refactor: remove sub-eslintrc, fix more lint errors (#7530)

.eslintrc.js

@@ -19,7 +19,8 @@ module.exports = {
   },
   parser: '@typescript-eslint/parser',
   parserOptions: {
-    allowImportExportEverywhere: true,
+    // tsconfigRootDir: __dirname,
+    // project: ['./tsconfig.json', './website/tsconfig.json'],
   },
   globals: {
     JSX: true,
@@ -30,6 +31,8 @@ module.exports = {
     'plugin:jest/recommended',
     'airbnb',
     'plugin:@typescript-eslint/recommended',
+    // 'plugin:@typescript-eslint/recommended-requiring-type-checking',
+    // 'plugin:@typescript-eslint/strict',
     'plugin:regexp/recommended',
     'prettier',
     'plugin:@docusaurus/all',
@@ -302,6 +305,9 @@ module.exports = {
     'react/prop-types': OFF,
     'react/require-default-props': [ERROR, {ignoreFunctionalComponents: true}],
 
+    '@typescript-eslint/consistent-type-definitions': OFF,
+    '@typescript-eslint/require-await': OFF,
+
     '@typescript-eslint/ban-ts-comment': [
       ERROR,
       {'ts-expect-error': 'allow-with-description'},
@@ -363,20 +369,39 @@ module.exports = {
   overrides: [
     {
       files: [
-        'packages/docusaurus-*/src/theme/**/*.js',
-        'packages/docusaurus-*/src/theme/**/*.ts',
-        'packages/docusaurus-*/src/theme/**/*.tsx',
+        'packages/docusaurus-*/src/theme/**/*.{js,ts,tsx}',
+        'packages/docusaurus/src/client/**/*.{js,ts,tsx}',
+      ],
+      rules: {
+        'no-restricted-imports': [
+          'error',
+          {
+            patterns: [
+              // Prevent importing lodash in client bundle for bundle size
+              'lodash',
+              'lodash.**',
+              'lodash/**',
+              // Prevent importing server code in client bundle
+              '**/../babel/**',
+              '**/../server/**',
+              '**/../commands/**',
+              '**/../webpack/**',
+            ],
+          },
+        ],
+      },
+    },
+    {
+      files: [
+        'packages/docusaurus-*/src/theme/**/*.{js,ts,tsx}',
+        'packages/docusaurus/src/client/theme-fallback/**/*.{js,ts,tsx}',
       ],
       rules: {
         'import/no-named-export': ERROR,
       },
     },
     {
-      files: [
-        'packages/create-docusaurus/templates/**/*.js',
-        'packages/create-docusaurus/templates/**/*.ts',
-        'packages/create-docusaurus/templates/**/*.tsx',
-      ],
+      files: ['packages/create-docusaurus/templates/**/*.{js,ts,tsx}'],
       rules: {
         'header/header': OFF,
         'global-require': OFF,
@@ -391,14 +416,14 @@ module.exports = {
       },
     },
     {
-      files: ['*.ts', '*.tsx'],
+      files: ['*.{ts,tsx}'],
       rules: {
         'no-undef': OFF,
         'import/no-import-module-exports': OFF,
       },
     },
     {
-      files: ['*.js', '*.mjs', '.cjs'],
+      files: ['*.{js,mjs,cjs}'],
       rules: {
         // Make JS code directly runnable in Node.
         '@typescript-eslint/no-var-requires': OFF,
@@ -419,8 +444,7 @@ module.exports = {
       // Internal files where extraneous deps don't matter much at long as
       // they run
       files: [
-        '*.test.ts',
-        '*.test.tsx',
+        '*.test.{js,ts,tsx}',
         'admin/**',
         'jest/**',
         'website/**',
@@ -431,5 +455,9 @@ module.exports = {
         'import/no-extraneous-dependencies': OFF,
       },
     },
+    {
+      files: ['packages/eslint-plugin/**/*.{js,ts}'],
+      extends: ['plugin:eslint-plugin/recommended'],
+    },
   ],
 };

packages/create-docusaurus/bin/index.js

@@ -47,12 +47,12 @@ program
 \`custom\`: enter your custom git clone command. We will prompt you for it.`,
   )
   .description('Initialize website.')
-  .action((siteName, template, rootDir, options) => {
+  .action((siteName, template, rootDir, options) =>
     // See https://github.com/facebook/docusaurus/pull/6860
-    import('../lib/index.js').then(({default: init}) => {
-      init(path.resolve(rootDir ?? '.'), siteName, template, options);
-    });
-  });
+    import('../lib/index.js').then(({default: init}) =>
+      init(path.resolve(rootDir ?? '.'), siteName, template, options),
+    ),
+  );
 
 program.parse(process.argv);
 

packages/docusaurus-logger/src/index.ts

@@ -128,11 +128,11 @@ function newLine(): void {
 }
 
 const logger = {
-  red: chalk.red,
-  yellow: chalk.yellow,
-  green: chalk.green,
-  bold: chalk.bold,
-  dim: chalk.dim,
+  red: (msg: string | number): string => chalk.red(msg),
+  yellow: (msg: string | number): string => chalk.yellow(msg),
+  green: (msg: string | number): string => chalk.green(msg),
+  bold: (msg: string | number): string => chalk.bold(msg),
+  dim: (msg: string | number): string => chalk.dim(msg),
   path,
   url,
   name,

packages/docusaurus-mdx-loader/src/remark/toc/__tests__/__fixtures__/no-heading-with-toc-export.md

@@ -0,0 +1,9 @@
+foo
+
+`bar`
+
+```js
+baz
+```
+
+export const toc = 1;

packages/docusaurus-mdx-loader/src/remark/toc/__tests__/__snapshots__/index.test.ts.snap

@@ -1,5 +1,18 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`toc remark plugin does not overwrite TOC var if no TOC 1`] = `
+"foo
+
+\`bar\`
+
+\`\`\`js
+baz
+\`\`\`
+
+export const toc = 1;
+"
+`;
+
 exports[`toc remark plugin escapes inline code 1`] = `
 "export const toc = [
 	{

packages/docusaurus-mdx-loader/src/remark/toc/__tests__/index.test.ts

@@ -30,6 +30,14 @@ describe('toc remark plugin', () => {
     expect(result).toMatchSnapshot();
   });
 
+  // A very implicit API: we allow users to hand-write the toc variable. It will
+  // get overwritten in most cases, but until we find a better way, better keep
+  // supporting this
+  it('does not overwrite TOC var if no TOC', async () => {
+    const result = await processFixture('no-heading-with-toc-export');
+    expect(result).toMatchSnapshot();
+  });
+
   it('works on non text phrasing content', async () => {
     const result = await processFixture('non-text-content');
     expect(result).toMatchSnapshot();

packages/docusaurus-mdx-loader/src/remark/toc/index.ts

@@ -89,8 +89,10 @@ export default function plugin(): Transformer {
     const {children} = root as Parent<Literal>;
     const targetIndex = getOrCreateExistingTargetIndex(children);
 
-    children[targetIndex]!.value = `export const ${name} = ${stringifyObject(
-      headings,
-    )};`;
+    if (headings.length) {
+      children[targetIndex]!.value = `export const ${name} = ${stringifyObject(
+        headings,
+      )};`;
+    }
   };
 }

packages/docusaurus-migrate/src/index.ts

@@ -8,7 +8,7 @@
 import path from 'path';
 import fs from 'fs-extra';
 import logger from '@docusaurus/logger';
-import {Globby} from '@docusaurus/utils';
+import {Globby, DOCUSAURUS_VERSION} from '@docusaurus/utils';
 import importFresh from 'import-fresh';
 import Color from 'color';
 
@@ -23,9 +23,6 @@ import type {
   VersionTwoConfig,
 } from './types';
 
-const DOCUSAURUS_VERSION = (importFresh('../package.json') as {version: string})
-  .version;
-
 async function walk(dir: string): Promise<string[]> {
   const results: string[] = [];
   const list = await fs.readdir(dir);
@@ -82,7 +79,8 @@ export async function migrateDocusaurusProject(
   shouldMigratePages: boolean = false,
 ): Promise<void> {
   async function createMigrationContext(): Promise<MigrationContext> {
-    const v1Config = importFresh(`${siteDir}/siteConfig`) as VersionOneConfig;
+    const v1Config = (await import(`${siteDir}/siteConfig`))
+      .default as VersionOneConfig;
     logger.info('Starting migration from v1 to v2...');
     const deps = {
       '@docusaurus/core': DOCUSAURUS_VERSION,
@@ -444,9 +442,9 @@ async function migrateBlogFiles(context: MigrationContext) {
 async function handleVersioning(context: MigrationContext) {
   const {siteDir, newDir} = context;
   if (await fs.pathExists(path.join(siteDir, 'versions.json'))) {
-    const loadedVersions: string[] = await fs.readJSON(
+    const loadedVersions = (await fs.readJSON(
       path.join(siteDir, 'versions.json'),
-    );
+    )) as string[];
     await fs.copyFile(
       path.join(siteDir, 'versions.json'),
       path.join(newDir, 'versions.json'),
@@ -488,7 +486,11 @@ async function migrateVersionedDocs(
           path.join(newDir, 'versioned_docs', `version-${version}`),
         );
         await fs.copy(
-          path.join(newDir, 'versioned_docs', `version-${versions[index - 1]}`),
+          path.join(
+            newDir,
+            'versioned_docs',
+            `version-${versions[index - 1]!}`,
+          ),
           path.join(newDir, 'versioned_docs', `version-${version}`),
         );
         await fs.copy(
@@ -497,7 +499,11 @@ async function migrateVersionedDocs(
         );
       } catch {
         await fs.copy(
-          path.join(newDir, 'versioned_docs', `version-${versions[index - 1]}`),
+          path.join(
+            newDir,
+            'versioned_docs',
+            `version-${versions[index - 1]!}`,
+          ),
           path.join(newDir, 'versioned_docs', `version-${version}`),
         );
       }
@@ -543,7 +549,7 @@ async function migrateVersionedSidebar(
         `version-${version}-sidebars.json`,
       );
       try {
-        sidebarEntries = await fs.readJSON(sidebarPath);
+        sidebarEntries = (await fs.readJSON(sidebarPath)) as SidebarEntries;
       } catch {
         sidebars.push({version, entries: sidebars[i - 1]!.entries});
         return;

packages/docusaurus-plugin-content-docs/src/index.ts

@@ -100,9 +100,9 @@ export default async function pluginContentDocs(
         .command(command)
         .arguments('<version>')
         .description(commandDescription)
-        .action((version: unknown) => {
-          cliDocsVersionCommand(version, options, context);
-        });
+        .action((version: unknown) =>
+          cliDocsVersionCommand(version, options, context),
+        );
     },
 
     getTranslationFiles({content}) {

packages/docusaurus-plugin-pwa/src/renderReloadPopup.tsx

@@ -21,7 +21,7 @@ const createContainer = () => {
 };
 
 export default async function renderReloadPopup(props: Props): Promise<void> {
-  const container = getContainer() || createContainer();
+  const container = getContainer() ?? createContainer();
   const ReloadPopup = (await import('@theme/PwaReloadPopup')).default;
   ReactDOM.render(<ReloadPopup {...props} />, container);
 }

packages/docusaurus-plugin-sitemap/src/__tests__/createSitemap.test.ts

@@ -23,6 +23,7 @@ describe('createSitemap', () => {
         changefreq: EnumChangefreq.DAILY,
         priority: 0.7,
         ignorePatterns: [],
+        filename: 'sitemap.xml',
       },
     );
     expect(sitemap).toContain(
@@ -49,6 +50,7 @@ describe('createSitemap', () => {
         changefreq: EnumChangefreq.DAILY,
         priority: 0.7,
         ignorePatterns: [],
+        filename: 'sitemap.xml',
       },
     );
     expect(sitemap).not.toContain('404');
@@ -70,6 +72,7 @@ describe('createSitemap', () => {
           // Deep ignore
           '/tags/**',
         ],
+        filename: 'sitemap.xml',
       },
     );
     expect(sitemap).not.toContain('/search/</loc>');
@@ -89,6 +92,7 @@ describe('createSitemap', () => {
         changefreq: EnumChangefreq.DAILY,
         priority: 0.7,
         ignorePatterns: [],
+        filename: 'sitemap.xml',
       },
     );
 
@@ -110,6 +114,7 @@ describe('createSitemap', () => {
         changefreq: EnumChangefreq.DAILY,
         priority: 0.7,
         ignorePatterns: [],
+        filename: 'sitemap.xml',
       },
     );
 
@@ -131,6 +136,7 @@ describe('createSitemap', () => {
         changefreq: EnumChangefreq.DAILY,
         priority: 0.7,
         ignorePatterns: [],
+        filename: 'sitemap.xml',
       },
     );
 

packages/docusaurus-theme-classic/src/theme/MDXComponents/Code.tsx

@@ -11,7 +11,7 @@ import CodeBlock from '@theme/CodeBlock';
 import type {Props} from '@theme/MDXComponents/Code';
 
 export default function MDXCode(props: Props): JSX.Element {
-  const inlineElements = [
+  const inlineElements: (string | undefined)[] = [
     'a',
     'b',
     'big',
@@ -26,7 +26,10 @@ export default function MDXCode(props: Props): JSX.Element {
   const shouldBeInline = React.Children.toArray(props.children).every(
     (el) =>
       (typeof el === 'string' && !el.includes('\n')) ||
-      (isValidElement(el) && inlineElements.includes(el.props.mdxType)),
+      (isValidElement(el) &&
+        inlineElements.includes(
+          (el.props as {mdxType: string} | null)?.mdxType,
+        )),
   );
 
   return shouldBeInline ? (

packages/docusaurus-theme-classic/src/theme/MDXComponents/Details.tsx

@@ -15,7 +15,8 @@ export default function MDXDetails(props: Props): JSX.Element {
   // Details theme component
   const summary = items.find(
     (item): item is ReactElement<ComponentProps<'summary'>> =>
-      React.isValidElement(item) && item.props?.mdxType === 'summary',
+      React.isValidElement(item) &&
+      (item.props as {mdxType: string} | null)?.mdxType === 'summary',
   );
   const children = <>{items.filter((item) => item !== summary)}</>;
 

packages/docusaurus-theme-classic/src/theme/MDXComponents/Head.tsx

@@ -5,8 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-import React, {type ReactElement, type ComponentProps} from 'react';
-import Head from '@docusaurus/Head';
+import React, {type ReactElement} from 'react';
+import Head, {type Props as HeadProps} from '@docusaurus/Head';
 import type {Props} from '@theme/MDXComponents/Head';
 
 // MDX elements are wrapped through the MDX pragma. In some cases (notably usage
@@ -25,7 +25,5 @@ export default function MDXHead(props: Props): JSX.Element {
   const unwrappedChildren = React.Children.map(props.children, (child) =>
     React.isValidElement(child) ? unwrapMDXElement(child) : child,
   );
-  return (
-    <Head {...(props as ComponentProps<typeof Head>)}>{unwrappedChildren}</Head>
-  );
+  return <Head {...(props as HeadProps)}>{unwrappedChildren}</Head>;
 }

packages/docusaurus-theme-classic/src/theme/MDXComponents/Pre.tsx

@@ -14,7 +14,8 @@ export default function MDXPre(props: Props): JSX.Element {
     <CodeBlock
       // If this pre is created by a ``` fenced codeblock, unwrap the children
       {...(isValidElement(props.children) &&
-      props.children.props?.originalType === 'code'
+      (props.children.props as {originalType: string} | null)?.originalType ===
+        'code'
         ? props.children.props
         : {...props})}
     />

packages/docusaurus-theme-common/src/utils/historyUtils.ts

@@ -18,12 +18,12 @@ type HistoryBlockHandler = (location: Location, action: Action) => void | false;
  * will be blocked/cancelled.
  */
 function useHistoryActionHandler(handler: HistoryBlockHandler): void {
-  const {block} = useHistory();
+  const history = useHistory();
   const stableHandler = useDynamicCallback(handler);
   useEffect(
     // See https://github.com/remix-run/history/blob/main/docs/blocking-transitions.md
-    () => block((location, action) => stableHandler(location, action)),
-    [block, stableHandler],
+    () => history.block((location, action) => stableHandler(location, action)),
+    [history, stableHandler],
   );
 }
 

packages/docusaurus/src/client/.eslintrc.js

@@ -1,27 +0,0 @@
-/**
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-module.exports = {
-  rules: {
-    'no-restricted-imports': [
-      'error',
-      {
-        patterns: [
-          // Prevent importing lodash in client bundle for bundle size
-          'lodash',
-          'lodash.**',
-          'lodash/**',
-          // Prevent importing server code in client bundle
-          '**/../babel/**',
-          '**/../server/**',
-          '**/../commands/**',
-          '**/../webpack/**',
-        ],
-      },
-    ],
-  },
-};

packages/docusaurus/src/client/exports/ErrorBoundary.tsx

@@ -18,6 +18,7 @@ type State = {
   error: Error | null;
 };
 
+// eslint-disable-next-line react/function-component-definition
 const DefaultFallback: FallbackFunction = (params) => (
   <ThemeError {...params} />
 );

packages/docusaurus/src/server/translations/__tests__/translations.test.ts

@@ -45,9 +45,7 @@ async function createTmpTranslationFile(
 
   return {
     siteDir,
-    readFile() {
-      return fs.readJSON(filePath);
-    },
+    readFile: () => fs.readJSON(filePath),
   };
 }
 

packages/eslint-plugin/.eslintrc.js

@@ -1,10 +0,0 @@
-/**
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-module.exports = {
-  extends: ['../../.eslintrc.js', 'plugin:eslint-plugin/recommended'],
-};