       cancelAnimationFrame(this.rafID);
     }
@@ -193,18 +196,18 @@ class Graph extends PureComponent<GraphProps, GraphState> {
     });
   };
 
-  handleLegendMouseOut = () => {
+  handleLegendMouseOut = (): void => {
     cancelAnimationFrame(this.rafID);
     this.plotSetAndDraw();
   };
 
-  handleResize = () => {
+  handleResize = (): void => {
     if (isPresent(this.$chart)) {
       this.plot(this.$chart.getData() as (GraphSeries | GraphExemplar)[]);
     }
   };
 
-  render() {
+  render(): JSX.Element {
     const { chartData, selectedExemplarLabels } = this.state;
     const selectedLabels = selectedExemplarLabels as {
       exemplar: { [key: string]: string };

web/ui/react-app/src/pages/graph/GraphControls.test.tsx

@@ -3,7 +3,7 @@ import { shallow } from 'enzyme';
 import GraphControls from './GraphControls';
 import { Button, ButtonGroup, Form, InputGroup, InputGroupAddon, Input } from 'reactstrap';
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
-import { faSquare, faPlus, faMinus, faChartArea, faChartLine } from '@fortawesome/free-solid-svg-icons';
+import { faPlus, faMinus, faChartArea, faChartLine } from '@fortawesome/free-solid-svg-icons';
 import TimeInput from './TimeInput';
 
 const defaultGraphControlProps = {
@@ -59,9 +59,9 @@ describe('GraphControls', () => {
         title: 'Increase range',
         icon: faPlus,
       },
-    ].forEach(testCase => {
+    ].forEach((testCase) => {
       const controls = shallow(<GraphControls {...defaultGraphControlProps} />);
-      const addon = controls.find(InputGroupAddon).filterWhere(addon => addon.prop('addonType') === testCase.position);
+      const addon = controls.find(InputGroupAddon).filterWhere((addon) => addon.prop('addonType') === testCase.position);
       const button = addon.find(Button);
       const icon = button.find(FontAwesomeIcon);
       expect(button.prop('title')).toEqual(testCase.title);
@@ -109,7 +109,7 @@ describe('GraphControls', () => {
 
   it('renders a resolution Input with props', () => {
     const controls = shallow(<GraphControls {...defaultGraphControlProps} />);
-    const input = controls.find(Input).filterWhere(input => input.prop('className') === 'resolution-input');
+    const input = controls.find(Input).filterWhere((input) => input.prop('className') === 'resolution-input');
     expect(input.prop('placeholder')).toEqual('Res. (s)');
     expect(input.prop('defaultValue')).toEqual('10');
     expect(input.prop('innerRef')).toEqual({ current: null });
@@ -140,10 +140,10 @@ describe('GraphControls', () => {
         icon: faChartArea,
         active: false,
       },
-    ].forEach(testCase => {
+    ].forEach((testCase) => {
       const controls = shallow(<GraphControls {...defaultGraphControlProps} />);
       const group = controls.find(ButtonGroup);
-      const btn = group.find(Button).filterWhere(btn => btn.prop('title') === testCase.title);
+      const btn = group.find(Button).filterWhere((btn) => btn.prop('title') === testCase.title);
       expect(btn.prop('active')).toEqual(testCase.active);
       const icon = btn.find(FontAwesomeIcon);
       expect(icon.prop('icon')).toEqual(testCase.icon);
@@ -160,14 +160,14 @@ describe('GraphControls', () => {
         title: 'Show stacked graph',
         active: false,
       },
-    ].forEach(testCase => {
+    ].forEach((testCase) => {
       const results: boolean[] = [];
       const onChange = (stacked: boolean): void => {
         results.push(stacked);
       };
       const controls = shallow(<GraphControls {...defaultGraphControlProps} onChangeStacking={onChange} />);
       const group = controls.find(ButtonGroup);
-      const btn = group.find(Button).filterWhere(btn => btn.prop('title') === testCase.title);
+      const btn = group.find(Button).filterWhere((btn) => btn.prop('title') === testCase.title);
       const onClick = btn.prop('onClick');
       if (onClick) {
         onClick({} as React.MouseEvent);

web/ui/react-app/src/pages/graph/GraphControls.tsx

@@ -1,10 +1,10 @@
 import React, { Component } from 'react';
-import { Button, ButtonGroup, Form, InputGroup, InputGroupAddon, Input } from 'reactstrap';
+import { Button, ButtonGroup, Form, Input, InputGroup, InputGroupAddon } from 'reactstrap';
 
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
-import { faPlus, faMinus, faChartArea, faChartLine } from '@fortawesome/free-solid-svg-icons';
+import { faChartArea, faChartLine, faMinus, faPlus } from '@fortawesome/free-solid-svg-icons';
 import TimeInput from './TimeInput';
-import { parseDuration, formatDuration } from '../../utils';
+import { formatDuration, parseDuration } from '../../utils';
 
 interface GraphControlsProps {
   range: number;
@@ -46,7 +46,7 @@ class GraphControls extends Component<GraphControlsProps> {
     182 * 24 * 60 * 60,
     365 * 24 * 60 * 60,
     730 * 24 * 60 * 60,
-  ].map(s => s * 1000);
+  ].map((s) => s * 1000);
 
   onChangeRangeInput = (rangeText: string): void => {
     const range = parseDuration(rangeText);
@@ -58,7 +58,7 @@ class GraphControls extends Component<GraphControlsProps> {
   };
 
   changeRangeInput = (range: number): void => {
-    this.rangeRef.current!.value = formatDuration(range);
+    this.setCurrentRangeValue(formatDuration(range));
   };
 
   increaseRange = (): void => {
@@ -81,18 +81,24 @@ class GraphControls extends Component<GraphControlsProps> {
     }
   };
 
-  componentDidUpdate(prevProps: GraphControlsProps) {
+  componentDidUpdate(prevProps: GraphControlsProps): void {
     if (prevProps.range !== this.props.range) {
       this.changeRangeInput(this.props.range);
     }
     if (prevProps.resolution !== this.props.resolution) {
-      this.resolutionRef.current!.value = this.props.resolution !== null ? this.props.resolution.toString() : '';
+      this.setCurrentRangeValue(this.props.resolution !== null ? this.props.resolution.toString() : '');
     }
   }
 
-  render() {
+  setCurrentRangeValue(value: string): void {
+    if (this.rangeRef.current) {
+      this.rangeRef.current.value = value;
+    }
+  }
+
+  render(): JSX.Element {
     return (
-      <Form inline className="graph-controls" onSubmit={e => e.preventDefault()}>
+      <Form inline className="graph-controls" onSubmit={(e) => e.preventDefault()}>
         <InputGroup className="range-input" size="sm">
           <InputGroupAddon addonType="prepend">
             <Button title="Decrease range" onClick={this.decreaseRange}>
@@ -103,9 +109,13 @@ class GraphControls extends Component<GraphControlsProps> {
           <Input
             defaultValue={formatDuration(this.props.range)}
             innerRef={this.rangeRef}
-            onBlur={() => this.onChangeRangeInput(this.rangeRef.current!.value)}
+            onBlur={() => {
+              if (this.rangeRef.current) {
+                this.onChangeRangeInput(this.rangeRef.current.value);
+              }
+            }}
             onKeyDown={(e: React.KeyboardEvent<HTMLInputElement>) =>
-              e.key === 'Enter' && this.onChangeRangeInput(this.rangeRef.current!.value)
+              e.key === 'Enter' && this.rangeRef.current && this.onChangeRangeInput(this.rangeRef.current.value)
             }
           />
 
@@ -130,8 +140,10 @@ class GraphControls extends Component<GraphControlsProps> {
           defaultValue={this.props.resolution !== null ? this.props.resolution.toString() : ''}
           innerRef={this.resolutionRef}
           onBlur={() => {
-            const res = parseInt(this.resolutionRef.current!.value);
+            if (this.resolutionRef.current) {
+              const res = parseInt(this.resolutionRef.current.value);
               this.props.onChangeResolution(res ? res : null);
+            }
           }}
           bsSize="sm"
         />

web/ui/react-app/src/pages/graph/GraphHelpers.test.ts

@@ -60,7 +60,7 @@ describe('GraphHelpers', () => {
         { input: 2e-24, output: '2.00y' },
         { input: 2e-25, output: '0.20y' },
         { input: 2e-26, output: '0.02y' },
-      ].map(t => {
+      ].map((t) => {
         expect(formatValue(t.input)).toBe(t.output);
       });
     });
@@ -80,7 +80,7 @@ describe('GraphHelpers', () => {
       };
       expect(
         getColors(data)
-          .map(c => c.toString())
+          .map((c) => c.toString())
           .join(',')
       ).toEqual(
         'rgb(237,194,64),rgb(175,216,248),rgb(203,75,75),rgb(77,167,77),rgb(148,64,237),rgb(189,155,51),rgb(140,172,198)'

web/ui/react-app/src/pages/graph/GraphHelpers.ts

@@ -53,7 +53,7 @@ export const formatValue = (y: number | null): string => {
   throw Error("couldn't format a value, this is a bug");
 };
 
-export const getHoverColor = (color: string, opacity: number, stacked: boolean) => {
+export const getHoverColor = (color: string, opacity: number, stacked: boolean): string => {
   const { r, g, b } = $.color.parse(color);
   if (!stacked) {
     return `rgba(${r}, ${g}, ${b}, ${opacity})`;
@@ -67,10 +67,15 @@ export const getHoverColor = (color: string, opacity: number, stacked: boolean)
   return `rgb(${Math.round(base + opacity * r)},${Math.round(base + opacity * g)},${Math.round(base + opacity * b)})`;
 };
 
-export const toHoverColor = (index: number, stacked: boolean) => (series: GraphSeries, i: number) => ({
+export const toHoverColor =
+  (index: number, stacked: boolean) =>
+  (
+    series: GraphSeries,
+    i: number
+  ): { color: string; data: (number | null)[][]; index: number; labels: { [p: string]: string } } => ({
     ...series,
     color: getHoverColor(series.color, i !== index ? 0.3 : 1, stacked),
-});
+  });
 
 export const getOptions = (stacked: boolean, useLocalTime: boolean): jquery.flot.plotOptions => {
   return {
@@ -113,8 +118,8 @@ export const getOptions = (stacked: boolean, useLocalTime: boolean): jquery.flot
               ${Object.keys(labels).length === 0 ? '<div class="mb-1 font-italic">no labels</div>' : ''}
               ${labels['__name__'] ? `<div class="mb-1"><strong>${labels['__name__']}</strong></div>` : ''}
               ${Object.keys(labels)
-                .filter(k => k !== '__name__')
+                .filter((k) => k !== '__name__')
-                .map(k => `<div class="mb-1"><strong>${k}</strong>: ${escapeHTML(labels[k])}</div>`)
+                .map((k) => `<div class="mb-1"><strong>${k}</strong>: ${escapeHTML(labels[k])}</div>`)
                 .join('')}
             </div>`;
 
@@ -154,7 +159,10 @@ export const getOptions = (stacked: boolean, useLocalTime: boolean): jquery.flot
 };
 
 // This was adapted from Flot's color generation code.
-export const getColors = (data: { resultType: string; result: Array<{ metric: Metric; values: [number, string][] }> }) => {
+export const getColors = (data: {
+  resultType: string;
+  result: Array<{ metric: Metric; values: [number, string][] }>;
+}): Color[] => {
   const colorPool = ['#edc240', '#afd8f8', '#cb4b4b', '#4da74d', '#9440ed'];
   const colorPoolSize = colorPool.length;
   let variation = 0;
@@ -180,6 +188,7 @@ export const getColors = (data: { resultType: string; result: Array<{ metric: Me
 
 export const normalizeData = ({ queryParams, data, exemplars, stacked }: GraphProps): GraphData => {
   const colors = getColors(data);
+  // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
   const { startTime, endTime, resolution } = queryParams!;
 
   let sum = 0;
@@ -233,7 +242,7 @@ export const normalizeData = ({ queryParams, data, exemplars, stacked }: GraphPr
         index,
       };
     }),
-    exemplars: Object.values(buckets).flatMap(bucket => {
+    exemplars: Object.values(buckets).flatMap((bucket) => {
       if (bucket.length === 1) {
         return bucket[0];
       }
@@ -256,7 +265,7 @@ export const normalizeData = ({ queryParams, data, exemplars, stacked }: GraphPr
   };
 };
 
-export const parseValue = (value: string) => {
+export const parseValue = (value: string): null | number => {
   const val = parseFloat(value);
   // "+Inf", "-Inf", "+Inf" will be parsed into NaN by parseFloat(). They
   // can't be graphed, so show them as gaps (null).
@@ -290,7 +299,7 @@ const exemplarSymbol = (ctx: CanvasRenderingContext2D, x: number, y: number) =>
 const stdDeviation = (sum: number, values: number[]): number => {
   const avg = sum / values.length;
   let squaredAvg = 0;
-  values.map(value => (squaredAvg += (value - avg) ** 2));
+  values.map((value) => (squaredAvg += (value - avg) ** 2));
   squaredAvg = squaredAvg / values.length;
   return Math.sqrt(squaredAvg);
 };

web/ui/react-app/src/pages/graph/GraphTabContent.tsx

@@ -5,6 +5,7 @@ import { QueryParams, ExemplarData } from '../../types/types';
 import { isPresent } from '../../utils';
 
 interface GraphTabContentProps {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   data: any;
   exemplars: ExemplarData;
   stacked: boolean;

web/ui/react-app/src/pages/graph/Legend.tsx

@@ -18,12 +18,14 @@ export class Legend extends PureComponent<LegendProps, LegendState> {
   state = {
     selectedIndexes: [] as number[],
   };
-  componentDidUpdate(prevProps: LegendProps) {
+  componentDidUpdate(prevProps: LegendProps): void {
     if (this.props.shouldReset && prevProps.shouldReset !== this.props.shouldReset) {
       this.setState({ selectedIndexes: [] });
     }
   }
-  handleSeriesSelect = (index: number) => (ev: React.MouseEvent<HTMLDivElement, MouseEvent>) => {
+  handleSeriesSelect =
+    (index: number) =>
+    (ev: React.MouseEvent<HTMLDivElement, MouseEvent>): void => {
       // TODO: add proper event type
       const { selectedIndexes } = this.state;
 
@@ -31,7 +33,7 @@ export class Legend extends PureComponent<LegendProps, LegendState> {
       if (ev.ctrlKey || ev.metaKey) {
         const { chartData } = this.props;
         if (selectedIndexes.includes(index)) {
-        selected = selectedIndexes.filter(idx => idx !== index);
+          selected = selectedIndexes.filter((idx) => idx !== index);
         } else {
           selected =
             // Flip the logic - In case none is selected ctrl + click should deselect clicked series.
@@ -47,7 +49,7 @@ export class Legend extends PureComponent<LegendProps, LegendState> {
       this.props.onSeriesToggle(selected, index);
     };
 
-  render() {
+  render(): JSX.Element {
     const { chartData, onLegendMouseOut, onHover } = this.props;
     const { selectedIndexes } = this.state;
     const canUseHover = chartData.length > 1 && selectedIndexes.length === 0;

web/ui/react-app/src/pages/graph/MetricsExplorer.tsx

@@ -8,22 +8,22 @@ interface Props {
   insertAtCursor(value: string): void;
 }
 
-class MetricsExplorer extends Component<Props, {}> {
+class MetricsExplorer extends Component<Props> {
-  handleMetricClick = (query: string) => {
+  handleMetricClick = (query: string): void => {
     this.props.insertAtCursor(query);
     this.props.updateShow(false);
   };
 
-  toggle = () => {
+  toggle = (): void => {
     this.props.updateShow(!this.props.show);
   };
 
-  render() {
+  render(): JSX.Element {
     return (
       <Modal isOpen={this.props.show} toggle={this.toggle} className="metrics-explorer">
         <ModalHeader toggle={this.toggle}>Metrics Explorer</ModalHeader>
         <ModalBody>
-          {this.props.metrics.map(metric => (
+          {this.props.metrics.map((metric) => (
             <p key={metric} className="metric" onClick={this.handleMetricClick.bind(this, metric)}>
               {metric}
             </p>

web/ui/react-app/src/pages/graph/Panel.test.tsx

@@ -75,7 +75,7 @@ describe('Panel', () => {
   });
 
   it('renders a TabPane with a TimeInput and a DataTable when in table mode', () => {
-    const tab = panel.find(TabPane).filterWhere(tab => tab.prop('tabId') === 'table');
+    const tab = panel.find(TabPane).filterWhere((tab) => tab.prop('tabId') === 'table');
     const timeInput = tab.find(TimeInput);
     expect(timeInput.prop('time')).toEqual(defaultProps.options.endTime);
     expect(timeInput.prop('range')).toEqual(defaultProps.options.range);

web/ui/react-app/src/pages/graph/Panel.tsx

@@ -31,6 +31,7 @@ interface PanelProps {
 }
 
 interface PanelState {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   data: any; // TODO: Type data.
   exemplars: ExemplarData;
   lastQueryParams: QueryParams | null;
@@ -84,7 +85,7 @@ class Panel extends Component<PanelProps, PanelState> {
     };
   }
 
-  componentDidUpdate({ options: prevOpts }: PanelProps) {
+  componentDidUpdate({ options: prevOpts }: PanelProps): void {
     const { endTime, range, resolution, showExemplars, type } = this.props.options;
     if (
       prevOpts.endTime !== endTime ||
@@ -97,10 +98,11 @@ class Panel extends Component<PanelProps, PanelState> {
     }
   }
 
-  componentDidMount() {
+  componentDidMount(): void {
     this.executeQuery();
   }
 
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   executeQuery = async (): Promise<any> => {
     const { exprInputValue: expr } = this.state;
     const queryStart = Date.now();
@@ -151,7 +153,7 @@ class Panel extends Component<PanelProps, PanelState> {
         cache: 'no-store',
         credentials: 'same-origin',
         signal: abortController.signal,
-      }).then(resp => resp.json());
+      }).then((resp) => resp.json());
 
       if (query.status !== 'success') {
         throw new Error(query.error || 'invalid response JSON');
@@ -163,7 +165,7 @@ class Panel extends Component<PanelProps, PanelState> {
           cache: 'no-store',
           credentials: 'same-origin',
           signal: abortController.signal,
-        }).then(resp => resp.json());
+        }).then((resp) => resp.json());
 
         if (exemplars.status !== 'success') {
           throw new Error(exemplars.error || 'invalid response JSON');
@@ -210,7 +212,7 @@ class Panel extends Component<PanelProps, PanelState> {
     }
   };
 
-  setOptions(opts: object): void {
+  setOptions(opts: Record<string, unknown>): void {
     const newOpts = { ...this.props.options, ...opts };
     this.props.onOptionsChanged(newOpts);
   }
@@ -230,15 +232,15 @@ class Panel extends Component<PanelProps, PanelState> {
     return this.props.options.endTime;
   };
 
-  handleChangeEndTime = (endTime: number | null) => {
+  handleChangeEndTime = (endTime: number | null): void => {
     this.setOptions({ endTime: endTime });
   };
 
-  handleChangeResolution = (resolution: number | null) => {
+  handleChangeResolution = (resolution: number | null): void => {
     this.setOptions({ resolution: resolution });
   };
 
-  handleChangeType = (type: PanelType) => {
+  handleChangeType = (type: PanelType): void => {
     if (this.props.options.type === type) {
       return;
     }
@@ -247,19 +249,19 @@ class Panel extends Component<PanelProps, PanelState> {
     this.setOptions({ type: type });
   };
 
-  handleChangeStacking = (stacked: boolean) => {
+  handleChangeStacking = (stacked: boolean): void => {
     this.setOptions({ stacked: stacked });
   };
 
-  handleChangeShowExemplars = (show: boolean) => {
+  handleChangeShowExemplars = (show: boolean): void => {
     this.setOptions({ showExemplars: show });
   };
 
-  handleTimeRangeSelection = (startTime: number, endTime: number) => {
+  handleTimeRangeSelection = (startTime: number, endTime: number): void => {
     this.setOptions({ range: endTime - startTime, endTime: endTime });
   };
 
-  render() {
+  render(): JSX.Element {
     const { pastQueries, metricNames, options } = this.props;
     return (
       <div className="panel">

web/ui/react-app/src/pages/graph/PanelList.tsx

@@ -11,7 +11,7 @@ import { API_PATH } from '../../constants/constants';
 
 export type PanelMeta = { key: string; options: PanelOptions; id: string };
 
-export const updateURL = (nextPanels: PanelMeta[]) => {
+export const updateURL = (nextPanels: PanelMeta[]): void => {
   const query = encodePanelOptionsToQueryString(nextPanels);
   window.history.pushState({}, '', query);
 };
@@ -91,8 +91,8 @@ export const PanelListContent: FC<PanelListContentProps> = ({
           key={id}
           id={id}
           options={options}
-          onOptionsChanged={opts =>
+          onOptionsChanged={(opts) =>
-            callAll(setPanels, updateURL)(panels.map(p => (id === p.id ? { ...p, options: opts } : p)))
+            callAll(setPanels, updateURL)(panels.map((p) => (id === p.id ? { ...p, options: opts } : p)))
           }
           removePanel={() =>
             callAll(

web/ui/react-app/src/pages/graph/QueryStatsView.tsx

@@ -6,7 +6,7 @@ export interface QueryStats {
   resultSeries: number;
 }
 
-const QueryStatsView: FC<QueryStats> = props => {
+const QueryStatsView: FC<QueryStats> = (props) => {
   const { loadTime, resolution, resultSeries } = props;
 
   return (

web/ui/react-app/src/pages/graph/SeriesName.test.tsx

@@ -55,7 +55,7 @@ describe('SeriesName', () => {
         const child = seriesName.childAt(i);
         const text = child
           .children()
-          .map(ch => ch.text())
+          .map((ch) => ch.text())
           .join('');
         switch (child.children().length) {
           case 1:

web/ui/react-app/src/pages/graph/SeriesName.tsx

@@ -29,7 +29,7 @@ const SeriesName: FC<SeriesNameProps> = ({ labels, format }) => {
 
     return (
       <div>
-        <span className="legend-metric-name">{labels!.__name__ || ''}</span>
+        <span className="legend-metric-name">{labels ? labels.__name__ : ''}</span>
         <span className="legend-label-brace">{'{'}</span>
         {labelNodes}
         <span className="legend-label-brace">{'}'}</span>
@@ -46,7 +46,7 @@ const SeriesName: FC<SeriesNameProps> = ({ labels, format }) => {
   }
   // Return a simple text node. This is much faster to scroll through
   // for longer lists (hundreds of items).
-  return <>{metricToSeriesName(labels!)}</>;
+  return <>{metricToSeriesName(labels)}</>;
 };
 
 export default SeriesName;

web/ui/react-app/src/pages/graph/TimeInput.test.tsx

@@ -39,11 +39,11 @@ describe('TimeInput', () => {
         title: 'Increase time',
         icon: faChevronRight,
       },
-    ].forEach(button => {
+    ].forEach((button) => {
       const onChangeTime = sinon.spy();
       const timeInput = shallow(<TimeInput {...timeInputProps} onChangeTime={onChangeTime} />);
-      const addon = timeInput.find(InputGroupAddon).filterWhere(addon => addon.prop('addonType') === button.position);
+      const addon = timeInput.find(InputGroupAddon).filterWhere((addon) => addon.prop('addonType') === button.position);
-      const btn = addon.find(Button).filterWhere(btn => btn.prop('title') === button.title);
+      const btn = addon.find(Button).filterWhere((btn) => btn.prop('title') === button.title);
       const icon = btn.find(FontAwesomeIcon);
       expect(icon.prop('icon')).toEqual(button.icon);
       expect(icon.prop('fixedWidth')).toBe(true);

web/ui/react-app/src/pages/graph/TimeInput.tsx

@@ -1,6 +1,6 @@
 import $ from 'jquery';
 import React, { Component } from 'react';
-import { Button, InputGroup, InputGroupAddon, Input } from 'reactstrap';
+import { Button, Input, InputGroup, InputGroupAddon } from 'reactstrap';
 
 import moment from 'moment-timezone';
 
@@ -11,11 +11,11 @@ import '../../../node_modules/tempusdominus-bootstrap-4/build/css/tempusdominus-
 import { dom, library } from '@fortawesome/fontawesome-svg-core';
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
 import {
+  faArrowDown,
+  faArrowUp,
+  faCalendarCheck,
   faChevronLeft,
   faChevronRight,
-  faCalendarCheck,
-  faArrowUp,
-  faArrowDown,
   faTimes,
 } from '@fortawesome/free-solid-svg-icons';
 
@@ -33,13 +33,14 @@ interface TimeInputProps {
 
 class TimeInput extends Component<TimeInputProps> {
   private timeInputRef = React.createRef<HTMLInputElement>();
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   private $time: any = null;
 
   getBaseTime = (): number => {
     return this.props.time || moment().valueOf();
   };
 
-  calcShiftRange = () => this.props.range / 2;
+  calcShiftRange = (): number => this.props.range / 2;
 
   increaseTime = (): void => {
     const time = this.getBaseTime() + this.calcShiftRange();
@@ -59,8 +60,11 @@ class TimeInput extends Component<TimeInputProps> {
     return this.props.useLocalTime ? moment.tz.guess() : 'UTC';
   };
 
-  componentDidMount() {
+  componentDidMount(): void {
-    this.$time = $(this.timeInputRef.current!);
+    if (!this.timeInputRef.current) {
+      return;
+    }
+    this.$time = $(this.timeInputRef.current);
 
     this.$time.datetimepicker({
       icons: {
@@ -78,20 +82,21 @@ class TimeInput extends Component<TimeInputProps> {
       defaultDate: this.props.time,
     });
 
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
     this.$time.on('change.datetimepicker', (e: any) => {
       // The end time can also be set by dragging a section on the graph,
       // and that value will have decimal places.
-      if (e.date && e.date.valueOf() !== Math.trunc(this.props.time?.valueOf()!)) {
+      if (e.date && e.date.valueOf() !== Math.trunc(this.props.time?.valueOf() || NaN)) {
         this.props.onChangeTime(e.date.valueOf());
       }
     });
   }
 
-  componentWillUnmount() {
+  componentWillUnmount(): void {
     this.$time.datetimepicker('destroy');
   }
 
-  componentDidUpdate(prevProps: TimeInputProps) {
+  componentDidUpdate(prevProps: TimeInputProps): void {
     const { time, useLocalTime } = this.props;
     if (prevProps.time !== time) {
       this.$time.datetimepicker('date', time ? moment(time) : null);
@@ -101,7 +106,7 @@ class TimeInput extends Component<TimeInputProps> {
     }
   }
 
-  render() {
+  render(): JSX.Element {
     return (
       <InputGroup className="time-input" size="sm">
         <InputGroupAddon addonType="prepend">
@@ -115,7 +120,7 @@ class TimeInput extends Component<TimeInputProps> {
           innerRef={this.timeInputRef}
           onFocus={() => this.$time.datetimepicker('show')}
           onBlur={() => this.$time.datetimepicker('hide')}
-          onKeyDown={e => ['Escape', 'Enter'].includes(e.key) && this.$time.datetimepicker('hide')}
+          onKeyDown={(e) => ['Escape', 'Enter'].includes(e.key) && this.$time.datetimepicker('hide')}
         />
 
         {/* CAUTION: While the datetimepicker also has an option to show a 'clear' button,

web/ui/react-app/src/pages/rules/RulesContent.tsx

@@ -22,7 +22,7 @@ export interface RulesMap {
   groups: RuleGroup[];
 }
 
-const GraphExpressionLink: FC<{ expr: string; text: string; title: string }> = props => {
+const GraphExpressionLink: FC<{ expr: string; text: string; title: string }> = (props) => {
   return (
     <>
       <strong>{props.title}:</strong>

web/ui/react-app/src/pages/serviceDiscovery/Services.tsx

@@ -1,7 +1,7 @@
 import React, { FC } from 'react';
 import { useFetch } from '../../hooks/useFetch';
 import { LabelsTable } from './LabelsTable';
-import { Target, Labels, DroppedTarget } from '../targets/target';
+import { DroppedTarget, Labels, Target } from '../targets/target';
 
 import { withStatusIndicator } from '../../components/withStatusIndicator';
 import { mapObjEntries } from '../../utils';
@@ -19,7 +19,10 @@ export interface TargetLabels {
   isDropped: boolean;
 }
 
-export const processSummary = (activeTargets: Target[], droppedTargets: DroppedTarget[]) => {
+export const processSummary = (
+  activeTargets: Target[],
+  droppedTargets: DroppedTarget[]
+): Record<string, { active: number; total: number }> => {
   const targets: Record<string, { active: number; total: number }> = {};
 
   // Get targets of each type along with the total and active end points
@@ -48,7 +51,7 @@ export const processSummary = (activeTargets: Target[], droppedTargets: DroppedT
   return targets;
 };
 
-export const processTargets = (activeTargets: Target[], droppedTargets: DroppedTarget[]) => {
+export const processTargets = (activeTargets: Target[], droppedTargets: DroppedTarget[]): Record<string, TargetLabels[]> => {
   const labels: Record<string, TargetLabels[]> = {};
 
   for (const target of activeTargets) {

web/ui/react-app/src/pages/status/Status.tsx

@@ -12,6 +12,7 @@ interface StatusPageProps {
 
 export const statusConfig: Record<
   string,
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   { title?: string; customizeValue?: (v: any, key: string) => any; customRow?: boolean; skip?: boolean }
 > = {
   startTime: { title: 'Start time', customizeValue: (v: string) => new Date(v).toUTCString() },
@@ -57,7 +58,7 @@ export const StatusContent: FC<StatusPageProps> = ({ data, title }) => {
       <Table className="h-auto" size="sm" bordered striped>
         <tbody>
           {Object.entries(data).map(([k, v]) => {
-            const { title = k, customizeValue = (val: any) => val, customRow, skip } = statusConfig[k] || {};
+            const { title = k, customizeValue = (val: string) => val, customRow, skip } = statusConfig[k] || {};
             if (skip) {
               return null;
             }

web/ui/react-app/src/pages/targets/EndpointLink.test.tsx

@@ -24,16 +24,16 @@ describe('EndpointLink', () => {
     expect(anchor.children().text()).toEqual('http://100.99.128.71:9115/probe');
     expect(endpointLink.find('br')).toHaveLength(1);
     expect(badges).toHaveLength(2);
-    const moduleLabel = badges.filterWhere(badge => badge.children().text() === 'module="http_2xx"');
+    const moduleLabel = badges.filterWhere((badge) => badge.children().text() === 'module="http_2xx"');
     expect(moduleLabel.length).toEqual(1);
-    const targetLabel = badges.filterWhere(badge => badge.children().text() === 'target="http://some-service"');
+    const targetLabel = badges.filterWhere((badge) => badge.children().text() === 'target="http://some-service"');
     expect(targetLabel.length).toEqual(1);
   });
 
   it('renders an alert if url is invalid', () => {
     const endpointLink = shallow(<EndpointLink endpoint={'afdsacas'} globalUrl={'afdsacas'} />);
     const err = endpointLink.find(Alert);
-    expect(err.render().text()).toEqual('Error: Invalid URL');
+    expect(err.render().text()).toEqual('Error: Invalid URL: afdsacas');
   });
 
   it('handles params with multiple values correctly', () => {

web/ui/react-app/src/pages/targets/Filter.test.tsx

@@ -15,7 +15,7 @@ describe('Filter', () => {
     showUnhealthy: true,
   };
   let setFilter: SinonSpy;
-  let filterWrapper: ShallowWrapper<FilterProps, Readonly<{}>, Component<{}, {}, Component>>;
+  let filterWrapper: ShallowWrapper<FilterProps, Readonly<unknown>, Component<unknown, unknown, Component>>;
   beforeEach(() => {
     setFilter = sinon.spy();
     setExpaned = sinon.spy();

web/ui/react-app/src/pages/targets/ScrapePoolList.test.tsx

@@ -50,7 +50,7 @@ describe('ScrapePoolList', () => {
       expect(panels).toHaveLength(3);
       const activeTargets: Target[] = sampleApiResponse.data.activeTargets as Target[];
       activeTargets.forEach(({ scrapePool }: Target) => {
-        const panel = scrapePoolList.find(ScrapePoolPanel).filterWhere(panel => panel.prop('scrapePool') === scrapePool);
+        const panel = scrapePoolList.find(ScrapePoolPanel).filterWhere((panel) => panel.prop('scrapePool') === scrapePool);
         expect(panel).toHaveLength(1);
       });
     });

web/ui/react-app/src/pages/targets/ScrapePoolList.tsx

@@ -34,12 +34,12 @@ export const ScrapePoolContent: FC<ScrapePoolListProps> = ({ activeTargets }) =>
     <>
       <Filter filter={filter} setFilter={setFilter} expanded={expanded} setExpanded={setExpanded} />
       {Object.keys(targetGroups)
-        .filter(scrapePool => {
+        .filter((scrapePool) => {
           const targetGroup = targetGroups[scrapePool];
           const isHealthy = targetGroup.upCount === targetGroup.targets.length;
           return (isHealthy && showHealthy) || (!isHealthy && showUnhealthy);
         })
-        .map<JSX.Element>(scrapePool => (
+        .map<JSX.Element>((scrapePool) => (
           <ScrapePoolPanel
             key={scrapePool}
             scrapePool={scrapePool}

web/ui/react-app/src/pages/targets/ScrapePoolPanel.test.tsx

@@ -18,7 +18,7 @@ describe('ScrapePoolPanel', () => {
   const scrapePoolPanel = shallow(<ScrapePoolPanel {...defaultProps} />);
 
   it('renders a container', () => {
-    const div = scrapePoolPanel.find('div').filterWhere(elem => elem.hasClass('container'));
+    const div = scrapePoolPanel.find('div').filterWhere((elem) => elem.hasClass('container'));
     expect(div).toHaveLength(1);
   });
 
@@ -79,7 +79,7 @@ describe('ScrapePoolPanel', () => {
       const headers = table.find('th');
       expect(table).toHaveLength(1);
       expect(headers).toHaveLength(6);
-      columns.forEach(col => {
+      columns.forEach((col) => {
         expect(headers.contains(col));
       });
     });
@@ -97,7 +97,7 @@ describe('ScrapePoolPanel', () => {
           });
 
           it('renders a badge for health', () => {
-            const td = row.find('td').filterWhere(elem => Boolean(elem.hasClass('state')));
+            const td = row.find('td').filterWhere((elem) => Boolean(elem.hasClass('state')));
             const badge = td.find(Badge);
             expect(badge).toHaveLength(1);
             expect(badge.prop('color')).toEqual(getColor(health));
@@ -112,17 +112,17 @@ describe('ScrapePoolPanel', () => {
           });
 
           it('renders last scrape time', () => {
-            const lastScrapeCell = row.find('td').filterWhere(elem => Boolean(elem.hasClass('last-scrape')));
+            const lastScrapeCell = row.find('td').filterWhere((elem) => Boolean(elem.hasClass('last-scrape')));
             expect(lastScrapeCell).toHaveLength(1);
           });
 
           it('renders last scrape duration', () => {
-            const lastScrapeCell = row.find('td').filterWhere(elem => Boolean(elem.hasClass('scrape-duration')));
+            const lastScrapeCell = row.find('td').filterWhere((elem) => Boolean(elem.hasClass('scrape-duration')));
             expect(lastScrapeCell).toHaveLength(1);
           });
 
           it('renders a badge for Errors', () => {
-            const td = row.find('td').filterWhere(elem => Boolean(elem.hasClass('errors')));
+            const td = row.find('td').filterWhere((elem) => Boolean(elem.hasClass('errors')));
             const badge = td.find(Badge);
             expect(badge).toHaveLength(lastError ? 1 : 0);
             if (lastError) {

web/ui/react-app/src/pages/targets/ScrapePoolPanel.tsx

@@ -38,7 +38,7 @@ const ScrapePoolPanel: FC<PanelProps> = ({ scrapePool, targetGroup, expanded, to
         <Table className={styles.table} size="sm" bordered hover striped>
           <thead>
             <tr key="header">
-              {columns.map(column => (
+              {columns.map((column) => (
                 <th key={column}>{column}</th>
               ))}
             </tr>

web/ui/react-app/src/pages/targets/TargetLabels.test.tsx

@@ -23,7 +23,7 @@ describe('targetLabels', () => {
   const targetLabels = shallow(<TargetLabels {...defaultProps} />);
 
   it('renders a div of series labels', () => {
-    const div = targetLabels.find('div').filterWhere(elem => elem.hasClass('series-labels-container'));
+    const div = targetLabels.find('div').filterWhere((elem) => elem.hasClass('series-labels-container'));
     expect(div).toHaveLength(1);
     expect(div.prop('id')).toEqual('series-labels-cortex/node-exporter_group/0-1');
   });
@@ -33,7 +33,7 @@ describe('targetLabels', () => {
     Object.keys(l).forEach((labelName: string): void => {
       const badge = targetLabels
         .find(Badge)
-        .filterWhere(badge => badge.children().text() === `${labelName}="${l[labelName]}"`);
+        .filterWhere((badge) => badge.children().text() === `${labelName}="${l[labelName]}"`);
       expect(badge).toHaveLength(1);
     });
     expect(targetLabels.find(Badge)).toHaveLength(3);

web/ui/react-app/src/pages/targets/TargetLabels.tsx

@@ -14,7 +14,7 @@ export interface TargetLabelsProps {
   scrapePool: string;
 }
 
-const formatLabels = (labels: Labels): string[] => Object.keys(labels).map(key => `${key}="${labels[key]}"`);
+const formatLabels = (labels: Labels): string[] => Object.keys(labels).map((key) => `${key}="${labels[key]}"`);
 
 const TargetLabels: FC<TargetLabelsProps> = ({ discoveredLabels, labels, idx, scrapePool }) => {
   const [tooltipOpen, setTooltipOpen] = useState(false);
@@ -25,7 +25,7 @@ const TargetLabels: FC<TargetLabelsProps> = ({ discoveredLabels, labels, idx, sc
   return (
     <>
       <div id={id} className="series-labels-container">
-        {Object.keys(labels).map(labelName => {
+        {Object.keys(labels).map((labelName) => {
           return (
             <Badge color="primary" className="mr-1" key={labelName}>
               {`${labelName}="${labels[labelName]}"`}

web/ui/react-app/src/pages/targets/__testdata__/testdata.ts

@@ -1,5 +1,3 @@
-/* eslint @typescript-eslint/camelcase: 0 */
-
 import { ScrapePools } from '../target';
 
 export const targetGroups: ScrapePools = Object.freeze({

web/ui/react-app/src/pages/targets/target.test.ts

@@ -1,5 +1,3 @@
-/* eslint @typescript-eslint/camelcase: 0 */
-
 import { sampleApiResponse } from './__testdata__/testdata';
 import { groupTargets, Target, ScrapePools, getColor } from './target';
 
@@ -8,7 +6,7 @@ describe('groupTargets', () => {
   const targetGroups: ScrapePools = groupTargets(targets);
 
   it('groups a list of targets by scrape job', () => {
-    ['blackbox', 'prometheus/test', 'node_exporter'].forEach(scrapePool => {
+    ['blackbox', 'prometheus/test', 'node_exporter'].forEach((scrapePool) => {
       expect(Object.keys(targetGroups)).toContain(scrapePool);
     });
     Object.keys(targetGroups).forEach((scrapePool: string): void => {

web/ui/react-app/src/pages/tsdbStatus/TSDBStatus.test.tsx

@@ -121,11 +121,7 @@ describe('TSDB Stats', () => {
         credentials: 'same-origin',
       });
 
-      const headStats = page
+      const headStats = page.find(Table).at(0).find('tbody').find('td');
-        .find(Table)
-        .at(0)
-        .find('tbody')
-        .find('td');
       ['508', '937', '1234', '2020-06-07T08:00:00.000Z (1591516800000)', '2020-08-31T18:00:00.143Z (1598896800143)'].forEach(
         (value, i) => {
           expect(headStats.at(i).text()).toEqual(value);
@@ -170,11 +166,7 @@ describe('TSDB Stats', () => {
 
       expect(page.find('h2').text()).toEqual('TSDB Status');
 
-      const headStats = page
+      const headStats = page.find(Table).at(0).find('tbody').find('td');
-        .find(Table)
-        .at(0)
-        .find('tbody')
-        .find('td');
       ['0', '0', '0', 'No datapoints yet', 'No datapoints yet'].forEach((value, i) => {
         expect(headStats.at(i).text()).toEqual(value);
       });
@@ -199,11 +191,7 @@ describe('TSDB Stats', () => {
 
       expect(page.find('h2').text()).toEqual('TSDB Status');
 
-      const headStats = page
+      const headStats = page.find(Table).at(0).find('tbody').find('td');
-        .find(Table)
-        .at(0)
-        .find('tbody')
-        .find('td');
       ['1', '0', '0', 'Error parsing time (9223372036854776000)', 'Error parsing time (-9223372036854776000)'].forEach(
         (value, i) => {
           expect(headStats.at(i).text()).toEqual(value);

web/ui/react-app/src/setupTests.ts

@@ -11,12 +11,12 @@ customGlobal.fetchMock = customGlobal.fetch;
 
 // CodeMirror in the expression input requires this DOM API. When we upgrade react-scripts
 // and the associated Jest deps, hopefully this won't be needed anymore.
-document.getSelection = function() {
+document.getSelection = function () {
   return {
-    addRange: function() {
+    addRange: function () {
       return;
     },
-    removeAllRanges: function() {
+    removeAllRanges: function () {
       return;
     },
   };

web/ui/react-app/src/types/index.d.ts

@@ -1,9 +1,7 @@
 declare namespace jquery.flot {
-  // eslint-disable-next-line @typescript-eslint/class-name-casing
   interface plot extends jquery.flot.plot {
     destroy: () => void;
   }
-  // eslint-disable-next-line @typescript-eslint/class-name-casing
   interface plotOptions extends jquery.flot.plotOptions {
     tooltip: {
       show?: boolean;

web/ui/react-app/src/utils/index.ts

@@ -3,13 +3,11 @@ import moment from 'moment-timezone';
 import { PanelOptions, PanelType, PanelDefaultOptions } from '../pages/graph/Panel';
 import { PanelMeta } from '../pages/graph/PanelList';
 
-export const generateID = () => {
+export const generateID = (): string => {
-  return `_${Math.random()
+  return `_${Math.random().toString(36).substr(2, 9)}`;
-    .toString(36)
-    .substr(2, 9)}`;
 };
 
-export const byEmptyString = (p: string) => p.length > 0;
+export const byEmptyString = (p: string): boolean => p.length > 0;
 
 export const isPresent = <T>(obj: T): obj is NonNullable<T> => obj !== null && obj !== undefined;
 
@@ -23,12 +21,12 @@ export const escapeHTML = (str: string): string => {
     '/': '&#x2F;',
   };
 
-  return String(str).replace(/[&<>"'/]/g, function(s) {
+  return String(str).replace(/[&<>"'/]/g, function (s) {
     return entityMap[s];
   });
 };
 
-export const metricToSeriesName = (labels: { [key: string]: string }) => {
+export const metricToSeriesName = (labels: { [key: string]: string }): string => {
   if (labels === null) {
     return 'scalar';
   }
@@ -219,11 +217,13 @@ export const parseOption = (param: string): Partial<PanelOptions> => {
   return {};
 };
 
-export const formatParam = (key: string) => (paramName: string, value: number | string | boolean) => {
+export const formatParam =
+  (key: string) =>
+  (paramName: string, value: number | string | boolean): string => {
     return `g${key}.${paramName}=${encodeURIComponent(value)}`;
-};
+  };
 
-export const toQueryString = ({ key, options }: PanelMeta) => {
+export const toQueryString = ({ key, options }: PanelMeta): string => {
   const formatWithKey = formatParam(key);
   const { expr, type, stacked, range, endTime, resolution, showExemplars } = options;
   const time = isPresent(endTime) ? formatTime(endTime) : false;
@@ -239,24 +239,30 @@ export const toQueryString = ({ key, options }: PanelMeta) => {
   return urlParams.filter(byEmptyString).join('&');
 };
 
-export const encodePanelOptionsToQueryString = (panels: PanelMeta[]) => {
+export const encodePanelOptionsToQueryString = (panels: PanelMeta[]): string => {
   return `?${panels.map(toQueryString).join('&')}`;
 };
 
-export const createExpressionLink = (expr: string) => {
+export const createExpressionLink = (expr: string): string => {
   return `../graph?g0.expr=${encodeURIComponent(expr)}&g0.tab=1&g0.stacked=0&g0.show_exemplars=0.g0.range_input=1h.`;
 };
 export const mapObjEntries = <T, key extends keyof T, Z>(
   o: T,
   cb: ([k, v]: [string, T[key]], i: number, arr: [string, T[key]][]) => Z
-) => Object.entries(o).map(cb);
+): Z[] => Object.entries(o).map(cb);
 
-export const callAll = (...fns: Array<(...args: any) => void>) => (...args: any) => {
+export const callAll =
+  (
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    ...fns: Array<(...args: any) => void>
+  ) =>
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any, @typescript-eslint/explicit-module-boundary-types
+  (...args: any): void => {
     // eslint-disable-next-line prefer-spread
-  fns.filter(Boolean).forEach(fn => fn.apply(null, args));
+    fns.filter(Boolean).forEach((fn) => fn.apply(null, args));
-};
+  };
 
-export const parsePrometheusFloat = (value: string) => {
+export const parsePrometheusFloat = (value: string): string | number => {
   if (isNaN(Number(value))) {
     return value;
   } else {

web/ui/react-app/src/utils/utils.test.ts

@@ -136,7 +136,7 @@ describe('Utils', () => {
           },
         ];
 
-        tests.forEach(t => {
+        tests.forEach((t) => {
           it(t.input, () => {
             const d = parseDuration(t.input);
             expect(d).toEqual(t.output);
@@ -148,7 +148,7 @@ describe('Utils', () => {
       describe('should fail to parse invalid durations', () => {
         const tests = ['1', '1y1m1d', '-1w', '1.5d', 'd', ''];
 
-        tests.forEach(t => {
+        tests.forEach((t) => {
           it(t, () => {
             expect(parseDuration(t)).toBe(null);
           });

web/ui/react-app/tsconfig.json

@@ -17,9 +17,12 @@
     "resolveJsonModule": true,
     "isolatedModules": true,
     "noEmit": true,
-    "jsx": "preserve"
+    "jsx": "react",
+    "noFallthroughCasesInSwitch": true
   },
   "include": [
-    "src", "test", "react-app-env.d.ts"
+    "src",
+    "test",
+    "react-app-env.d.ts"
   ]
 }