diff --git a/.eslintrc.cjs b/.eslintrc.cjs
index c3e825cfc1..a5e9f80d80 100644
--- a/.eslintrc.cjs
+++ b/.eslintrc.cjs
@@ -7,13 +7,14 @@ module.exports = {
     'plugin:@typescript-eslint/recommended-type-checked',
     'plugin:@typescript-eslint/stylistic-type-checked',
     'prettier',
+    'plugin:regexp/recommended',
   ],
   parser: '@typescript-eslint/parser',
   parserOptions: {
     project: ['./packages/*/tsconfig.json', './tsconfig.eslint.json'],
     tsconfigRootDir: __dirname,
   },
-  plugins: ['@typescript-eslint', 'prettier', 'no-only-tests'],
+  plugins: ['@typescript-eslint', 'prettier', 'no-only-tests', 'regexp'],
   rules: {
     // These off/configured-differently-by-default rules fit well for us
     '@typescript-eslint/switch-exhaustiveness-check': 'error',
@@ -72,6 +73,9 @@ module.exports = {
     // These rules enabled by the preset configs don't work well for us
     '@typescript-eslint/await-thenable': 'off',
     'prefer-const': 'off',
+
+    // In some cases, using explicit letter-casing is more performant than the `i` flag
+    'regexp/use-ignore-case': 'off',
   },
   overrides: [
     {
diff --git a/package.json b/package.json
index f85212d923..d26d4fac25 100644
--- a/package.json
+++ b/package.json
@@ -59,12 +59,13 @@
     "eslint-config-prettier": "^9.0.0",
     "eslint-plugin-no-only-tests": "^3.1.0",
     "eslint-plugin-prettier": "^5.0.0",
+    "eslint-plugin-regexp": "^2.2.0",
+    "globby": "^14.0.0",
     "only-allow": "^1.1.1",
     "organize-imports-cli": "^0.10.0",
     "prettier": "^3.1.0",
     "prettier-plugin-astro": "^0.12.2",
     "tiny-glob": "^0.2.9",
-    "globby": "^14.0.0",
     "turbo": "^1.10.12",
     "typescript": "~5.2.2"
   },
diff --git a/packages/astro-prism/src/plugin.ts b/packages/astro-prism/src/plugin.ts
index cbee66c337..a50b9d7ef6 100644
--- a/packages/astro-prism/src/plugin.ts
+++ b/packages/astro-prism/src/plugin.ts
@@ -16,6 +16,7 @@ export function addAstro(Prism: typeof import('prismjs')) {
 
 	let script = Prism.util.clone(Prism.languages[scriptLang]);
 
+	// eslint-disable-next-line regexp/no-useless-assertions
 	let space = /(?:\s|\/\/.*(?!.)|\/\*(?:[^*]|\*(?!\/))\*\/)/.source;
 	let braces = /(?:\{(?:\{(?:\{[^{}]*\}|[^{}])*\}|[^{}])*\})/.source;
 	let spread = /(?:\{<S>*\.{3}(?:[^{}]|<BRACES>)*\})/.source;
@@ -39,13 +40,13 @@ export function addAstro(Prism: typeof import('prismjs')) {
 	Prism.languages.astro = Prism.languages.extend('markup', script);
 
 	(Prism.languages.astro as any).tag.pattern = re(
-		/<\/?(?:[\w.:-]+(?:<S>+(?:[\w.:$-]+(?:=(?:"(?:\\[^]|[^\\"])*"|'(?:\\[^]|[^\\'])*'|[^\s{'"/>=]+|<BRACES>))?|<SPREAD>))*<S>*\/?)?>/
+		/<\/?(?:[\w.:-]+(?:<S>+(?:[\w.:$-]+(?:=(?:"(?:\\[\s\S]|[^\\"])*"|'(?:\\[\s\S]|[^\\'])*'|[^\s{'"/>=]+|<BRACES>))?|<SPREAD>))*<S>*\/?)?>/
 			.source
 	);
 
-	(Prism.languages.astro as any).tag.inside['tag'].pattern = /^<\/?[^\s>\/]*/i;
+	(Prism.languages.astro as any).tag.inside['tag'].pattern = /^<\/?[^\s>/]*/;
 	(Prism.languages.astro as any).tag.inside['attr-value'].pattern =
-		/=(?!\{)(?:"(?:\\[^]|[^\\"])*"|'(?:\\[^]|[^\\'])*'|[^\s'">]+)/i;
+		/=(?!\{)(?:"(?:\\[\s\S]|[^\\"])*"|'(?:\\[\s\S]|[^\\'])*'|[^\s'">]+)/;
 	(Prism.languages.astro as any).tag.inside['tag'].inside['class-name'] =
 		/^[A-Z]\w*(?:\.[A-Z]\w*)*$/;
 	(Prism.languages.astro as any).tag.inside['comment'] = script['comment'];
@@ -71,7 +72,7 @@ export function addAstro(Prism: typeof import('prismjs')) {
 				pattern: re(/=<BRACES>/.source),
 				inside: {
 					'script-punctuation': {
-						pattern: /^=(?={)/,
+						pattern: /^=(?=\{)/,
 						alias: 'punctuation',
 					},
 					rest: Prism.languages.astro,
diff --git a/packages/astro-rss/src/util.ts b/packages/astro-rss/src/util.ts
index bc15897807..1e49b3d775 100644
--- a/packages/astro-rss/src/util.ts
+++ b/packages/astro-rss/src/util.ts
@@ -10,10 +10,10 @@ export function createCanonicalURL(
 	let pathname = url.replace(/\/index.html$/, ''); // index.html is not canonical
 	if (trailingSlash === false) {
 		// remove the trailing slash
-		pathname = pathname.replace(/(\/+)?$/, '');
+		pathname = pathname.replace(/\/*$/, '');
 	} else if (!getUrlExtension(url)) {
 		// add trailing slash if there’s no extension or `trailingSlash` is true
-		pathname = pathname.replace(/(\/+)?$/, '/');
+		pathname = pathname.replace(/\/*$/, '/');
 	}
 
 	pathname = pathname.replace(/\/+/g, '/'); // remove duplicate slashes (URL() won’t)
diff --git a/packages/astro/src/assets/services/vendor/squoosh/codecs.ts b/packages/astro/src/assets/services/vendor/squoosh/codecs.ts
index 80aae75207..e4705e10b9 100644
--- a/packages/astro/src/assets/services/vendor/squoosh/codecs.ts
+++ b/packages/astro/src/assets/services/vendor/squoosh/codecs.ts
@@ -291,6 +291,8 @@ export const codecs = {
   avif: {
     name: 'AVIF',
     extension: 'avif',
+    // Disable eslint rule to not touch the original code
+    // eslint-disable-next-line no-control-regex, regexp/control-character-escape
     detectors: [/^\x00\x00\x00 ftypavif\x00\x00\x00\x00/],
     dec: () =>
       instantiateEmscriptenWasm(avifDec as DecodeModuleFactory, avifDecWasm),
@@ -321,6 +323,8 @@ export const codecs = {
   oxipng: {
     name: 'OxiPNG',
     extension: 'png',
+    // Disable eslint rule to not touch the original code
+    // eslint-disable-next-line no-control-regex, regexp/control-character-escape
     detectors: [/^\x89PNG\x0D\x0A\x1A\x0A/],
     dec: async () => {
       await pngEncDecInit()
diff --git a/packages/astro/src/cli/add/index.ts b/packages/astro/src/cli/add/index.ts
index b8cb1949cd..e1b64eb185 100644
--- a/packages/astro/src/cli/add/index.ts
+++ b/packages/astro/src/cli/add/index.ts
@@ -384,11 +384,11 @@ const toIdent = (name: string) => {
 	const ident = name
 		.trim()
 		// Remove astro or (astrojs) prefix and suffix
-		.replace(/[-_\.\/]?astro(?:js)?[-_\.]?/g, '')
+		.replace(/[-_./]?astro(?:js)?[-_.]?/g, '')
 		// drop .js suffix
 		.replace(/\.js/, '')
 		// convert to camel case
-		.replace(/(?:[\.\-\_\/]+)([a-zA-Z])/g, (_, w) => w.toUpperCase())
+		.replace(/[.\-_/]+([a-zA-Z])/g, (_, w) => w.toUpperCase())
 		// drop invalid first characters
 		.replace(/^[^a-zA-Z$_]+/, '');
 	return `${ident[0].toLowerCase()}${ident.slice(1)}`;
diff --git a/packages/astro/src/core/build/css-asset-name.ts b/packages/astro/src/core/build/css-asset-name.ts
index 29fc14294e..64852b366a 100644
--- a/packages/astro/src/core/build/css-asset-name.ts
+++ b/packages/astro/src/core/build/css-asset-name.ts
@@ -103,7 +103,7 @@ function getFirstParentId(parents: [ModuleInfo, number, number][]) {
 	return parents[0]?.[0].id;
 }
 
-const charsToReplaceRe = /[.\[\]]/g;
+const charsToReplaceRe = /[.[\]]/g;
 const underscoresRe = /_+/g;
 /**
  * Prettify base names so they're easier to read:
diff --git a/packages/astro/src/core/build/plugins/plugin-manifest.ts b/packages/astro/src/core/build/plugins/plugin-manifest.ts
index e5a1c1b065..6b54135835 100644
--- a/packages/astro/src/core/build/plugins/plugin-manifest.ts
+++ b/packages/astro/src/core/build/plugins/plugin-manifest.ts
@@ -19,7 +19,7 @@ import type { StaticBuildOptions } from '../types.js';
 import { normalizeTheLocale } from '../../../i18n/index.js';
 
 const manifestReplace = '@@ASTRO_MANIFEST_REPLACE@@';
-const replaceExp = new RegExp(`['"](${manifestReplace})['"]`, 'g');
+const replaceExp = new RegExp(`['"]${manifestReplace}['"]`, 'g');
 
 export const SSR_MANIFEST_VIRTUAL_MODULE_ID = '@astrojs-manifest';
 export const RESOLVED_SSR_MANIFEST_VIRTUAL_MODULE_ID = '\0' + SSR_MANIFEST_VIRTUAL_MODULE_ID;
diff --git a/packages/astro/src/core/build/static-build.ts b/packages/astro/src/core/build/static-build.ts
index a1278c8033..3fc40035d6 100644
--- a/packages/astro/src/core/build/static-build.ts
+++ b/packages/astro/src/core/build/static-build.ts
@@ -524,7 +524,7 @@ export function makeAstroPageEntryPointFileName(
 	const name = route?.route ?? pageModuleId;
 	return `pages${name
 		.replace(/\/$/, '/index')
-		.replaceAll(/[\[\]]/g, '_')
+		.replaceAll(/[[\]]/g, '_')
 		.replaceAll('...', '---')}.astro.mjs`;
 }
 
diff --git a/packages/astro/src/core/create-vite.ts b/packages/astro/src/core/create-vite.ts
index 0b0c7d47ff..b2de6afb5c 100644
--- a/packages/astro/src/core/create-vite.ts
+++ b/packages/astro/src/core/create-vite.ts
@@ -90,7 +90,7 @@ export async function createVite(
 				pkgJson.keywords?.includes('astro') ||
 				pkgJson.keywords?.includes('astro-component') ||
 				// Attempt: package is named `astro-something` or `@scope/astro-something`. ✅ Likely a community package
-				/^(@[^\/]+\/)?astro\-/.test(pkgJson.name)
+				/^(?:@[^/]+\/)?astro-/.test(pkgJson.name)
 			);
 		},
 		isFrameworkPkgByName(pkgName) {
diff --git a/packages/astro/src/core/dev/restart.ts b/packages/astro/src/core/dev/restart.ts
index 23e6af369a..7a1b15ed05 100644
--- a/packages/astro/src/core/dev/restart.ts
+++ b/packages/astro/src/core/dev/restart.ts
@@ -29,8 +29,8 @@ async function createRestartedContainer(
 	return newContainer;
 }
 
-const configRE = new RegExp(`.*astro\.config\.((mjs)|(cjs)|(js)|(ts))$`);
-const preferencesRE = new RegExp(`.*\.astro\/settings\.json$`);
+const configRE = /.*astro.config.(?:mjs|cjs|js|ts)$/;
+const preferencesRE = /.*\.astro\/settings.json$/;
 
 export function shouldRestartContainer(
 	{ settings, inlineConfig, restartInFlight }: Container,
diff --git a/packages/astro/src/core/errors/dev/utils.ts b/packages/astro/src/core/errors/dev/utils.ts
index cda9e4227f..c391e462b0 100644
--- a/packages/astro/src/core/errors/dev/utils.ts
+++ b/packages/astro/src/core/errors/dev/utils.ts
@@ -132,7 +132,7 @@ export function collectErrorMetadata(e: any, rootFolder?: URL | undefined): Erro
 function generateHint(err: ErrorWithMetadata): string | undefined {
 	const commonBrowserAPIs = ['document', 'window'];
 
-	if (/Unknown file extension \"\.(jsx|vue|svelte|astro|css)\" for /.test(err.message)) {
+	if (/Unknown file extension "\.(?:jsx|vue|svelte|astro|css)" for /.test(err.message)) {
 		return 'You likely need to add this package to `vite.ssr.noExternal` in your astro config file.';
 	} else if (commonBrowserAPIs.some((api) => err.toString().includes(api))) {
 		const hint = `Browser APIs are not available on the server.
@@ -172,10 +172,12 @@ function collectInfoFromStacktrace(error: SSRError & { stack: string }): StackIn
 			error.id ||
 			// TODO: this could be better, `src` might be something else
 			stackText.split('\n').find((ln) => ln.includes('src') || ln.includes('node_modules'));
+		// Disable eslint as we're not sure how to improve this regex yet
+		// eslint-disable-next-line regexp/no-super-linear-backtracking
 		const source = possibleFilePath?.replace(/^[^(]+\(([^)]+).*$/, '$1').replace(/^\s+at\s+/, '');
 
-		let file = source?.replace(/(:[0-9]+)/g, '');
-		const location = /:([0-9]+):([0-9]+)/g.exec(source!) ?? [];
+		let file = source?.replace(/:\d+/g, '');
+		const location = /:(\d+):(\d+)/.exec(source!) ?? [];
 		const line = location[1];
 		const column = location[2];
 
@@ -195,8 +197,8 @@ function collectInfoFromStacktrace(error: SSRError & { stack: string }): StackIn
 	// Derive plugin from stack (if possible)
 	if (!stackInfo.plugin) {
 		stackInfo.plugin =
-			/withastro\/astro\/packages\/integrations\/([\w-]+)/gim.exec(stackText)?.at(1) ||
-			/(@astrojs\/[\w-]+)\/(server|client|index)/gim.exec(stackText)?.at(1) ||
+			/withastro\/astro\/packages\/integrations\/([\w-]+)/i.exec(stackText)?.at(1) ||
+			/(@astrojs\/[\w-]+)\/(server|client|index)/i.exec(stackText)?.at(1) ||
 			undefined;
 	}
 
@@ -208,7 +210,7 @@ function collectInfoFromStacktrace(error: SSRError & { stack: string }): StackIn
 
 function cleanErrorStack(stack: string) {
 	return stack
-		.split(/\n/g)
+		.split(/\n/)
 		.map((l) => l.replace(/\/@fs\//g, '/'))
 		.join('\n');
 }
@@ -233,10 +235,10 @@ export function getDocsForError(err: ErrorWithMetadata): string | undefined {
  * Render a subset of Markdown to HTML or a CLI output
  */
 export function renderErrorMarkdown(markdown: string, target: 'html' | 'cli') {
-	const linkRegex = /\[([^\[]+)\]\((.*)\)/gm;
-	const boldRegex = /\*\*(.+)\*\*/gm;
-	const urlRegex = / (\b(https?|ftp):\/\/[-A-Z0-9+&@#\\/%?=~_|!:,.;]*[-A-Z0-9+&@#\\/%=~_|])/gim;
-	const codeRegex = /`([^`]+)`/gim;
+	const linkRegex = /\[([^[]+)\]\((.*)\)/g;
+	const boldRegex = /\*\*(.+)\*\*/g;
+	const urlRegex = / ((?:https?|ftp):\/\/[-\w+&@#\\/%?=~|!:,.;]*[-\w+&@#\\/%=~|])/gi;
+	const codeRegex = /`([^`]+)`/g;
 
 	if (target === 'html') {
 		return escape(markdown)
diff --git a/packages/astro/src/core/errors/errors-data.ts b/packages/astro/src/core/errors/errors-data.ts
index 11bc3570d2..aaa71b02c4 100644
--- a/packages/astro/src/core/errors/errors-data.ts
+++ b/packages/astro/src/core/errors/errors-data.ts
@@ -587,7 +587,7 @@ export const PrerenderDynamicEndpointPathCollide = {
 	message: (pathname: string) =>
 		`Could not render \`${pathname}\` with an \`undefined\` param as the generated path will collide during prerendering. Prevent passing \`undefined\` as \`params\` for the endpoint's \`getStaticPaths()\` function, or add an additional extension to the endpoint's filename.`,
 	hint: (filename: string) =>
-		`Rename \`${filename}\` to \`${filename.replace(/\.(js|ts)/, (m) => `.json` + m)}\``,
+		`Rename \`${filename}\` to \`${filename.replace(/\.(?:js|ts)/, (m) => `.json` + m)}\``,
 } satisfies ErrorData;
 /**
  * @docs
diff --git a/packages/astro/src/core/logger/vite.ts b/packages/astro/src/core/logger/vite.ts
index 9604a68f05..ca803e0ff3 100644
--- a/packages/astro/src/core/logger/vite.ts
+++ b/packages/astro/src/core/logger/vite.ts
@@ -12,15 +12,15 @@ function isAstroSrcFile(id: string | null) {
 }
 
 // capture "page reload some/Component.vue (additional info)" messages
-const vitePageReloadMsg = /page reload (.*)( \(.*\))?/;
+const vitePageReloadMsg = /page reload (.*)/;
 // capture "hmr update some/Component.vue" messages
 const viteHmrUpdateMsg = /hmr update (.*)/;
 // capture "vite v5.0.0 building SSR bundle for production..." and "vite v5.0.0 building for production..." messages
 const viteBuildMsg = /vite.*building.*for production/;
 // capture "\n  Shortcuts" messages
-const viteShortcutTitleMsg = /^\s*Shortcuts\s*$/s;
+const viteShortcutTitleMsg = /^\s*Shortcuts\s*$/;
 // capture "press * + enter to ..." messages
-const viteShortcutHelpMsg = /press\s+(.*?)\s+to\s+(.*)$/s;
+const viteShortcutHelpMsg = /press (.+?) to (.+)$/s;
 
 export function createViteLogger(
 	astroLogger: AstroLogger,
@@ -39,8 +39,7 @@ export function createViteLogger(
 			// Rewrite HMR page reload message
 			if ((m = vitePageReloadMsg.exec(stripped))) {
 				if (isAstroSrcFile(m[1])) return;
-				const extra = m[2] ?? '';
-				astroLogger.info('watch', m[1] + extra);
+				astroLogger.info('watch', m[1]);
 			}
 			// Rewrite HMR update message
 			else if ((m = viteHmrUpdateMsg.exec(stripped))) {
diff --git a/packages/astro/src/core/messages.ts b/packages/astro/src/core/messages.ts
index 5b424944fe..f69b846974 100644
--- a/packages/astro/src/core/messages.ts
+++ b/packages/astro/src/core/messages.ts
@@ -225,7 +225,7 @@ export function formatConfigErrorMessage(err: ZodError) {
 
 // a regex to match the first line of a stack trace
 const STACK_LINE_REGEXP = /^\s+at /g;
-const IRRELEVANT_STACK_REGEXP = /(node_modules|astro[\/\\]dist)/g;
+const IRRELEVANT_STACK_REGEXP = /node_modules|astro[/\\]dist/g;
 function formatErrorStackTrace(
 	err: Error | ErrorWithMetadata,
 	showFullStacktrace: boolean
diff --git a/packages/astro/src/core/preview/vite-plugin-astro-preview.ts b/packages/astro/src/core/preview/vite-plugin-astro-preview.ts
index 9ec940c681..a425807dcc 100644
--- a/packages/astro/src/core/preview/vite-plugin-astro-preview.ts
+++ b/packages/astro/src/core/preview/vite-plugin-astro-preview.ts
@@ -7,7 +7,7 @@ import { notFoundTemplate, subpathNotUsedTemplate } from '../../template/4xx.js'
 import { cleanUrl } from '../../vite-plugin-utils/index.js';
 import { stripBase } from './util.js';
 
-const HAS_FILE_EXTENSION_REGEXP = /^.*\.[^\\]+$/;
+const HAS_FILE_EXTENSION_REGEXP = /\.[^/]+$/;
 
 export function vitePluginAstroPreview(settings: AstroSettings): Plugin {
 	const { base, outDir, trailingSlash } = settings.config;
diff --git a/packages/astro/src/core/routing/manifest/create.ts b/packages/astro/src/core/routing/manifest/create.ts
index 3818f08c76..6a1064c052 100644
--- a/packages/astro/src/core/routing/manifest/create.ts
+++ b/packages/astro/src/core/routing/manifest/create.ts
@@ -43,13 +43,15 @@ function countOccurrences(needle: string, haystack: string) {
 
 function getParts(part: string, file: string) {
 	const result: RoutePart[] = [];
+	// Disable eslint as we're not sure how to improve this regex yet
+	// eslint-disable-next-line regexp/no-super-linear-backtracking
 	part.split(/\[(.+?\(.+?\)|.+?)\]/).map((str, i) => {
 		if (!str) return;
 		const dynamic = i % 2 === 1;
 
 		const [, content] = dynamic ? /([^(]+)$/.exec(str) || [null, null] : [null, str];
 
-		if (!content || (dynamic && !/^(\.\.\.)?[a-zA-Z0-9_$]+$/.test(content))) {
+		if (!content || (dynamic && !/^(?:\.\.\.)?[\w$]+$/.test(content))) {
 			throw new Error(`Invalid route ${file} — parameter name must match /^[a-zA-Z0-9_$]+$/`);
 		}
 
diff --git a/packages/astro/src/events/error.ts b/packages/astro/src/events/error.ts
index b3326091de..8b8e9767e6 100644
--- a/packages/astro/src/events/error.ts
+++ b/packages/astro/src/events/error.ts
@@ -26,7 +26,7 @@ interface ConfigErrorEventPayload extends ErrorEventPayload {
  * This is only used for errors that do not come from us so we can get a basic
  * and anonymous idea of what the error is about.
  */
-const ANONYMIZE_MESSAGE_REGEX = /^(\w| )+/;
+const ANONYMIZE_MESSAGE_REGEX = /^(?:\w| )+/;
 function anonymizeErrorMessage(msg: string): string | undefined {
 	const matchedMessage = msg.match(ANONYMIZE_MESSAGE_REGEX);
 	if (!matchedMessage?.[0]) {
@@ -100,7 +100,7 @@ function getSafeErrorMessage(message: string | Function): string {
 			.trim()
 			.slice(1, -1)
 			.replace(
-				/\${([^}]+)}/gm,
+				/\$\{([^}]+)\}/g,
 				(str, match1) =>
 					`${match1
 						.split(/\.?(?=[A-Z])/)
diff --git a/packages/astro/src/i18n/middleware.ts b/packages/astro/src/i18n/middleware.ts
index 9fabff13af..5e9f17a6a8 100644
--- a/packages/astro/src/i18n/middleware.ts
+++ b/packages/astro/src/i18n/middleware.ts
@@ -32,13 +32,6 @@ function pathnameHasLocale(pathname: string, locales: Locales): boolean {
 	return false;
 }
 
-type MiddlewareOptions = {
-	i18n: SSRManifest['i18n'];
-	base: SSRManifest['base'];
-	trailingSlash: SSRManifest['trailingSlash'];
-	buildFormat: SSRManifest['buildFormat'];
-};
-
 export function createI18nMiddleware(
 	i18n: SSRManifest['i18n'],
 	base: SSRManifest['base'],
diff --git a/packages/astro/src/runtime/client/dev-toolbar/apps/audit/a11y.ts b/packages/astro/src/runtime/client/dev-toolbar/apps/audit/a11y.ts
index ac1624cd9f..2b49439084 100644
--- a/packages/astro/src/runtime/client/dev-toolbar/apps/audit/a11y.ts
+++ b/packages/astro/src/runtime/client/dev-toolbar/apps/audit/a11y.ts
@@ -240,7 +240,7 @@ export const a11y: AuditRuleWithSelector[] = [
 		message:
 			'Screen readers already announce `img` elements as an image. There is no need to use words such as "image", "photo", and/or "picture".',
 		selector: 'img[alt]:not([aria-hidden])',
-		match: (img: HTMLImageElement) => /\b(image|picture|photo)\b/i.test(img.alt),
+		match: (img: HTMLImageElement) => /\b(?:image|picture|photo)\b/i.test(img.alt),
 	},
 	{
 		code: 'a11y-incorrect-aria-attribute-type',
diff --git a/packages/astro/src/runtime/server/render/component.ts b/packages/astro/src/runtime/server/render/component.ts
index 3fcb6f2aa3..6d21175459 100644
--- a/packages/astro/src/runtime/server/render/component.ts
+++ b/packages/astro/src/runtime/server/render/component.ts
@@ -65,8 +65,8 @@ function isHTMLComponent(Component: unknown) {
 	return Component && (Component as any)['astro:html'] === true;
 }
 
-const ASTRO_SLOT_EXP = /\<\/?astro-slot\b[^>]*>/g;
-const ASTRO_STATIC_SLOT_EXP = /\<\/?astro-static-slot\b[^>]*>/g;
+const ASTRO_SLOT_EXP = /<\/?astro-slot\b[^>]*>/g;
+const ASTRO_STATIC_SLOT_EXP = /<\/?astro-static-slot\b[^>]*>/g;
 function removeStaticAstroSlot(html: string, supportsAstroStaticSlot: boolean) {
 	const exp = supportsAstroStaticSlot ? ASTRO_STATIC_SLOT_EXP : ASTRO_SLOT_EXP;
 	return html.replace(exp, '');
@@ -390,7 +390,7 @@ If you're still stuck, please open an issue on GitHub or join us at https://astr
 }
 
 function sanitizeElementName(tag: string) {
-	const unsafe = /[&<>'"\s]+/g;
+	const unsafe = /[&<>'"\s]+/;
 	if (!unsafe.test(tag)) return tag;
 	return tag.trim().split(unsafe)[0].trim();
 }
diff --git a/packages/astro/src/runtime/server/render/util.ts b/packages/astro/src/runtime/server/render/util.ts
index 0e3f413833..91883024e9 100644
--- a/packages/astro/src/runtime/server/render/util.ts
+++ b/packages/astro/src/runtime/server/render/util.ts
@@ -7,17 +7,17 @@ import { HTMLString, markHTMLString } from '../escape.js';
 export const voidElementNames =
 	/^(area|base|br|col|command|embed|hr|img|input|keygen|link|meta|param|source|track|wbr)$/i;
 const htmlBooleanAttributes =
-	/^(allowfullscreen|async|autofocus|autoplay|controls|default|defer|disabled|disablepictureinpicture|disableremoteplayback|formnovalidate|hidden|loop|nomodule|novalidate|open|playsinline|readonly|required|reversed|scoped|seamless|itemscope)$/i;
-const htmlEnumAttributes = /^(contenteditable|draggable|spellcheck|value)$/i;
+	/^(?:allowfullscreen|async|autofocus|autoplay|controls|default|defer|disabled|disablepictureinpicture|disableremoteplayback|formnovalidate|hidden|loop|nomodule|novalidate|open|playsinline|readonly|required|reversed|scoped|seamless|itemscope)$/i;
+const htmlEnumAttributes = /^(?:contenteditable|draggable|spellcheck|value)$/i;
 // Note: SVG is case-sensitive!
-const svgEnumAttributes = /^(autoReverse|externalResourcesRequired|focusable|preserveAlpha)$/i;
+const svgEnumAttributes = /^(?:autoReverse|externalResourcesRequired|focusable|preserveAlpha)$/i;
 
 const STATIC_DIRECTIVES = new Set(['set:html', 'set:text']);
 
 // converts (most) arbitrary strings to valid JS identifiers
 const toIdent = (k: string) =>
-	k.trim().replace(/(?:(?!^)\b\w|\s+|[^\w]+)/g, (match, index) => {
-		if (/[^\w]|\s/.test(match)) return '';
+	k.trim().replace(/(?!^)\b\w|\s+|\W+/g, (match, index) => {
+		if (/\W/.test(match)) return '';
 		return index === 0 ? match : match.toUpperCase();
 	});
 
diff --git a/packages/astro/src/virtual-modules/content.ts b/packages/astro/src/virtual-modules/content.ts
index a3e9a68289..8424f3b06c 100644
--- a/packages/astro/src/virtual-modules/content.ts
+++ b/packages/astro/src/virtual-modules/content.ts
@@ -66,6 +66,7 @@ export const reference = noop;
 /** Run `astro sync` to generate high fidelity types */
 export type CollectionKey = any;
 /** Run `astro sync` to generate high fidelity types */
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
 export type CollectionEntry<C> = any;
 /** Run `astro sync` to generate high fidelity types */
 export type ContentCollectionKey = any;
diff --git a/packages/astro/src/vite-plugin-astro-server/route.ts b/packages/astro/src/vite-plugin-astro-server/route.ts
index f04e236418..0cc8a81932 100644
--- a/packages/astro/src/vite-plugin-astro-server/route.ts
+++ b/packages/astro/src/vite-plugin-astro-server/route.ts
@@ -108,7 +108,7 @@ export async function matchRoute(
 	// Try without `.html` extensions or `index.html` in request URLs to mimic
 	// routing behavior in production builds. This supports both file and directory
 	// build formats, and is necessary based on how the manifest tracks build targets.
-	const altPathname = pathname.replace(/(index)?\.html$/, '');
+	const altPathname = pathname.replace(/(?:index)?\.html$/, '');
 	if (altPathname !== pathname) {
 		return await matchRoute(altPathname, manifestData, pipeline);
 	}
@@ -229,6 +229,8 @@ export async function handleRoute({
 					return '';
 				},
 				params: [],
+				// Disable eslint as we only want to generate an empty RegExp
+				// eslint-disable-next-line prefer-regex-literals
 				pattern: new RegExp(''),
 				prerender: false,
 				segments: [],
diff --git a/packages/astro/src/vite-plugin-astro/compile.ts b/packages/astro/src/vite-plugin-astro/compile.ts
index 15fc9ba73b..3a1d4c6f64 100644
--- a/packages/astro/src/vite-plugin-astro/compile.ts
+++ b/packages/astro/src/vite-plugin-astro/compile.ts
@@ -4,6 +4,7 @@ import { compile, type CompileProps, type CompileResult } from '../core/compile/
 import type { Logger } from '../core/logger/core.js';
 import { getFileInfo } from '../vite-plugin-utils/index.js';
 import type { CompileMetadata } from './types.js';
+import { frontmatterRE } from './utils.js';
 
 interface CompileAstroOption {
 	compileProps: CompileProps;
@@ -23,8 +24,6 @@ interface EnhanceCompilerErrorOptions {
 	logger: Logger;
 }
 
-const FRONTMATTER_PARSE_REGEXP = /^\-\-\-(.*)^\-\-\-/ms;
-
 export async function compileAstro({
 	compileProps,
 	astroFileToCompileMetadata,
@@ -107,7 +106,7 @@ async function enhanceCompileError({
 	// Before throwing, it is better to verify the frontmatter here, and
 	// let esbuild throw a more specific exception if the code is invalid.
 	// If frontmatter is valid or cannot be parsed, then continue.
-	const scannedFrontmatter = FRONTMATTER_PARSE_REGEXP.exec(source);
+	const scannedFrontmatter = frontmatterRE.exec(source);
 	if (scannedFrontmatter) {
 		// Top-level return is not supported, so replace `return` with throw
 		const frontmatter = scannedFrontmatter[1].replace(/\breturn\b/g, 'throw');
diff --git a/packages/astro/src/vite-plugin-astro/hmr.ts b/packages/astro/src/vite-plugin-astro/hmr.ts
index 949fc1d6cb..28527f90e4 100644
--- a/packages/astro/src/vite-plugin-astro/hmr.ts
+++ b/packages/astro/src/vite-plugin-astro/hmr.ts
@@ -4,6 +4,7 @@ import type { HmrContext } from 'vite';
 import type { Logger } from '../core/logger/core.js';
 import type { CompileAstroResult } from './compile.js';
 import type { CompileMetadata } from './types.js';
+import { frontmatterRE } from './utils.js';
 
 export interface HandleHotUpdateOptions {
 	logger: Logger;
@@ -58,8 +59,10 @@ export async function handleHotUpdate(
 	}
 }
 
-const frontmatterRE = /^\-\-\-.*?^\-\-\-/ms;
+// Disable eslint as we're not sure how to improve this regex yet
+// eslint-disable-next-line regexp/no-super-linear-backtracking
 const scriptRE = /<script(?:\s.*?)?>.*?<\/script>/gs;
+// eslint-disable-next-line regexp/no-super-linear-backtracking
 const styleRE = /<style(?:\s.*?)?>.*?<\/style>/gs;
 
 function isStyleOnlyChanged(oldCode: string, newCode: string) {
diff --git a/packages/astro/src/vite-plugin-astro/utils.ts b/packages/astro/src/vite-plugin-astro/utils.ts
new file mode 100644
index 0000000000..8bb5b617a3
--- /dev/null
+++ b/packages/astro/src/vite-plugin-astro/utils.ts
@@ -0,0 +1 @@
+export const frontmatterRE = /^---(.*?)^---/ms;
diff --git a/packages/astro/src/vite-plugin-env/index.ts b/packages/astro/src/vite-plugin-env/index.ts
index 2e16cc5bf3..6621d21795 100644
--- a/packages/astro/src/vite-plugin-env/index.ts
+++ b/packages/astro/src/vite-plugin-env/index.ts
@@ -13,7 +13,7 @@ interface EnvPluginOptions {
 const importMetaEnvOnlyRe = /\bimport\.meta\.env\b(?!\.)/;
 // Match valid JS variable names (identifiers), which accepts most alphanumeric characters,
 // except that the first character cannot be a number.
-const isValidIdentifierRe = /^[_$a-zA-Z][_$a-zA-Z0-9]*$/;
+const isValidIdentifierRe = /^[_$a-zA-Z][\w$]*$/;
 // Match `export const prerender = import.meta.env.*` since `vite=plugin-scanner` requires
 // the `import.meta.env.*` to always be replaced.
 const exportConstPrerenderRe = /\bexport\s+const\s+prerender\s*=\s*import\.meta\.env\.(.+?)\b/;
diff --git a/packages/astro/src/vite-plugin-head/index.ts b/packages/astro/src/vite-plugin-head/index.ts
index 228e4e437f..0350e9d777 100644
--- a/packages/astro/src/vite-plugin-head/index.ts
+++ b/packages/astro/src/vite-plugin-head/index.ts
@@ -9,7 +9,7 @@ import type { BuildInternals } from '../core/build/internal.js';
 import { getAstroMetadata } from '../vite-plugin-astro/index.js';
 
 // Detect this in comments, both in .astro components and in js/ts files.
-const injectExp = /(^\/\/|\/\/!)\s*astro-head-inject/;
+const injectExp = /(?:^\/\/|\/\/!)\s*astro-head-inject/;
 
 export default function configHeadVitePlugin(): vite.Plugin {
 	let server: vite.ViteDevServer;
diff --git a/packages/astro/src/vite-plugin-html/transform/utils.ts b/packages/astro/src/vite-plugin-html/transform/utils.ts
index 88cb226e5d..dd0ebcd14d 100644
--- a/packages/astro/src/vite-plugin-html/transform/utils.ts
+++ b/packages/astro/src/vite-plugin-html/transform/utils.ts
@@ -1,7 +1,7 @@
 import type { Element } from 'hast';
 import type MagicString from 'magic-string';
 
-const splitAttrsTokenizer = /([\$\{\}\@a-z0-9_\:\-]*)\s*?=\s*?(['"]?)(.*?)\2\s+/gim;
+const splitAttrsTokenizer = /([${}@\w:\-]*)\s*=\s*?(['"]?)(.*?)\2\s+/g;
 
 export function replaceAttribute(s: MagicString, node: Element, key: string, newValue: string) {
 	splitAttrsTokenizer.lastIndex = 0;
@@ -12,7 +12,7 @@ export function replaceAttribute(s: MagicString, node: Element, key: string, new
 	if (offset === -1) return;
 	const start = node.position!.start.offset! + offset;
 	const tokens = text.slice(offset).split(splitAttrsTokenizer);
-	const token = tokens[0].replace(/([^>])(\>[\s\S]*$)/gim, '$1');
+	const token = tokens[0].replace(/([^>])>[\s\S]*$/gm, '$1');
 	if (token.trim() === key) {
 		const end = start + key.length;
 		return s.overwrite(start, end, newValue, { contentOnly: true });
diff --git a/packages/astro/src/vite-plugin-scanner/scan.ts b/packages/astro/src/vite-plugin-scanner/scan.ts
index 6c277567d4..4e0e5fbfe0 100644
--- a/packages/astro/src/vite-plugin-scanner/scan.ts
+++ b/packages/astro/src/vite-plugin-scanner/scan.ts
@@ -65,7 +65,7 @@ export async function scan(
 				.trim();
 			// For a given export, check the value of the first non-whitespace token.
 			// Basically extract the `true` from the statement `export const prerender = true`
-			const suffix = code.slice(endOfLocalName).trim().replace(/\=/, '').trim().split(/[;\n]/)[0];
+			const suffix = code.slice(endOfLocalName).trim().replace(/=/, '').trim().split(/[;\n]/)[0];
 			if (prefix !== 'const' || !(isTruthy(suffix) || isFalsy(suffix))) {
 				throw new AstroError({
 					...AstroErrorData.InvalidPrerenderExport,
diff --git a/packages/astro/src/vite-plugin-utils/index.ts b/packages/astro/src/vite-plugin-utils/index.ts
index 6f672d7d99..21ade5b0a4 100644
--- a/packages/astro/src/vite-plugin-utils/index.ts
+++ b/packages/astro/src/vite-plugin-utils/index.ts
@@ -17,7 +17,7 @@ export function getFileInfo(id: string, config: AstroConfig) {
 	let fileUrl = fileId.includes('/pages/')
 		? fileId
 				.replace(/^.*?\/pages\//, sitePathname)
-				.replace(/(\/index)?\.(md|markdown|mdown|mkdn|mkd|mdwn|md|astro)$/, '')
+				.replace(/(?:\/index)?\.(?:md|markdown|mdown|mkdn|mkd|mdwn|astro)$/, '')
 		: undefined;
 	if (fileUrl && config.trailingSlash === 'always') {
 		fileUrl = appendForwardSlash(fileUrl);
diff --git a/packages/astro/test/0-css.test.js b/packages/astro/test/0-css.test.js
index 3a4b9241dc..c8c5af6d8f 100644
--- a/packages/astro/test/0-css.test.js
+++ b/packages/astro/test/0-css.test.js
@@ -42,7 +42,7 @@ describe('CSS', function () {
 				const classes = $('#class');
 				let scopedAttribute;
 				for (const [key] of Object.entries(classes[0].attribs)) {
-					if (/^data-astro-cid-[A-Za-z0-9-]+/.test(key)) {
+					if (/^data-astro-cid-[A-Za-z\d-]+/.test(key)) {
 						// Ema: this is ugly, but for reasons that I don't want to explore, cheerio
 						// lower case the hash of the attribute
 						scopedAttribute = key;
@@ -72,7 +72,7 @@ describe('CSS', function () {
 
 			it('Child inheritance', (done) => {
 				for (const [key] of Object.entries($('#passed-in')[0].attribs)) {
-					if (/^data-astro-cid-[A-Za-z0-9-]+/.test(key)) {
+					if (/^data-astro-cid-[A-Za-z\d-]+/.test(key)) {
 						done();
 					}
 				}
@@ -84,25 +84,25 @@ describe('CSS', function () {
 			});
 
 			it('<style lang="sass">', async () => {
-				expect(bundledCSS).to.match(new RegExp('h1\\[data-astro-cid-[^{]*{color:#90ee90}'));
+				expect(bundledCSS).to.match(/h1\[data-astro-cid-[^{]*\{color:#90ee90\}/);
 			});
 
 			it('<style lang="scss">', async () => {
-				expect(bundledCSS).to.match(new RegExp('h1\\[data-astro-cid-[^{]*{color:#ff69b4}'));
+				expect(bundledCSS).to.match(/h1\[data-astro-cid-[^{]*\{color:#ff69b4\}/);
 			});
 		});
 
 		describe('Styles in src/', () => {
 			it('.css', async () => {
-				expect(bundledCSS).to.match(new RegExp('.linked-css[^{]*{color:gold'));
+				expect(bundledCSS).to.match(/.linked-css[^{]*\{color:gold/);
 			});
 
 			it('.sass', async () => {
-				expect(bundledCSS).to.match(new RegExp('.linked-sass[^{]*{color:#789'));
+				expect(bundledCSS).to.match(/.linked-sass[^{]*\{color:#789/);
 			});
 
 			it('.scss', async () => {
-				expect(bundledCSS).to.match(new RegExp('.linked-scss[^{]*{color:#6b8e23'));
+				expect(bundledCSS).to.match(/.linked-scss[^{]*\{color:#6b8e23/);
 			});
 		});
 
@@ -118,7 +118,7 @@ describe('CSS', function () {
 			it('.module.css', async () => {
 				const el = $('#react-module-css');
 				const classes = el.attr('class').split(' ');
-				const moduleClass = classes.find((name) => /^_title_[A-Za-z0-9-_]+/.test(name));
+				const moduleClass = classes.find((name) => /^_title_[\w-]+/.test(name));
 
 				// 1. check HTML
 				expect(el.attr('class')).to.include(moduleClass);
@@ -134,7 +134,7 @@ describe('CSS', function () {
 				expect(el.attr('class')).to.include('react-sass-title');
 
 				// 2. check CSS
-				expect(bundledCSS).to.match(new RegExp(`.react-sass-title[^{]*{font-family:fantasy`));
+				expect(bundledCSS).to.match(/.react-sass-title[^{]*\{font-family:fantasy/);
 			});
 
 			it('.scss', async () => {
@@ -144,13 +144,13 @@ describe('CSS', function () {
 				expect(el.attr('class')).to.include('react-scss-title');
 
 				// 2. check CSS
-				expect(bundledCSS).to.match(new RegExp(`.react-scss-title[^{]*{font-family:fantasy`));
+				expect(bundledCSS).to.match(/.react-scss-title[^{]*\{font-family:fantasy/);
 			});
 
 			it('.module.sass', async () => {
 				const el = $('#react-module-sass');
 				const classes = el.attr('class').split(' ');
-				const moduleClass = classes.find((name) => /^_title_[A-Za-z0-9-_]+/.test(name));
+				const moduleClass = classes.find((name) => /^_title_[\w-]+/.test(name));
 
 				// 1. check HTML
 				expect(el.attr('class')).to.include(moduleClass);
@@ -162,7 +162,7 @@ describe('CSS', function () {
 			it('.module.scss', async () => {
 				const el = $('#react-module-scss');
 				const classes = el.attr('class').split(' ');
-				const moduleClass = classes.find((name) => /^_title_[A-Za-z0-9-_]+/.test(name));
+				const moduleClass = classes.find((name) => /^_title_[\w-]+/.test(name));
 
 				// 1. check HTML
 				expect(el.attr('class')).to.include(moduleClass);
@@ -189,7 +189,7 @@ describe('CSS', function () {
 				expect(el.attr('class')).to.include('vue-css');
 
 				// 2. check CSS
-				expect(bundledCSS).to.match(new RegExp(`.vue-css[^{]*{font-family:cursive`));
+				expect(bundledCSS).to.match(/.vue-css[^{]*\{font-family:cursive/);
 			});
 
 			it('<style scoped>', async () => {
@@ -210,7 +210,7 @@ describe('CSS', function () {
 			it('<style module>', async () => {
 				const el = $('#vue-modules');
 				const classes = el.attr('class').split(' ');
-				const moduleClass = classes.find((name) => /^_title_[A-Za-z0-9-_]+/.test(name));
+				const moduleClass = classes.find((name) => /^_title_[\w-]+/.test(name));
 
 				// 1. check HTML
 				expect(el.attr('class')).to.include(moduleClass);
@@ -226,7 +226,7 @@ describe('CSS', function () {
 				expect(el.attr('class')).to.include('vue-sass');
 
 				// 2. check CSS
-				expect(bundledCSS).to.match(new RegExp(`.vue-sass[^{]*{font-family:cursive`));
+				expect(bundledCSS).to.match(/.vue-sass[^{]*\{font-family:cursive/);
 			});
 
 			it('<style lang="scss">', async () => {
@@ -236,7 +236,7 @@ describe('CSS', function () {
 				expect(el.attr('class')).to.include('vue-scss');
 
 				// 2. check CSS
-				expect(bundledCSS).to.match(new RegExp(`.vue-scss[^{]*{font-family:cursive`));
+				expect(bundledCSS).to.match(/.vue-scss[^{]*\{font-family:cursive/);
 			});
 		});
 
@@ -245,7 +245,7 @@ describe('CSS', function () {
 				const el = $('#svelte-css');
 				const classes = el.attr('class').split(' ');
 				const scopedClass = classes.find(
-					(name) => name !== 'svelte-css' && /^svelte-[A-Za-z0-9-]+/.test(name)
+					(name) => name !== 'svelte-css' && /^svelte-[A-Za-z\d-]+/.test(name)
 				);
 
 				// 1. check HTML
@@ -261,7 +261,7 @@ describe('CSS', function () {
 				const el = $('#svelte-sass');
 				const classes = el.attr('class').split(' ');
 				const scopedClass = classes.find(
-					(name) => name !== 'svelte-sass' && /^svelte-[A-Za-z0-9-]+/.test(name)
+					(name) => name !== 'svelte-sass' && /^svelte-[A-Za-z\d-]+/.test(name)
 				);
 
 				// 1. check HTML
@@ -277,7 +277,7 @@ describe('CSS', function () {
 				const el = $('#svelte-scss');
 				const classes = el.attr('class').split(' ');
 				const scopedClass = classes.find(
-					(name) => name !== 'svelte-scss' && /^svelte-[A-Za-z0-9-]+/.test(name)
+					(name) => name !== 'svelte-scss' && /^svelte-[A-Za-z\d-]+/.test(name)
 				);
 
 				// 1. check HTML
diff --git a/packages/astro/test/astro-css-bundling.test.js b/packages/astro/test/astro-css-bundling.test.js
index ae66ea838f..9143a782b5 100644
--- a/packages/astro/test/astro-css-bundling.test.js
+++ b/packages/astro/test/astro-css-bundling.test.js
@@ -102,7 +102,7 @@ describe('CSS Bundling', function () {
 
 		it('CSS does not include hashes', async () => {
 			const [firstFound] = await fixture.readdir('/assets');
-			expect(firstFound).to.not.match(/[a-z]+\.[0-9a-z]{8}\.css/);
+			expect(firstFound).to.not.match(/[a-z]+\.[\da-z]{8}\.css/);
 		});
 
 		it('there are 2 index named CSS files', async () => {
diff --git a/packages/astro/test/astro-doctype.test.js b/packages/astro/test/astro-doctype.test.js
index 65c0a5543b..8c954141e6 100644
--- a/packages/astro/test/astro-doctype.test.js
+++ b/packages/astro/test/astro-doctype.test.js
@@ -29,10 +29,7 @@ describe('Doctype', () => {
 
 		// test that Doctype included was preserved
 		expect(html).to.match(
-			new RegExp(
-				'^<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">',
-				'i'
-			)
+			/^<!DOCTYPE html PUBLIC "-\/\/W3C\/\/DTD HTML 4.01 Transitional\/\/EN" "http:\/\/www.w3.org\/TR\/html4\/loose.dtd">/i
 		);
 	});
 
diff --git a/packages/astro/test/astro-partial-html.test.js b/packages/astro/test/astro-partial-html.test.js
index 162c6985d1..83dccaf804 100644
--- a/packages/astro/test/astro-partial-html.test.js
+++ b/packages/astro/test/astro-partial-html.test.js
@@ -26,7 +26,7 @@ describe('Partial HTML', async () => {
 
 		// test 2: correct CSS present
 		const allInjectedStyles = $('style').text();
-		expect(allInjectedStyles).to.match(/\[data-astro-cid-[^{]+{color:red}/);
+		expect(allInjectedStyles).to.match(/\[data-astro-cid-[^{]+\{color:red\}/);
 	});
 
 	it('injects framework styles', async () => {
@@ -38,7 +38,7 @@ describe('Partial HTML', async () => {
 
 		// test 2: link tag present
 		const allInjectedStyles = $('style').text().replace(/\s*/g, '');
-		expect(allInjectedStyles).to.match(/h1{color:red;}/);
+		expect(allInjectedStyles).to.match(/h1\{color:red;\}/);
 	});
 
 	it('pages with a head, injection happens inside', async () => {
diff --git a/packages/astro/test/component-library.test.js b/packages/astro/test/component-library.test.js
index c11f9eed66..a135c40cb5 100644
--- a/packages/astro/test/component-library.test.js
+++ b/packages/astro/test/component-library.test.js
@@ -58,7 +58,7 @@ describe('Component Libraries', () => {
 
 			expect($('button').text()).to.equal('Click me', "Rendered the component's slot");
 
-			const findEvidence = createFindEvidence(/border-radius:( )*1rem/);
+			const findEvidence = createFindEvidence(/border-radius:\s*1rem/);
 			expect(await findEvidence('with-astro/index.html')).to.equal(
 				true,
 				"Included the .astro component's <style>"
@@ -136,7 +136,7 @@ describe('Component Libraries', () => {
 
 			expect($('button').text()).to.equal('Click me', "Rendered the component's slot");
 
-			const findEvidence = createFindEvidence(/border-radius:( )*1rem/);
+			const findEvidence = createFindEvidence(/border-radius:\s*1rem/);
 			expect(await findEvidence('/with-astro/')).to.equal(
 				true,
 				"Included the .astro component's <style>"
diff --git a/packages/astro/test/config-vite-css-target.test.js b/packages/astro/test/config-vite-css-target.test.js
index 94fa74e746..52e6d4c7f2 100644
--- a/packages/astro/test/config-vite-css-target.test.js
+++ b/packages/astro/test/config-vite-css-target.test.js
@@ -36,7 +36,7 @@ describe('CSS', function () {
 
 		it('vite.build.cssTarget is respected', async () => {
 			expect(bundledCSS).to.match(
-				new RegExp('.class\\[data-astro-[^{]*{top:0;right:0;bottom:0;left:0}')
+				/\.class\[data-astro-[^{]*\{top:0;right:0;bottom:0;left:0\}/
 			);
 		});
 	});
diff --git a/packages/astro/test/config-vite.test.js b/packages/astro/test/config-vite.test.js
index b15729dd79..1b4eaf11c4 100644
--- a/packages/astro/test/config-vite.test.js
+++ b/packages/astro/test/config-vite.test.js
@@ -17,6 +17,6 @@ describe('Vite Config', async () => {
 	it('Allows overriding bundle naming options in the build', async () => {
 		const html = await fixture.readFile('/index.html');
 		const $ = cheerio.load(html);
-		expect($('link').attr('href')).to.match(/\/assets\/testing-[a-z0-9]+\.css/);
+		expect($('link').attr('href')).to.match(/\/assets\/testing-[a-z\d]+\.css/);
 	});
 });
diff --git a/packages/astro/test/core-image.test.js b/packages/astro/test/core-image.test.js
index 447079fa2d..1b5618349f 100644
--- a/packages/astro/test/core-image.test.js
+++ b/packages/astro/test/core-image.test.js
@@ -955,7 +955,7 @@ describe('astro:image', () => {
 			let $script = $('script');
 
 			// Find image
-			const regex = /src:"([^"]*)/gm;
+			const regex = /src:"([^"]*)/;
 			const imageSrc = regex.exec($script.html())[1];
 			const data = await fixture.readFile(imageSrc, null);
 			expect(data).to.be.an.instanceOf(Buffer);
@@ -967,7 +967,7 @@ describe('astro:image', () => {
 			const srcset = $('#local-2-widths-with-spaces img').attr('srcset');
 
 			// Find image
-			const regex = /^(.+?) [0-9]+[wx]$/gm;
+			const regex = /^(.+?) \d+[wx]$/m;
 			const imageSrcset = regex.exec(srcset)[1];
 			expect(imageSrcset).to.not.contain(' ');
 		});
diff --git a/packages/astro/test/css-dangling-references.test.js b/packages/astro/test/css-dangling-references.test.js
index c38aa854d1..9aa9b2828e 100644
--- a/packages/astro/test/css-dangling-references.test.js
+++ b/packages/astro/test/css-dangling-references.test.js
@@ -1,7 +1,7 @@
 import { expect } from 'chai';
 import { loadFixture } from './test-utils.js';
 
-const cssAssetReferenceRegExp = /_astro\/[A-Za-z0-9\-]+\.[a0-9a-f]{8}\.css/g;
+const cssAssetReferenceRegExp = /_astro\/[A-Za-z\d\-]+\.[\da-f]{8}\.css/g;
 
 describe("When Vite's preloadModule polyfill is used", async () => {
 	let fixture;
diff --git a/packages/astro/test/hoisted-imports.test.js b/packages/astro/test/hoisted-imports.test.js
index c5ce98e050..9fc76cac1e 100644
--- a/packages/astro/test/hoisted-imports.test.js
+++ b/packages/astro/test/hoisted-imports.test.js
@@ -19,7 +19,7 @@ describe('Hoisted Imports', () => {
 		const $ = cheerio.load(html);
 		const scriptText = [];
 
-		const importRegex = /import\s*?['"]([^'"]+?)['"]/g;
+		const importRegex = /import\s*['"]([^'"]+)['"]/g;
 		async function resolveImports(text) {
 			const matches = text.matchAll(importRegex);
 			for (const match of matches) {
diff --git a/packages/astro/test/markdown.test.js b/packages/astro/test/markdown.test.js
index 471205844e..1df89715b0 100644
--- a/packages/astro/test/markdown.test.js
+++ b/packages/astro/test/markdown.test.js
@@ -70,7 +70,7 @@ describe('Markdown tests', () => {
 
 		it('Does not unescape entities', async () => {
 			const html = await fixture.readFile('/entities/index.html');
-			expect(html).to.match(new RegExp('&#x3C;i>This should NOT be italic&#x3C;/i>'));
+			expect(html).to.match(/&#x3C;i>This should NOT be italic&#x3C;\/i>/);
 		});
 	});
 });
diff --git a/packages/astro/test/minification-html.test.js b/packages/astro/test/minification-html.test.js
index cd3e70a1df..eec388321e 100644
--- a/packages/astro/test/minification-html.test.js
+++ b/packages/astro/test/minification-html.test.js
@@ -2,7 +2,7 @@ import { expect } from 'chai';
 import { loadFixture } from './test-utils.js';
 import testAdapter from './test-adapter.js';
 
-const NEW_LINES = /[\r\n]+/gm;
+const NEW_LINES = /[\r\n]+/g;
 
 /**
  * The doctype declaration is on a line between the rest of the HTML in SSG.
diff --git a/packages/astro/test/postcss.test.js b/packages/astro/test/postcss.test.js
index 0fcc604099..2ef15c4e15 100644
--- a/packages/astro/test/postcss.test.js
+++ b/packages/astro/test/postcss.test.js
@@ -26,23 +26,23 @@ describe('PostCSS', function () {
 
 	/** All test cases check whether nested styles (i.e. &.nested {}) are correctly transformed */
 	it('works in Astro page styles', () => {
-		expect(bundledCSS).to.match(new RegExp(`\.astro-page(\.(\w|-)*)*\.nested`));
+		expect(bundledCSS).to.match(/\.astro-page\[data-astro-cid-.*?\]\.nested/);
 	});
 
 	it('works in Astro component styles', () => {
-		expect(bundledCSS).to.match(new RegExp(`\.astro-component(\.(\w|-)*)*\.nested`));
+		expect(bundledCSS).to.match(/\.astro-component\[data-astro-cid-.*?\]\.nested/);
 	});
 
 	it('works in JSX', () => {
-		expect(bundledCSS).to.match(new RegExp(`\.solid(\.(\w|-)*)*\.nested`));
+		expect(bundledCSS).to.match(/\.solid(\.(w|-)*)*\.nested/);
 	});
 
 	it('works in Vue', () => {
-		expect(bundledCSS).to.match(new RegExp(`\.vue(\.(\w|-)*)*\.nested`));
+		expect(bundledCSS).to.match(/\.vue(\.(w|-)*)*\.nested/);
 	});
 
 	it('works in Svelte', () => {
-		expect(bundledCSS).to.match(new RegExp(`\.svelte(\.(\w|-)*)*\.nested`));
+		expect(bundledCSS).to.match(/\.svelte(\.(w|-)*)*\.nested/);
 	});
 
 	it('ignores CSS in public/', async () => {
diff --git a/packages/astro/test/root-srcdir-css.test.js b/packages/astro/test/root-srcdir-css.test.js
index e033ff35b8..abb452db13 100644
--- a/packages/astro/test/root-srcdir-css.test.js
+++ b/packages/astro/test/root-srcdir-css.test.js
@@ -20,6 +20,6 @@ describe('srcDir', () => {
 
 		const relPath = $('link').attr('href');
 		const css = await fixture.readFile(relPath);
-		expect(css).to.match(/body{color:green}/);
+		expect(css).to.match(/body\{color:green\}/);
 	});
 });
diff --git a/packages/astro/test/ssr-api-route.test.js b/packages/astro/test/ssr-api-route.test.js
index e15993b886..d6ea4ac842 100644
--- a/packages/astro/test/ssr-api-route.test.js
+++ b/packages/astro/test/ssr-api-route.test.js
@@ -108,7 +108,7 @@ describe('API routes in SSR', () => {
 			});
 
 			let count = 0;
-			let exp = /set-cookie\:/g;
+			let exp = /set-cookie:/g;
 			while (exp.exec(response)) {
 				count++;
 			}
diff --git a/packages/astro/test/static-build.test.js b/packages/astro/test/static-build.test.js
index 5ec2251334..79aff0ef0f 100644
--- a/packages/astro/test/static-build.test.js
+++ b/packages/astro/test/static-build.test.js
@@ -128,7 +128,7 @@ describe('Static build', () => {
 	}
 
 	describe('Page CSS', () => {
-		const findEvidence = createFindEvidence(/height:( )*45vw/);
+		const findEvidence = createFindEvidence(/height:\s*45vw/);
 
 		it('Page level CSS is added', async () => {
 			const found = await findEvidence('/index.html');
@@ -186,7 +186,7 @@ describe('Static build', () => {
 		let found = false;
 		for (const log of logs) {
 			if (
-				/\`Astro\.request\.headers\` is not available in "static" output mode/.test(log.message)
+				/`Astro\.request\.headers` is not available in "static" output mode/.test(log.message)
 			) {
 				found = true;
 			}
diff --git a/packages/astro/test/tailwindcss.test.js b/packages/astro/test/tailwindcss.test.js
index 3c249cc2cb..dd41e5a630 100644
--- a/packages/astro/test/tailwindcss.test.js
+++ b/packages/astro/test/tailwindcss.test.js
@@ -28,20 +28,20 @@ describe('Tailwind', () => {
 		});
 
 		it('resolves CSS in src/styles', async () => {
-			expect(bundledCSS, 'includes used component classes').to.match(/\.bg-purple-600{/);
+			expect(bundledCSS, 'includes used component classes').to.match(/\.bg-purple-600\{/);
 
 			// tests a random tailwind class that isn't used on the page
-			expect(bundledCSS, 'purges unused classes').not.to.match(/\.bg-blue-600{/);
+			expect(bundledCSS, 'purges unused classes').not.to.match(/\.bg-blue-600\{/);
 
 			// tailwind escapes colons, `lg:py-3` compiles to `lg\:py-3`
-			expect(bundledCSS, 'includes responsive classes').to.match(/\.lg\\:py-3{/);
+			expect(bundledCSS, 'includes responsive classes').to.match(/\.lg\\:py-3\{/);
 
 			// tailwind escapes brackets, `font-[900]` compiles to `font-\[900\]`
-			expect(bundledCSS, 'supports arbitrary value classes').to.match(/\.font-\\\[900\\\]{/);
+			expect(bundledCSS, 'supports arbitrary value classes').to.match(/\.font-\\\[900\\\]\{/);
 
 			// custom theme colors were included
-			expect(bundledCSS, 'includes custom theme colors').to.match(/\.text-midnight{/);
-			expect(bundledCSS, 'includes custom theme colors').to.match(/\.bg-dawn{/);
+			expect(bundledCSS, 'includes custom theme colors').to.match(/\.text-midnight\{/);
+			expect(bundledCSS, 'includes custom theme colors').to.match(/\.bg-dawn\{/);
 		});
 
 		it('maintains classes in HTML', async () => {
@@ -64,7 +64,7 @@ describe('Tailwind', () => {
 			const $md = cheerio.load(html);
 			const bundledCSSHREF = $md('link[rel=stylesheet][href^=/_astro/]').attr('href');
 			const mdBundledCSS = await fixture.readFile(bundledCSSHREF.replace(/^\/?/, '/'));
-			expect(mdBundledCSS, 'includes used component classes').to.match(/\.bg-purple-600{/);
+			expect(mdBundledCSS, 'includes used component classes').to.match(/\.bg-purple-600\{/);
 		});
 	});
 });
diff --git a/packages/astro/test/test-utils.js b/packages/astro/test/test-utils.js
index 213c98711c..2d97969be8 100644
--- a/packages/astro/test/test-utils.js
+++ b/packages/astro/test/test-utils.js
@@ -302,7 +302,7 @@ export async function parseCliDevStart(proc) {
 	const messages = stdout
 		.split('\n')
 		.filter((ln) => !!ln.trim())
-		.map((ln) => ln.replace(/[🚀┃]/g, '').replace(/\s+/g, ' ').trim());
+		.map((ln) => ln.replace(/[🚀┃]/gu, '').replace(/\s+/g, ' ').trim());
 
 	return { messages };
 }
diff --git a/packages/astro/test/units/correct-path.js b/packages/astro/test/units/correct-path.js
index ff741414dd..026baeaf69 100644
--- a/packages/astro/test/units/correct-path.js
+++ b/packages/astro/test/units/correct-path.js
@@ -40,7 +40,7 @@ function normalizePath(str, stripTrailing) {
 	if (typeof str !== 'string') {
 		throw new TypeError('expected a string');
 	}
-	str = str.replace(/[\\\/]+/g, '/');
+	str = str.replace(/[\\/]+/g, '/');
 	if (stripTrailing !== false) {
 		str = removeTrailingSeparator(str);
 	}
diff --git a/packages/create-astro/src/actions/verify.ts b/packages/create-astro/src/actions/verify.ts
index ac3eae484e..a567e1d1f7 100644
--- a/packages/create-astro/src/actions/verify.ts
+++ b/packages/create-astro/src/actions/verify.ts
@@ -79,6 +79,8 @@ async function verifyTemplate(tmpl: string, ref?: string) {
 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
+// Disable eslint rule to not touch the original code
+// eslint-disable-next-line regexp/no-misleading-capturing-group
 const GIT_RE = /^(?<repo>[\w.-]+\/[\w.-]+)(?<subdir>[^#]+)?(?<ref>#[\w.-]+)?/;
 
 function parseGitURI(input: string) {
diff --git a/packages/integrations/markdoc/src/html/css/parse-inline-css-to-react.ts b/packages/integrations/markdoc/src/html/css/parse-inline-css-to-react.ts
index dd429788a6..2e445d35f5 100644
--- a/packages/integrations/markdoc/src/html/css/parse-inline-css-to-react.ts
+++ b/packages/integrations/markdoc/src/html/css/parse-inline-css-to-react.ts
@@ -17,7 +17,7 @@ export function parseInlineCSSToReactLikeObject(
 
 function convertCssDirectiveNameToReactCamelCase(original: string): string {
 	// capture group 1 is the character to capitalize, the hyphen is omitted by virtue of being outside the capture group
-	const replaced = original.replace(/-([a-z0-9])/gi, (_match, char) => {
+	const replaced = original.replace(/-([a-z\d])/gi, (_match, char) => {
 		return char.toUpperCase();
 	});
 	return replaced;
diff --git a/packages/integrations/markdoc/src/html/css/parse-inline-styles.ts b/packages/integrations/markdoc/src/html/css/parse-inline-styles.ts
index 623b560afc..fa3217c89c 100644
--- a/packages/integrations/markdoc/src/html/css/parse-inline-styles.ts
+++ b/packages/integrations/markdoc/src/html/css/parse-inline-styles.ts
@@ -23,9 +23,11 @@ const NEWLINE_REGEX = /\n/g;
 const WHITESPACE_REGEX = /^\s*/;
 
 // declaration
-const PROPERTY_REGEX = /^(\*?[-#/*\\\w]+(\[[0-9a-z_-]+\])?)\s*/;
+const PROPERTY_REGEX = /^([-#/*\\\w]+(\[[\da-z_-]+\])?)\s*/;
 const COLON_REGEX = /^:\s*/;
-const VALUE_REGEX = /^((?:'(?:\\'|.)*?'|"(?:\\"|.)*?"|\([^)]*?\)|[^};])+)/;
+// Disable eslint as we're not sure how to improve this regex yet
+// eslint-disable-next-line regexp/no-super-linear-backtracking
+const VALUE_REGEX = /^((?:'(?:\\'|.)*?'|"(?:\\"|.)*?"|\([^)]*\)|[^};])+)/;
 const SEMICOLON_REGEX = /^[;\s]*/;
 
 // https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String/Trim#Polyfill
diff --git a/packages/integrations/mdx/src/index.ts b/packages/integrations/mdx/src/index.ts
index 78c8ce889e..80d8c1b763 100644
--- a/packages/integrations/mdx/src/index.ts
+++ b/packages/integrations/mdx/src/index.ts
@@ -153,7 +153,7 @@ export default function mdx(partialMdxOptions: Partial<MdxOptions> = {}): AstroI
 										.filter(({ n }) => n === 'astro/jsx-runtime')
 										.map(({ ss, se }) => code.substring(ss, se));
 									const hasFragmentImport = importsFromJSXRuntime.some((statement) =>
-										/[\s,{](Fragment,|Fragment\s*})/.test(statement)
+										/[\s,{](?:Fragment,|Fragment\s*\})/.test(statement)
 									);
 									if (!hasFragmentImport) {
 										code = 'import { Fragment } from "astro/jsx-runtime"\n' + code;
diff --git a/packages/integrations/mdx/src/utils.ts b/packages/integrations/mdx/src/utils.ts
index a5b198116a..199929dc87 100644
--- a/packages/integrations/mdx/src/utils.ts
+++ b/packages/integrations/mdx/src/utils.ts
@@ -31,7 +31,7 @@ export function getFileInfo(id: string, config: AstroConfig): FileInfo {
 	let fileUrl: string;
 	const isPage = fileId.includes('/pages/');
 	if (isPage) {
-		fileUrl = fileId.replace(/^.*?\/pages\//, sitePathname).replace(/(\/index)?\.mdx$/, '');
+		fileUrl = fileId.replace(/^.*?\/pages\//, sitePathname).replace(/(?:\/index)?\.mdx$/, '');
 	} else if (url?.pathname.startsWith(config.root.pathname)) {
 		fileUrl = url.pathname.slice(config.root.pathname.length);
 	} else {
diff --git a/packages/integrations/partytown/src/sirv.ts b/packages/integrations/partytown/src/sirv.ts
index 7bba54b666..e6f7c62186 100644
--- a/packages/integrations/partytown/src/sirv.ts
+++ b/packages/integrations/partytown/src/sirv.ts
@@ -175,7 +175,9 @@ export default function (dir, opts = {}) {
 
 	let ignores = [];
 	if (opts.ignores !== false) {
-		ignores.push(/[/]([A-Za-z\s\d~$._-]+\.\w+){1,}$/); // any extn
+		// Disable eslint as we're not sure how to improve this regex yet
+		// eslint-disable-next-line regexp/no-super-linear-backtracking
+		ignores.push(/\/([\w\s~$.-]+\.\w+)+$/); // any extn
 		if (opts.dotfiles) ignores.push(/\/\.\w/);
 		else ignores.push(/\/\.well-known/);
 		[].concat(opts.ignores || []).forEach((x) => {
@@ -189,9 +191,9 @@ export default function (dir, opts = {}) {
 
 	if (!opts.dev) {
 		totalist(dir, (name, abs, stats) => {
-			if (/\.well-known[\\+\/]/.test(name)) {
+			if (/\.well-known[\\+/]/.test(name)) {
 			} // keep
-			else if (!opts.dotfiles && /(^\.|[\\+|\/+]\.)/.test(name)) return;
+			else if (!opts.dotfiles && /^\.|[\\+|/]\./.test(name)) return;
 
 			let headers = toHeaders(name, stats, isEtag);
 			if (cc) headers['Cache-Control'] = cc;
@@ -212,7 +214,7 @@ export default function (dir, opts = {}) {
 		// NEW END
 		let val = req.headers['accept-encoding'] || '';
 		if (gzips && val.includes('gzip')) extns.unshift(...gzips);
-		if (brots && /(br|brotli)/i.test(val)) extns.unshift(...brots);
+		if (brots && /br/i.test(val)) extns.unshift(...brots);
 		extns.push(...extensions); // [...br, ...gz, orig, ...exts]
 
 		if (pathname.indexOf('%') !== -1) {
diff --git a/packages/integrations/preact/src/server.ts b/packages/integrations/preact/src/server.ts
index 79461c5724..01b2ba1009 100644
--- a/packages/integrations/preact/src/server.ts
+++ b/packages/integrations/preact/src/server.ts
@@ -37,7 +37,7 @@ async function check(
 			// There are edge cases (SolidJS) where Preact *might* render a string,
 			// but components would be <undefined></undefined>
 			// It also might render an empty sting.
-			return html == '' ? false : !/\<undefined\>/.test(html);
+			return html == '' ? false : !/<undefined>/.test(html);
 		} catch (err) {
 			return false;
 		}
diff --git a/packages/integrations/sitemap/test/staticPaths.test.js b/packages/integrations/sitemap/test/staticPaths.test.js
index 0e73537656..4054ad9304 100644
--- a/packages/integrations/sitemap/test/staticPaths.test.js
+++ b/packages/integrations/sitemap/test/staticPaths.test.js
@@ -38,6 +38,6 @@ describe('getStaticPaths support', () => {
 
 	it('should render the endpoint', async () => {
 		const page = await fixture.readFile('./it/manifest');
-		assert.match(page, /I\'m a route in the "it" language./);
+		assert.match(page, /I'm a route in the "it" language./);
 	});
 });
diff --git a/packages/integrations/vue/src/editor.cts b/packages/integrations/vue/src/editor.cts
index 0b62e899ee..0c9642d671 100644
--- a/packages/integrations/vue/src/editor.cts
+++ b/packages/integrations/vue/src/editor.cts
@@ -23,7 +23,7 @@ export function toTSX(code: string, className: string): string {
 		const { scriptSetup } = parsedResult.descriptor;
 
 		if (scriptSetup) {
-			const definePropsType = scriptSetup.content.match(/defineProps<([\S\s]+?)>\s?\(\)/m);
+			const definePropsType = scriptSetup.content.match(/defineProps<([\s\S]+?)>\s?\(\)/);
 			const propsGeneric = scriptSetup.attrs.generic;
 			const propsGenericType = propsGeneric ? `<${propsGeneric}>` : '';
 
@@ -40,7 +40,7 @@ export function toTSX(code: string, className: string): string {
 				// TODO. Find a way to support generics when using defineProps without passing explicit types.
 				// Right now something like this `defineProps({ prop: { type: Array as PropType<T[]> } })`
 				//  won't be correctly typed in Astro.
-				const defineProps = scriptSetup.content.match(/defineProps\([\s\S]+\)/m);
+				const defineProps = scriptSetup.content.match(/defineProps\([\s\S]+\)/);
 
 				if (defineProps) {
 					result = `
diff --git a/packages/integrations/vue/test/app-entrypoint.test.js b/packages/integrations/vue/test/app-entrypoint.test.js
index 5cdae3c049..5c04376366 100644
--- a/packages/integrations/vue/test/app-entrypoint.test.js
+++ b/packages/integrations/vue/test/app-entrypoint.test.js
@@ -41,7 +41,7 @@ describe('App Entrypoint', () => {
 		assert.notEqual(client, undefined);
 
 		const js = await fixture.readFile(client);
-		assert.match(js, /\w+\.component\(\"Bar\"/gm);
+		assert.match(js, /\w+\.component\("Bar"/g);
 	});
 
 	it('loads svg components without transforming them to assets', async () => {
@@ -112,7 +112,7 @@ describe('App Entrypoint no export default', () => {
 		const client = island.getAttribute('renderer-url');
 		assert.notEqual(client, undefined);
 		const js = await fixture.readFile(client);
-		assert.doesNotMatch(js, /\w+\.component\(\"Bar\"/gm);
+		assert.doesNotMatch(js, /\w+\.component\("Bar"/g);
 	});
 
 	it('loads svg components without transforming them to assets', async () => {
@@ -151,7 +151,7 @@ describe('App Entrypoint relative', () => {
 		assert.notEqual(client, undefined);
 
 		const js = await fixture.readFile(client);
-		assert.doesNotMatch(js, /\w+\.component\(\"Bar\"/gm);
+		assert.doesNotMatch(js, /\w+\.component\("Bar"/g);
 	});
 });
 
@@ -182,7 +182,7 @@ describe('App Entrypoint /src/absolute', () => {
 		assert.notEqual(client, undefined);
 
 		const js = await fixture.readFile(client);
-		assert.doesNotMatch(js, /\w+\.component\(\"Bar\"/gm);
+		assert.doesNotMatch(js, /\w+\.component\("Bar"/g);
 	});
 });
 
diff --git a/packages/internal-helpers/src/path.ts b/packages/internal-helpers/src/path.ts
index cc9954ef2c..fbbebc7c9b 100644
--- a/packages/internal-helpers/src/path.ts
+++ b/packages/internal-helpers/src/path.ts
@@ -16,7 +16,7 @@ export function prependForwardSlash(path: string) {
 }
 
 export function collapseDuplicateSlashes(path: string) {
-	return path.replace(/(?<!:)\/\/+/g, '/');
+	return path.replace(/(?<!:)\/{2,}/g, '/');
 }
 
 export function removeTrailingForwardSlash(path: string) {
@@ -86,7 +86,7 @@ export function removeQueryString(path: string) {
 }
 
 export function isRemotePath(src: string) {
-	return /^(http|ftp|https|ws):?\/\//.test(src) || src.startsWith('data:');
+	return /^(?:http|ftp|https|ws):?\/\//.test(src) || src.startsWith('data:');
 }
 
 export function slash(path: string) {
diff --git a/packages/markdown/remark/src/shiki.ts b/packages/markdown/remark/src/shiki.ts
index 492d5a821e..4024d4bc1b 100644
--- a/packages/markdown/remark/src/shiki.ts
+++ b/packages/markdown/remark/src/shiki.ts
@@ -13,7 +13,7 @@ const ASTRO_COLOR_REPLACEMENTS: Record<string, string> = {
 	'--astro-code-background': '--astro-code-color-background',
 };
 const COLOR_REPLACEMENT_REGEX = new RegExp(
-	`(${Object.keys(ASTRO_COLOR_REPLACEMENTS).join('|')})`,
+	`${Object.keys(ASTRO_COLOR_REPLACEMENTS).join('|')}`,
 	'g'
 );
 
diff --git a/packages/telemetry/src/project-info.ts b/packages/telemetry/src/project-info.ts
index 16ea50f3b4..79b9e4f44a 100644
--- a/packages/telemetry/src/project-info.ts
+++ b/packages/telemetry/src/project-info.ts
@@ -91,7 +91,7 @@ function getProjectId(isCI: boolean): Pick<ProjectInfo, 'anonymousProjectId' | '
 	// If we're running in CI, the current working directory is not unique.
 	// If the cwd is a single level deep (ex: '/app'), it's probably not unique.
 	const cwd = process.cwd();
-	const isCwdGeneric = (cwd.match(/[\/|\\]/g) || []).length === 1;
+	const isCwdGeneric = (cwd.match(/[/|\\]/g) || []).length === 1;
 	if (isCI || isCwdGeneric) {
 		return {
 			isGit: false,
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 61ee0ecac6..007f9239d3 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -51,6 +51,9 @@ importers:
       eslint-plugin-prettier:
         specifier: ^5.0.0
         version: 5.1.2(eslint-config-prettier@9.1.0)(eslint@8.56.0)(prettier@3.1.1)
+      eslint-plugin-regexp:
+        specifier: ^2.2.0
+        version: 2.2.0(eslint@8.56.0)
       globby:
         specifier: ^14.0.0
         version: 14.0.0
@@ -8894,6 +8897,11 @@ packages:
     engines: {node: ^12.20.0 || >=14}
     dev: true
 
+  /comment-parser@1.4.1:
+    resolution: {integrity: sha512-buhp5kePrmda3vhc5B9t7pUQXAb2Tnd0qgpkIhPhkHXxJpiPJ11H0ZEU0oBpJ2QztSbzG/ZxMj/CHsYJqRHmyg==}
+    engines: {node: '>= 12.0.0'}
+    dev: true
+
   /common-ancestor-path@1.0.1:
     resolution: {integrity: sha512-L3sHRo1pXXEqX8VU28kfgUY+YGsk09hPqZiZmLacNib6XNTCM8ubYeT7ryXQw8asB1sKgcU5lkB7ONug08aB8w==}
     dev: false
@@ -9633,6 +9641,22 @@ packages:
       synckit: 0.8.8
     dev: true
 
+  /eslint-plugin-regexp@2.2.0(eslint@8.56.0):
+    resolution: {integrity: sha512-0kwpiWiLRVBkVr3oIRQLl196sXP/NF6DQFefv9jtR4ZOgQR+6WID2pIZ0I+wIt54qgBPwBB7Gm2a+ueh8/WsFQ==}
+    engines: {node: ^18 || >=20}
+    peerDependencies:
+      eslint: '>=8.44.0'
+    dependencies:
+      '@eslint-community/eslint-utils': 4.4.0(eslint@8.56.0)
+      '@eslint-community/regexpp': 4.10.0
+      comment-parser: 1.4.1
+      eslint: 8.56.0
+      jsdoc-type-pratt-parser: 4.0.0
+      refa: 0.12.1
+      regexp-ast-analysis: 0.7.1
+      scslre: 0.3.0
+    dev: true
+
   /eslint-scope@7.2.2:
     resolution: {integrity: sha512-dOt21O7lTMhDM+X9mB4GX+DZrZtCUJPL/wlcTqxyrx5IvO0IYtILdtrQGQp+8n5S0gwSVmOf9NQrjMOgfQZlIg==}
     engines: {node: ^12.22.0 || ^14.17.0 || >=16.0.0}
@@ -11165,6 +11189,11 @@ packages:
     dependencies:
       argparse: 2.0.1
 
+  /jsdoc-type-pratt-parser@4.0.0:
+    resolution: {integrity: sha512-YtOli5Cmzy3q4dP26GraSOeAhqecewG04hoO8DY56CH4KJ9Fvv5qKWUCCo3HZob7esJQHCv6/+bnTy72xZZaVQ==}
+    engines: {node: '>=12.0.0'}
+    dev: true
+
   /jsdom@22.1.0:
     resolution: {integrity: sha512-/9AVW7xNbsBv6GfWho4TTNjEo9fe6Zhf9O7s0Fhhr3u+awPwAJMKwAMXnkk5vBxflqLW9hTHX/0cs+P3gW+cQw==}
     engines: {node: '>=16'}
@@ -13755,6 +13784,13 @@ packages:
       strip-indent: 3.0.0
     dev: true
 
+  /refa@0.12.1:
+    resolution: {integrity: sha512-J8rn6v4DBb2nnFqkqwy6/NnTYMcgLA+sLr0iIO41qpv0n+ngb7ksag2tMRl0inb1bbO/esUwzW1vbJi7K0sI0g==}
+    engines: {node: ^12.0.0 || ^14.0.0 || >=16.0.0}
+    dependencies:
+      '@eslint-community/regexpp': 4.10.0
+    dev: true
+
   /regenerator-runtime@0.13.11:
     resolution: {integrity: sha512-kY1AZVr2Ra+t+piVaJ4gxaFaReZVH40AKNo7UCX6W+dEwBo/2oZJzqfuN1qLq1oL45o56cPaTXELwrTh8Fpggg==}
     dev: true
@@ -13763,6 +13799,14 @@ packages:
     resolution: {integrity: sha512-dYnhHh0nJoMfnkZs6GmmhFknAGRrLznOu5nc9ML+EJxGvrx6H7teuevqVqCuPcPK//3eDrrjQhehXVx9cnkGdw==}
     dev: true
 
+  /regexp-ast-analysis@0.7.1:
+    resolution: {integrity: sha512-sZuz1dYW/ZsfG17WSAG7eS85r5a0dDsvg+7BiiYR5o6lKCAtUrEwdmRmaGF6rwVj3LcmAeYkOWKEPlbPzN3Y3A==}
+    engines: {node: ^12.0.0 || ^14.0.0 || >=16.0.0}
+    dependencies:
+      '@eslint-community/regexpp': 4.10.0
+      refa: 0.12.1
+    dev: true
+
   /regexp.prototype.flags@1.5.1:
     resolution: {integrity: sha512-sy6TXMN+hnP/wMy+ISxg3krXx7BAtWVO4UouuCN/ziM9UEne0euamVNafDfvC83bRNr95y0V5iijeDQFUNpvrg==}
     engines: {node: '>= 0.4'}
@@ -14162,6 +14206,15 @@ packages:
     dependencies:
       loose-envify: 1.4.0
 
+  /scslre@0.3.0:
+    resolution: {integrity: sha512-3A6sD0WYP7+QrjbfNA2FN3FsOaGGFoekCVgTyypy53gPxhbkCIjtO6YWgdrfM+n/8sI8JeXZOIxsHjMTNxQ4nQ==}
+    engines: {node: ^14.0.0 || >=16.0.0}
+    dependencies:
+      '@eslint-community/regexpp': 4.10.0
+      refa: 0.12.1
+      regexp-ast-analysis: 0.7.1
+    dev: true
+
   /section-matter@1.0.0:
     resolution: {integrity: sha512-vfD3pmTzGpufjScBh50YHKzEu2lxBWhVEHsNGoEXmCmn2hKGfeNLYMzCJpe8cD7gqX7TJluOVpBkAequ6dgMmA==}
     engines: {node: '>=4'}