diff --git a/.eslintrc.js b/.eslintrc.js
index d82bb95342..d0be97ad69 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -30,6 +30,7 @@ module.exports = {
     'plugin:jest/recommended',
     'airbnb',
     'plugin:@typescript-eslint/recommended',
+    'plugin:regexp/recommended',
     'prettier',
   ],
   settings: {
@@ -40,7 +41,7 @@ module.exports = {
     },
   },
   reportUnusedDisableDirectives: true,
-  plugins: ['react-hooks', 'header', 'jest', '@typescript-eslint'],
+  plugins: ['react-hooks', 'header', 'jest', '@typescript-eslint', 'regexp'],
   rules: {
     'array-callback-return': WARNING,
     camelcase: WARNING,
diff --git a/jest/snapshotPathNormalizer.js b/jest/snapshotPathNormalizer.js
index 1db7669d01..7d3fcd7d26 100644
--- a/jest/snapshotPathNormalizer.js
+++ b/jest/snapshotPathNormalizer.js
@@ -146,7 +146,7 @@ function normalizePaths(value) {
 
     // Convert win32 backslash's to forward slashes, \ -> /;
     // ignore some that look like escape sequences.
-    (val) => val.replace(/\\(?!["])/g, '/'),
+    (val) => val.replace(/\\(?!")/g, '/'),
   ];
 
   let result = value;
diff --git a/package.json b/package.json
index 50530105b8..a687ac54c4 100644
--- a/package.json
+++ b/package.json
@@ -89,6 +89,7 @@
     "eslint-plugin-jsx-a11y": "^6.5.1",
     "eslint-plugin-react": "^7.29.3",
     "eslint-plugin-react-hooks": "^4.3.0",
+    "eslint-plugin-regexp": "^1.5.1",
     "husky": "^7.0.4",
     "image-size": "^1.0.1",
     "jest": "^27.5.1",
diff --git a/packages/docusaurus-migrate/src/frontMatter.ts b/packages/docusaurus-migrate/src/frontMatter.ts
index 4905863cf5..2d03fb0e40 100644
--- a/packages/docusaurus-migrate/src/frontMatter.ts
+++ b/packages/docusaurus-migrate/src/frontMatter.ts
@@ -69,7 +69,7 @@ export function shouldQuotifyFrontMatter([key, value]: [
   // TODO this is not ideal to have to maintain such a list of allowed chars
   // maybe we should quotify if gray-matter throws instead?
   return !String(value).match(
-    // cSpell:ignore sàáâãäåçèéêëìíîïðòóôõöùúûüýÿ
-    /^[\w .\-sàáâãäåçèéêëìíîïðòóôõöùúûüýÿ!;,=+_?'`&#()[\]§%€$]+$/,
+    // cSpell:ignore àáâãäåçèéêëìíîïðòóôõöùúûüýÿ
+    /^[\w .\-àáâãäåçèéêëìíîïðòóôõöùúûüýÿ!;,=+?'`&#()[\]§%€$]+$/,
   );
 }
diff --git a/packages/docusaurus-migrate/src/index.ts b/packages/docusaurus-migrate/src/index.ts
index 6d527e44db..30c20e8269 100644
--- a/packages/docusaurus-migrate/src/index.ts
+++ b/packages/docusaurus-migrate/src/index.ts
@@ -451,7 +451,7 @@ async function handleVersioning(context: MigrationContext) {
       path.join(newDir, 'versions.json'),
     );
     const versions = loadedVersions.reverse();
-    const versionRegex = new RegExp(`version-(${versions.join('|')})-`, 'mgi');
+    const versionRegex = new RegExp(`version-(${versions.join('|')})-`, 'gim');
     await migrateVersionedSidebar(context, versions, versionRegex);
     await fs.mkdirp(path.join(newDir, 'versioned_docs'));
     await migrateVersionedDocs(context, versions, versionRegex);
diff --git a/packages/docusaurus-plugin-content-docs/src/__tests__/cli.test.ts b/packages/docusaurus-plugin-content-docs/src/__tests__/cli.test.ts
index 21d6faa7c0..8ca46aeb81 100644
--- a/packages/docusaurus-plugin-content-docs/src/__tests__/cli.test.ts
+++ b/packages/docusaurus-plugin-content-docs/src/__tests__/cli.test.ts
@@ -231,7 +231,7 @@ describe('docsVersion', () => {
     expect(versions).toEqual(['1.0.0']);
     expect(consoleMock).toHaveBeenCalledWith(
       expect.stringMatching(
-        /.*\[SUCCESS\].* .*\[docs\].*: version .*1\.0\.0.* created!.*/,
+        /.*\[SUCCESS\].*\[docs\].*: version .*1\.0\.0.* created!.*/,
       ),
     );
 
@@ -286,7 +286,7 @@ describe('docsVersion', () => {
     expect(versions).toEqual(['2.0.0', '1.0.1', '1.0.0', 'withSlugs']);
     expect(consoleMock).toHaveBeenCalledWith(
       expect.stringMatching(
-        /.*\[SUCCESS\].* .*\[docs\].*: version .*2\.0\.0.* created!.*/,
+        /.*\[SUCCESS\].*\[docs\].*: version .*2\.0\.0.* created!.*/,
       ),
     );
 
@@ -339,7 +339,7 @@ describe('docsVersion', () => {
     expect(versions).toEqual(['2.0.0', '1.0.0']);
     expect(consoleMock).toHaveBeenCalledWith(
       expect.stringMatching(
-        /.*\[SUCCESS\].* .*\[community\].*: version .*2.0.0.* created!.*/,
+        /.*\[SUCCESS\].*\[community\].*: version .*2.0.0.* created!.*/,
       ),
     );
 
diff --git a/packages/docusaurus-plugin-content-docs/src/cli.ts b/packages/docusaurus-plugin-content-docs/src/cli.ts
index ecb5ab0e59..2aaceff79b 100644
--- a/packages/docusaurus-plugin-content-docs/src/cli.ts
+++ b/packages/docusaurus-plugin-content-docs/src/cli.ts
@@ -88,7 +88,7 @@ export async function cliDocsVersionCommand(
   // Since we are going to create `version-${version}` folder, we need to make
   // sure it's a valid pathname.
   // eslint-disable-next-line no-control-regex
-  if (/[<>:"|?*\x00-\x1F]/g.test(version)) {
+  if (/[<>:"|?*\x00-\x1F]/.test(version)) {
     throw new Error(
       `${pluginIdLogPrefix}: invalid version tag specified! Please ensure its a valid pathname too. Try something like: 1.0.0.`,
     );
diff --git a/packages/docusaurus-plugin-content-docs/src/numberPrefix.ts b/packages/docusaurus-plugin-content-docs/src/numberPrefix.ts
index b91fc6d35b..a838d7667d 100644
--- a/packages/docusaurus-plugin-content-docs/src/numberPrefix.ts
+++ b/packages/docusaurus-plugin-content-docs/src/numberPrefix.ts
@@ -8,43 +8,33 @@
 import type {NumberPrefixParser} from '@docusaurus/plugin-content-docs';
 
 // Best-effort to avoid parsing some patterns as number prefix
-const IgnoredPrefixPatterns = (() => {
-  // ignore common date-like patterns: https://github.com/facebook/docusaurus/issues/4640
-  const DateLikePrefixRegex =
-    /^(?:\d{2}|\d{4})[-_.]\d{2}(?:[-_.](?:\d{2}|\d{4}))?.*$/;
+// ignore common date-like patterns: https://github.com/facebook/docusaurus/issues/4640
+// ignore common versioning patterns: https://github.com/facebook/docusaurus/issues/4653
+// Both of them would look like 7.0-foo or 2021-11-foo
+// note: we could try to parse float numbers in filenames, but that is probably
+// not worth it, as a version such as "8.0" can be interpreted as either a
+// version or a float. User can configure her own NumberPrefixParser if she
+// wants 8.0 to be interpreted as a float
+const ignoredPrefixPattern = /^\d+[-_.]\d+/;
 
-  // ignore common versioning patterns: https://github.com/facebook/docusaurus/issues/4653
-  // note: we could try to parse float numbers in filenames but that is
-  // probably not worth it as a version such as "8.0" can be interpreted as both
-  // a version and a float. User can configure her own NumberPrefixParser if
-  // she wants 8.0 to be interpreted as a float
-  const VersionLikePrefixRegex = /^\d+[-_.]\d+.*$/;
-
-  return new RegExp(
-    `${DateLikePrefixRegex.source}|${VersionLikePrefixRegex.source}`,
-  );
-})();
-
-const NumberPrefixRegex =
-  /^(?<numberPrefix>\d+)(?<separator>\s*[-_.]+\s*)(?<suffix>.*)$/;
+const numberPrefixPattern =
+  /^(?<numberPrefix>\d+)\s*[-_.]+\s*(?<suffix>[^-_.\s].*)$/;
 
 // 0-myDoc => {filename: myDoc, numberPrefix: 0}
 // 003 - myDoc => {filename: myDoc, numberPrefix: 3}
 export const DefaultNumberPrefixParser: NumberPrefixParser = (
   filename: string,
 ) => {
-  if (IgnoredPrefixPatterns.exec(filename)) {
+  if (ignoredPrefixPattern.test(filename)) {
+    return {filename, numberPrefix: undefined};
+  }
+  const match = numberPrefixPattern.exec(filename);
+  if (!match) {
     return {filename, numberPrefix: undefined};
   }
-  const match = NumberPrefixRegex.exec(filename);
-  const cleanFileName = match?.groups?.suffix ?? filename;
-  const numberPrefixString = match?.groups?.numberPrefix;
-  const numberPrefix = numberPrefixString
-    ? parseInt(numberPrefixString, 10)
-    : undefined;
   return {
-    filename: cleanFileName,
-    numberPrefix,
+    filename: match.groups!.suffix!,
+    numberPrefix: parseInt(match.groups!.numberPrefix!, 10),
   };
 };
 
diff --git a/packages/docusaurus-plugin-content-docs/src/sidebars/__tests__/generator.test.ts b/packages/docusaurus-plugin-content-docs/src/sidebars/__tests__/generator.test.ts
index a80aee0433..501774ef60 100644
--- a/packages/docusaurus-plugin-content-docs/src/sidebars/__tests__/generator.test.ts
+++ b/packages/docusaurus-plugin-content-docs/src/sidebars/__tests__/generator.test.ts
@@ -44,7 +44,7 @@ describe('DefaultSidebarItemsGenerator', () => {
     expect(sidebarSlice).toEqual([]);
     expect(consoleWarn).toHaveBeenCalledWith(
       expect.stringMatching(
-        /.*\[WARNING\].* No docs found in .*\..*: can't auto-generate a sidebar\..*/,
+        /.*\[WARNING\].* No docs found in [^.]*\..*: can't auto-generate a sidebar\..*/,
       ),
     );
   });
diff --git a/packages/docusaurus-plugin-content-docs/src/sidebars/__tests__/index.test.ts b/packages/docusaurus-plugin-content-docs/src/sidebars/__tests__/index.test.ts
index b57a044bae..ec19a5c4fb 100644
--- a/packages/docusaurus-plugin-content-docs/src/sidebars/__tests__/index.test.ts
+++ b/packages/docusaurus-plugin-content-docs/src/sidebars/__tests__/index.test.ts
@@ -134,12 +134,12 @@ describe('loadSidebars', () => {
     ).rejects.toThrowErrorMatchingInlineSnapshot(`"\\"foo\\" is not allowed"`);
     expect(consoleWarnMock).toBeCalledWith(
       expect.stringMatching(
-        /.*\[WARNING].* There are more than one category metadata files for .*foo.*: foo\/_category_.json, foo\/_category_.yml. The behavior is undetermined./,
+        /.*\[WARNING\].* There are more than one category metadata files for .*foo.*: foo\/_category_.json, foo\/_category_.yml. The behavior is undetermined./,
       ),
     );
     expect(consoleErrorMock).toBeCalledWith(
       expect.stringMatching(
-        /.*\[ERROR].* The docs sidebar category metadata file .*foo\/_category_.json.* looks invalid!/,
+        /.*\[ERROR\].* The docs sidebar category metadata file .*foo\/_category_.json.* looks invalid!/,
       ),
     );
   });
diff --git a/packages/docusaurus-theme-common/src/utils/codeBlockUtils.ts b/packages/docusaurus-theme-common/src/utils/codeBlockUtils.ts
index 1734ae5beb..3f4b2d7a2e 100644
--- a/packages/docusaurus-theme-common/src/utils/codeBlockUtils.ts
+++ b/packages/docusaurus-theme-common/src/utils/codeBlockUtils.ts
@@ -8,7 +8,7 @@
 import rangeParser from 'parse-numeric-range';
 
 const codeBlockTitleRegex = /title=(?<quote>["'])(?<title>.*?)\1/;
-const highlightLinesRangeRegex = /{(?<range>[\d,-]+)}/;
+const highlightLinesRangeRegex = /\{(?<range>[\d,-]+)\}/;
 
 const commentTypes = ['js', 'jsBlock', 'jsx', 'python', 'html'] as const;
 type CommentType = typeof commentTypes[number];
diff --git a/packages/docusaurus-utils-validation/src/validationSchemas.ts b/packages/docusaurus-utils-validation/src/validationSchemas.ts
index d89f65da80..d7b23b7cc8 100644
--- a/packages/docusaurus-utils-validation/src/validationSchemas.ts
+++ b/packages/docusaurus-utils-validation/src/validationSchemas.ts
@@ -11,7 +11,7 @@ import type {Tag} from '@docusaurus/utils';
 import {JoiFrontMatter} from './JoiFrontMatter';
 
 export const PluginIdSchema = Joi.string()
-  .regex(/^[a-zA-Z0-9_-]+$/)
+  .regex(/^[\w-]+$/)
   .message(
     'Illegal plugin ID value "{#value}": it should only contain alphanumerics, underscores, and dashes.',
   )
diff --git a/packages/docusaurus-utils/src/__tests__/jsUtils.test.ts b/packages/docusaurus-utils/src/__tests__/jsUtils.test.ts
index 1092e85ff7..6e7e4c99e3 100644
--- a/packages/docusaurus-utils/src/__tests__/jsUtils.test.ts
+++ b/packages/docusaurus-utils/src/__tests__/jsUtils.test.ts
@@ -169,14 +169,16 @@ describe('reportMessage', () => {
       `"Unexpected \\"reportingSeverity\\" value: foo."`,
     );
     expect(consoleLog).toBeCalledTimes(1);
-    expect(consoleLog).toBeCalledWith(expect.stringMatching(/.*\[INFO].* hey/));
+    expect(consoleLog).toBeCalledWith(
+      expect.stringMatching(/.*\[INFO\].* hey/),
+    );
     expect(consoleWarn).toBeCalledTimes(1);
     expect(consoleWarn).toBeCalledWith(
-      expect.stringMatching(/.*\[WARNING].* hey/),
+      expect.stringMatching(/.*\[WARNING\].* hey/),
     );
     expect(consoleError).toBeCalledTimes(1);
     expect(consoleError).toBeCalledWith(
-      expect.stringMatching(/.*\[ERROR].* hey/),
+      expect.stringMatching(/.*\[ERROR\].* hey/),
     );
   });
 });
diff --git a/packages/docusaurus-utils/src/__tests__/markdownParser.test.ts b/packages/docusaurus-utils/src/__tests__/markdownParser.test.ts
index 01999c82c7..a3de772987 100644
--- a/packages/docusaurus-utils/src/__tests__/markdownParser.test.ts
+++ b/packages/docusaurus-utils/src/__tests__/markdownParser.test.ts
@@ -404,7 +404,7 @@ Lorem Ipsum
     expect(
       parseMarkdownContentTitle(markdown, {removeContentTitle: true}),
     ).toEqual({
-      content: markdown.trim().replace('# Markdown Title', ''),
+      content: markdown.trim().replace('# Markdown Title\n', ''),
       contentTitle: 'Markdown Title',
     });
   });
@@ -444,7 +444,7 @@ Lorem Ipsum
     expect(
       parseMarkdownContentTitle(markdown, {removeContentTitle: true}),
     ).toEqual({
-      content: markdown.replace('Markdown Title\n==============\n\n', ''),
+      content: markdown.replace('Markdown Title\n==============\n', ''),
       contentTitle: 'Markdown Title',
     });
   });
@@ -547,7 +547,7 @@ Lorem Ipsum
     expect(
       parseMarkdownContentTitle(markdown, {removeContentTitle: true}),
     ).toEqual({
-      content: markdown.replace('# Markdown Title', ''),
+      content: markdown.replace('# Markdown Title\n', ''),
       contentTitle: 'Markdown Title',
     });
   });
diff --git a/packages/docusaurus-utils/src/markdownLinks.ts b/packages/docusaurus-utils/src/markdownLinks.ts
index e9eed1a7e6..afbd7170ce 100644
--- a/packages/docusaurus-utils/src/markdownLinks.ts
+++ b/packages/docusaurus-utils/src/markdownLinks.ts
@@ -68,7 +68,7 @@ export function replaceMarkdownLinks<T extends ContentPaths>({
     // ink
     // [doc1]: doc1.md -> we replace this doc1.md with correct link
     const mdRegex =
-      /(?:(?:\]\()|(?:\]:\s*))(?!https?:\/\/|@site\/)(?<filename>[^'")\]\s>]+\.mdx?)/g;
+      /(?:\]\(|\]:\s*)(?!https?:\/\/|@site\/)(?<filename>[^'")\]\s>]+\.mdx?)/g;
     let mdMatch = mdRegex.exec(modifiedLine);
     while (mdMatch !== null) {
       // Replace it to correct html link.
diff --git a/packages/docusaurus-utils/src/markdownParser.ts b/packages/docusaurus-utils/src/markdownParser.ts
index 108300c107..354461b414 100644
--- a/packages/docusaurus-utils/src/markdownParser.ts
+++ b/packages/docusaurus-utils/src/markdownParser.ts
@@ -14,11 +14,11 @@ export function parseMarkdownHeadingId(heading: string): {
   text: string;
   id?: string;
 } {
-  const customHeadingIdRegex = /^(?<text>.*?)\s*\{#(?<id>[\w-]+)\}$/;
+  const customHeadingIdRegex = /\s*\{#(?<id>[\w-]+)\}$/;
   const matches = customHeadingIdRegex.exec(heading);
   if (matches) {
     return {
-      text: matches.groups!.text!,
+      text: heading.replace(matches[0]!, ''),
       id: matches.groups!.id!,
     };
   }
@@ -69,9 +69,9 @@ export function createExcerpt(fileString: string): string | undefined {
       // Remove HTML tags.
       .replace(/<[^>]*>/g, '')
       // Remove Title headers
-      .replace(/^#\s*[^#]*\s*#?/gm, '')
+      .replace(/^#[^#]+#?/gm, '')
       // Remove Markdown + ATX-style headers
-      .replace(/^#{1,6}\s*(?<text>[^#]*)\s*(?:#{1,6})?/gm, '$1')
+      .replace(/^#{1,6}\s*(?<text>[^#]*)\s*#{0,6}/gm, '$1')
       // Remove emphasis.
       .replace(/(?<opening>[*_]{1,3})(?<text>.*?)\1/g, '$2')
       // Remove strikethroughs.
@@ -79,7 +79,7 @@ export function createExcerpt(fileString: string): string | undefined {
       // Remove images.
       .replace(/!\[(?<alt>.*?)\][[(].*?[\])]/g, '$1')
       // Remove footnotes.
-      .replace(/\[\^.+?\](?:: .*?$)?/g, '')
+      .replace(/\[\^.+?\](?:: .*$)?/g, '')
       // Remove inline links.
       .replace(/\[(?<alt>.*?)\][[(].*?[\])]/g, '$1')
       // Remove inline code.
@@ -91,7 +91,7 @@ export function createExcerpt(fileString: string): string | undefined {
       // Remove Emoji names within colons include preceding whitespace.
       .replace(/\s?:(?:::|[^:\n])+:/g, '')
       // Remove custom Markdown heading id.
-      .replace(/{#*[\w-]+}/, '')
+      .replace(/\{#*[\w-]+\}/, '')
       .trim();
 
     if (cleanedLine) {
@@ -132,35 +132,42 @@ export function parseMarkdownContentTitle(
   const removeContentTitleOption = options?.removeContentTitle ?? false;
 
   const content = contentUntrimmed.trim();
+  // We only need to detect import statements that will be parsed by MDX as
+  // `import` nodes, as broken syntax can't render anyways. That means any block
+  // that has `import` at the very beginning and surrounded by empty lines.
+  const contentWithoutImport = content
+    .replace(/^(?:import\s(?:.|\n(?!\n))*\n{2,})*/, '')
+    .trim();
 
-  const IMPORT_STATEMENT =
-    /import\s+(?:[\w*{}\s\n,]+from\s+)?["'\s][@\w/_.-]+["'\s];?|\n/.source;
-  const REGULAR_TITLE =
-    /(?<pattern>#\s*(?<title>[^#\n{]*)+[ \t]*(?<suffix>(?:{#*[\w-]+})|#)?\n*?)/
-      .source;
-  const ALTERNATE_TITLE = /(?<pattern>\s*(?<title>[^\n]*)\s*\n[=]+)/.source;
-
-  const regularTitleMatch = new RegExp(
-    `^(?:${IMPORT_STATEMENT})*?${REGULAR_TITLE}`,
-    'g',
-  ).exec(content);
-  const alternateTitleMatch = new RegExp(
-    `^(?:${IMPORT_STATEMENT})*?${ALTERNATE_TITLE}`,
-    'g',
-  ).exec(content);
+  const regularTitleMatch = /^#[ \t]+(?<title>[^ \t].*)(?:\n|$)/.exec(
+    contentWithoutImport,
+  );
+  const alternateTitleMatch = /^(?<title>.*)\n=+(?:\n|$)/.exec(
+    contentWithoutImport,
+  );
 
   const titleMatch = regularTitleMatch ?? alternateTitleMatch;
-  const {pattern, title} = titleMatch?.groups ?? {};
-
-  if (!pattern || !title) {
+  if (!titleMatch) {
     return {content, contentTitle: undefined};
   }
   const newContent = removeContentTitleOption
-    ? content.replace(pattern, '')
+    ? content.replace(titleMatch[0]!, '')
     : content;
+  if (regularTitleMatch) {
+    return {
+      content: newContent.trim(),
+      contentTitle: toTextContentTitle(
+        regularTitleMatch
+          .groups!.title!.trim()
+          .replace(/\s*(?:\{#*[\w-]+\}|#+)$/, ''),
+      ).trim(),
+    };
+  }
   return {
     content: newContent.trim(),
-    contentTitle: toTextContentTitle(title.trim()).trim(),
+    contentTitle: toTextContentTitle(
+      alternateTitleMatch!.groups!.title!.trim().replace(/\s*=+$/, ''),
+    ).trim(),
   };
 }
 
diff --git a/packages/docusaurus-utils/src/urlUtils.ts b/packages/docusaurus-utils/src/urlUtils.ts
index 0f1d24f540..a083a330b8 100644
--- a/packages/docusaurus-utils/src/urlUtils.ts
+++ b/packages/docusaurus-utils/src/urlUtils.ts
@@ -58,7 +58,7 @@ export function normalizeUrl(rawUrls: string[]): string {
       if (i > 0) {
         // Removing the starting slashes for each component but the first.
         component = component.replace(
-          /^[/]+/,
+          /^\/+/,
           // Special case where the first element of rawUrls is empty
           // ["", "/hello"] => /hello
           component[0] === '/' && !hasStartingSlash ? '/' : '',
@@ -68,7 +68,7 @@ export function normalizeUrl(rawUrls: string[]): string {
       hasEndingSlash = component[component.length - 1] === '/';
       // Removing the ending slashes for each component but the last. For the
       // last component we will combine multiple slashes to a single one.
-      component = component.replace(/[/]+$/, i < urls.length - 1 ? '' : '/');
+      component = component.replace(/\/+$/, i < urls.length - 1 ? '' : '/');
     }
 
     hasStartingSlash = true;
diff --git a/packages/docusaurus/src/client/exports/Interpolate.tsx b/packages/docusaurus/src/client/exports/Interpolate.tsx
index 5b290d6054..076c7b1abc 100644
--- a/packages/docusaurus/src/client/exports/Interpolate.tsx
+++ b/packages/docusaurus/src/client/exports/Interpolate.tsx
@@ -18,7 +18,7 @@ We don't ship a markdown parser nor a feature-complete i18n library on purpose.
 More details here: https://github.com/facebook/docusaurus/pull/4295
 */
 
-const ValueRegexp = /{\w+}/g;
+const ValueRegexp = /\{\w+\}/g;
 const ValueFoundMarker = '{}'; // does not care much
 
 // If all the values are plain strings, then interpolate returns a simple string
diff --git a/packages/docusaurus/src/commands/deploy.ts b/packages/docusaurus/src/commands/deploy.ts
index fdd28ef0b2..6270eb3d29 100644
--- a/packages/docusaurus/src/commands/deploy.ts
+++ b/packages/docusaurus/src/commands/deploy.ts
@@ -66,7 +66,7 @@ export function hasSSHProtocol(sourceRepoUrl: string): boolean {
     return false;
   } catch {
     // Fails when there isn't a protocol
-    return /^(?:[\w-]+@)?[\w.-]+:[\w./_-]+/.test(sourceRepoUrl); // git@github.com:facebook/docusaurus.git
+    return /^(?:[\w-]+@)?[\w.-]+:[\w./-]+/.test(sourceRepoUrl); // git@github.com:facebook/docusaurus.git
   }
 }
 
diff --git a/website/src/plugins/changelog/index.js b/website/src/plugins/changelog/index.js
index 58a7bb2f65..310b1ebc36 100644
--- a/website/src/plugins/changelog/index.js
+++ b/website/src/plugins/changelog/index.js
@@ -37,7 +37,7 @@ function processSection(section) {
     .trim()
     .replace('running_woman', 'running');
 
-  let authors = content.match(/## Committers: \d+.*/ms);
+  let authors = content.match(/## Committers: \d.*/s);
   if (authors) {
     authors = authors[0]
       .match(/- .*/g)
@@ -105,7 +105,7 @@ async function ChangelogPlugin(context, options) {
     async loadContent() {
       const fileContent = await fs.readFile(changelogPath, 'utf-8');
       const sections = fileContent
-        .split(/(?=\n## )/ms)
+        .split(/(?=\n## )/)
         .map(processSection)
         .filter(Boolean);
       await Promise.all(
diff --git a/website/src/remark/configTabs.mjs b/website/src/remark/configTabs.mjs
index ec4e8de8ce..3da56b4ba8 100644
--- a/website/src/remark/configTabs.mjs
+++ b/website/src/remark/configTabs.mjs
@@ -30,7 +30,7 @@ export default function plugin() {
         const {
           groups: {presetOptionName, presetOptionText},
         } = presetMeta.match(
-          /\/\/(?<presetOptionText>.*?): (?<presetOptionName>[A-Za-z]+)/i,
+          /\/\/(?<presetOptionText>.*?): (?<presetOptionName>[A-Z]+)/i,
         ) ?? {
           groups: {
             presetOptionName: '[translation failure]',
@@ -40,7 +40,7 @@ export default function plugin() {
         const {
           groups: {pluginName, pluginText},
         } = pluginMeta.match(
-          /\/\/(?<pluginText>.*?): (?<pluginName>[A-Za-z@/-]+)/i,
+          /\/\/(?<pluginText>.*?): (?<pluginName>[A-Z@/-]+)/i,
         ) ?? {
           groups: {
             pluginName: '[translation failure]',
diff --git a/website/src/utils/colorUtils.ts b/website/src/utils/colorUtils.ts
index 431b233960..78c4895c4b 100644
--- a/website/src/utils/colorUtils.ts
+++ b/website/src/utils/colorUtils.ts
@@ -100,7 +100,7 @@ export function updateDOMColors(
   isDarkTheme: boolean,
 ): void {
   const styleSheet = Array.from(document.styleSheets).find((item) =>
-    item.href?.match(/styles(?:\.[0-9a-f]+)?\.css/),
+    item.href?.match(/styles(?:\.[\da-f]+)?\.css/),
   )!;
   const rules = Array.from(styleSheet.cssRules) as CSSStyleRule[];
   // The rule that looks the most like definition for custom theme colors
diff --git a/yarn.lock b/yarn.lock
index d09778ac0c..fdb25727eb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6559,6 +6559,11 @@ comment-json@^4.2.2:
     has-own-prop "^2.0.0"
     repeat-string "^1.6.1"
 
+comment-parser@^1.1.2:
+  version "1.3.0"
+  resolved "https://registry.npmmirror.com/comment-parser/-/comment-parser-1.3.0.tgz#68beb7dbe0849295309b376406730cd16c719c44"
+  integrity sha512-hRpmWIKgzd81vn0ydoWoyPoALEOnF4wt8yKD35Ib1D6XC2siLiYaiqfGkYrunuKdsXGwpBpHU3+9r+RVw2NZfA==
+
 common-path-prefix@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/common-path-prefix/-/common-path-prefix-3.0.0.tgz#7d007a7e07c58c4b4d5f433131a19141b29f11e0"
@@ -8452,6 +8457,20 @@ eslint-plugin-react@^7.29.3:
     semver "^6.3.0"
     string.prototype.matchall "^4.0.6"
 
+eslint-plugin-regexp@^1.5.1:
+  version "1.5.1"
+  resolved "https://registry.npmmirror.com/eslint-plugin-regexp/-/eslint-plugin-regexp-1.5.1.tgz#982ea8936283035897d6bb1ba32c0ea5d9a4dee0"
+  integrity sha512-5v0rQIi54m2KycQHqmOAHrZhvI56GHmI2acr6zEffAqfeifTtobAEapv9Uf4o8//lGvwVkHKyjLoSbBNEFcfOA==
+  dependencies:
+    comment-parser "^1.1.2"
+    eslint-utils "^3.0.0"
+    grapheme-splitter "^1.0.4"
+    jsdoctypeparser "^9.0.0"
+    refa "^0.9.0"
+    regexp-ast-analysis "^0.3.0"
+    regexpp "^3.2.0"
+    scslre "^0.1.6"
+
 eslint-scope@5.1.1, eslint-scope@^5.1.1:
   version "5.1.1"
   resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-5.1.1.tgz#e786e59a66cb92b3f6c1fb0d508aab174848f48c"
@@ -9889,6 +9908,11 @@ graceful-fs@^4.1.10, graceful-fs@^4.1.11, graceful-fs@^4.1.15, graceful-fs@^4.1.
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.9.tgz#041b05df45755e587a24942279b9d113146e1c96"
   integrity sha512-NtNxqUcXgpW2iMrfqSfR73Glt39K+BLwWsPs94yR63v45T0Wbej7eRmL5cWfwEgqXnmjQp3zaJTshdRW/qC2ZQ==
 
+grapheme-splitter@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.npmmirror.com/grapheme-splitter/-/grapheme-splitter-1.0.4.tgz#9cf3a665c6247479896834af35cf1dbb4400767e"
+  integrity sha512-bzh50DW9kTPM00T8y4o8vQg89Di9oLJVLW/KaOGIXJWP/iqCN6WKYkbNOF04vFLJhwcpYUh9ydh/+5vpOqV4YQ==
+
 graphql@16.0.0:
   version "16.0.0"
   resolved "https://registry.yarnpkg.com/graphql/-/graphql-16.0.0.tgz#5724f2767aefa543418e83671372117c39408c8f"
@@ -11869,6 +11893,11 @@ jscodeshift@^0.13.0:
     temp "^0.8.4"
     write-file-atomic "^2.3.0"
 
+jsdoctypeparser@^9.0.0:
+  version "9.0.0"
+  resolved "https://registry.npmmirror.com/jsdoctypeparser/-/jsdoctypeparser-9.0.0.tgz#8c97e2fb69315eb274b0f01377eaa5c940bd7b26"
+  integrity sha512-jrTA2jJIL6/DAEILBEh2/w9QxCuwmvNXIry39Ay/HVfhE3o2yVV0U44blYkqdHA/OKloJEqvJy0xU+GSdE2SIw==
+
 jsdom@^16.6.0:
   version "16.7.0"
   resolved "https://registry.yarnpkg.com/jsdom/-/jsdom-16.7.0.tgz#918ae71965424b197c819f8183a754e18977b710"
@@ -16204,6 +16233,13 @@ redent@^3.0.0:
     indent-string "^4.0.0"
     strip-indent "^3.0.0"
 
+refa@^0.9.0:
+  version "0.9.1"
+  resolved "https://registry.npmmirror.com/refa/-/refa-0.9.1.tgz#12731fce378d235731b1f73182b20083c8a75ca8"
+  integrity sha512-egU8LgFq2VXlAfUi8Jcbr5X38wEOadMFf8tCbshgcpVCYlE7k84pJOSlnvXF+muDB4igkdVMq7Z/kiNPqDT9TA==
+  dependencies:
+    regexpp "^3.2.0"
+
 regenerate-unicode-properties@^10.0.1:
   version "10.0.1"
   resolved "https://registry.yarnpkg.com/regenerate-unicode-properties/-/regenerate-unicode-properties-10.0.1.tgz#7f442732aa7934a3740c779bb9b3340dccc1fb56"
@@ -16243,6 +16279,22 @@ regex-not@^1.0.0, regex-not@^1.0.2:
     extend-shallow "^3.0.2"
     safe-regex "^1.1.0"
 
+regexp-ast-analysis@^0.2.3:
+  version "0.2.4"
+  resolved "https://registry.npmmirror.com/regexp-ast-analysis/-/regexp-ast-analysis-0.2.4.tgz#a497a7c8bfbba51438693821e4b0e3ed43e20f1b"
+  integrity sha512-8L7kOZQaKPxKKAwGuUZxTQtlO3WZ+tiXy4s6G6PKL6trbOXcZoumwC3AOHHFtI/xoSbNxt7jgLvCnP1UADLWqg==
+  dependencies:
+    refa "^0.9.0"
+    regexpp "^3.2.0"
+
+regexp-ast-analysis@^0.3.0:
+  version "0.3.0"
+  resolved "https://registry.npmmirror.com/regexp-ast-analysis/-/regexp-ast-analysis-0.3.0.tgz#386f177dfe5abc5ac58b51eb5962beac64e898ce"
+  integrity sha512-11PlbBSUxwWpdj6BdZUKfhDdV9g+cveqHB+BqBQDBD7ZermDBVgtyowUaXTvT0dO3tZYo2bDIr/GoED6X1aYSA==
+  dependencies:
+    refa "^0.9.0"
+    regexpp "^3.2.0"
+
 regexp.prototype.flags@^1.2.0, regexp.prototype.flags@^1.3.1:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/regexp.prototype.flags/-/regexp.prototype.flags-1.4.1.tgz#b3f4c0059af9e47eca9f3f660e51d81307e72307"
@@ -16868,6 +16920,15 @@ screenfull@^5.1.0:
   resolved "https://registry.yarnpkg.com/screenfull/-/screenfull-5.2.0.tgz#6533d524d30621fc1283b9692146f3f13a93d1ba"
   integrity sha512-9BakfsO2aUQN2K9Fdbj87RJIEZ82Q9IGim7FqM5OsebfoFC6ZHXgDq/KvniuLTPdeM8wY2o6Dj3WQ7KeQCj3cA==
 
+scslre@^0.1.6:
+  version "0.1.6"
+  resolved "https://registry.npmmirror.com/scslre/-/scslre-0.1.6.tgz#71a2832e4bf3a9254973a04fbed90aec94f75757"
+  integrity sha512-JORxVRlQTfjvlOAaiQKebgFElyAm5/W8b50lgaZ0OkEnKnagJW2ufDh3xRfU75UD9z3FGIu1gL1IyR3Poa6Qmw==
+  dependencies:
+    refa "^0.9.0"
+    regexp-ast-analysis "^0.2.3"
+    regexpp "^3.2.0"
+
 section-matter@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/section-matter/-/section-matter-1.0.0.tgz#e9041953506780ec01d59f292a19c7b850b84167"