Improve regex performance

eslint.config.js

@@ -111,6 +111,8 @@ export default [
 
 			// In some cases, using explicit letter-casing is more performant than the `i` flag
 			'regexp/use-ignore-case': 'off',
+			'regexp/prefer-regexp-exec': 'warn',
+			'regexp/prefer-regexp-test': 'warn',
 		},
 	},
 

packages/astro/e2e/errors.test.js

@@ -88,7 +88,7 @@ test.describe('Error display', () => {
 		expect(fileExists).toBeTruthy();
 
 		const fileContent = await astro.readFile(absoluteFileUrl);
-		const lineNumber = absoluteFileLocation.match(/:(\d+):\d+$/)[1];
+		const lineNumber = /:(\d+):\d+$/.exec(absoluteFileLocation)[1];
 		const highlightedLine = fileContent.split('\n')[lineNumber - 1];
 		expect(highlightedLine).toContain(`@use '../styles/inexistent' as *;`);
 

packages/astro/src/actions/runtime/middleware.ts

@@ -32,6 +32,7 @@ export const onRequest = defineMiddleware(async (context, next) => {
 
 	// Heuristic: If body is null, Astro might've reset this for prerendering.
 	if (import.meta.env.DEV && request.method === 'POST' && request.body === null) {
+		// eslint-disable-next-line no-console
 		console.warn(
 			yellow('[astro:actions]'),
 			'POST requests should not be sent to prerendered pages. If you\'re using Actions, disable prerendering with `export const prerender = "false".'

packages/astro/src/assets/utils/vendor/image-size/types/svg.ts

@@ -1,4 +1,5 @@
 /* eslint-disable @typescript-eslint/non-nullable-type-assertion-style */
+/* eslint-disable regexp/prefer-regexp-exec */
 import type { IImage, ISize } from './interface.ts'
 import { toUTF8String } from './utils.js'
 

packages/astro/src/core/app/index.ts

@@ -501,7 +501,7 @@ export class App {
 	}
 
 	#getDefaultStatusCode(routeData: RouteData, pathname: string): number {
-		if (!routeData.pattern.exec(pathname)) {
+		if (!routeData.pattern.test(pathname)) {
 			for (const fallbackRoute of routeData.fallbackRoutes) {
 				if (fallbackRoute.pattern.test(pathname)) {
 					return 302;

packages/astro/src/core/build/generate.ts

@@ -306,7 +306,7 @@ function getInvalidRouteSegmentError(
 	route: RouteData,
 	staticPath: GetStaticPathsItem
 ): AstroError {
-	const invalidParam = e.message.match(/^Expected "([^"]+)"/)?.[1];
+	const invalidParam = /^Expected "([^"]+)"/.exec(e.message)?.[1];
 	const received = invalidParam ? staticPath.params[invalidParam] : undefined;
 	let hint =
 		'Learn about dynamic routes at https://docs.astro.build/en/core-concepts/routing/#dynamic-routes';
@@ -421,7 +421,7 @@ async function generatePath(
 		// always be rendered
 		route.pathname !== '/' &&
 		// Check if there is a translated page with the same path
-		Object.values(options.allPages).some((val) => pathname.match(val.route.pattern))
+		Object.values(options.allPages).some((val) => val.route.pattern.test(pathname))
 	) {
 		return;
 	}
@@ -503,7 +503,7 @@ function getPrettyRouteName(route: RouteData): string {
 	} else if (route.component.includes('node_modules/')) {
 		// For routes from node_modules (usually injected by integrations),
 		// prettify it by only grabbing the part after the last `node_modules/`
-		return route.component.match(/.*node_modules\/(.+)/)?.[1] ?? route.component;
+		return /.*node_modules\/(.+)/.exec(route.component)?.[1] ?? route.component;
 	} else {
 		return route.component;
 	}

packages/astro/src/core/errors/dev/vite.ts

@@ -41,7 +41,7 @@ export function enhanceViteSSRError({
 		// Vite has a fairly generic error message when it fails to load a module, let's try to enhance it a bit
 		// https://github.com/vitejs/vite/blob/ee7c28a46a6563d54b828af42570c55f16b15d2c/packages/vite/src/node/ssr/ssrModuleLoader.ts#L91
 		let importName: string | undefined;
-		if ((importName = safeError.message.match(/Failed to load url (.*?) \(resolved id:/)?.[1])) {
+		if ((importName = /Failed to load url (.*?) \(resolved id:/.exec(safeError.message)?.[1])) {
 			safeError.title = FailedToLoadModuleSSR.title;
 			safeError.name = 'FailedToLoadModuleSSR';
 			safeError.message = FailedToLoadModuleSSR.message(importName);
@@ -64,9 +64,10 @@ export function enhanceViteSSRError({
 		// Vite throws a syntax error trying to parse MDX without a plugin.
 		// Suggest installing the MDX integration if none is found.
 		if (
+			fileId &&
 			!renderers?.find((r) => r.name === '@astrojs/mdx') &&
-			safeError.message.match(/Syntax error/) &&
-			fileId?.match(/\.mdx$/)
+			/Syntax error/.test(safeError.message) &&
+			/.mdx$/.test(fileId)
 		) {
 			safeError = new AstroError({
 				...MdxIntegrationMissingError,
@@ -78,7 +79,7 @@ export function enhanceViteSSRError({
 
 		// Since Astro.glob is a wrapper around Vite's import.meta.glob, errors don't show accurate information, let's fix that
 		if (/Invalid glob/.test(safeError.message)) {
-			const globPattern = safeError.message.match(/glob: "(.+)" \(/)?.[1];
+			const globPattern = /glob: "(.+)" \(/.exec(safeError.message)?.[1];
 
 			if (globPattern) {
 				safeError.message = InvalidGlob.message(globPattern);

packages/astro/src/events/error.ts

@@ -28,7 +28,7 @@ interface ConfigErrorEventPayload extends ErrorEventPayload {
  */
 const ANONYMIZE_MESSAGE_REGEX = /^(?:\w| )+/;
 function anonymizeErrorMessage(msg: string): string | undefined {
-	const matchedMessage = msg.match(ANONYMIZE_MESSAGE_REGEX);
+	const matchedMessage = ANONYMIZE_MESSAGE_REGEX.exec(msg);
 	if (!matchedMessage?.[0]) {
 		return undefined;
 	}

packages/astro/src/runtime/client/dev-toolbar/ui-library/radio-checkbox.ts

@@ -14,6 +14,7 @@ export class DevToolbarRadioCheckbox extends HTMLElement {
 
 	set radioStyle(value) {
 		if (!styles.includes(value)) {
+			// eslint-disable-next-line no-console
 			console.error(`Invalid style: ${value}, expected one of ${styles.join(', ')}.`);
 			return;
 		}

packages/astro/src/transitions/router.ts

@@ -542,6 +542,7 @@ async function transition(
 		// This log doesn't make it worse than before, where we got error messages about uncaught exceptions, which can't be caught when the trigger was a click or history traversal.
 		// Needs more investigation on root causes if errors still occur sporadically
 		const err = e as Error;
+		// eslint-disable-next-line no-console
 		console.log('[astro]', err.name, err.message, err.stack);
 	}
 }

packages/astro/test/css-order-import.test.js

@@ -126,7 +126,7 @@ describe('CSS ordering - import order', () => {
 
 			const content = await Promise.all(getLinks(html).map((href) => getLinkContent(href)));
 			const css = content.map((c) => c.css).join('');
-			assert.equal(css.match(/\.astro-jsx/).length, 1, '.astro-jsx class is duplicated');
+			assert.equal(/\.astro-jsx/.exec(css).length, 1, '.astro-jsx class is duplicated');
 		});
 	});
 

packages/astro/test/css-order.test.js

@@ -92,8 +92,8 @@ describe('CSS production ordering', () => {
 			assert.ok(content.length, 3, 'there are 3 stylesheets');
 			const [, sharedStyles, pageStyles] = content;
 
-			assert.ok(sharedStyles.css.match(/red/));
-			assert.ok(pageStyles.css.match(/#00f/));
+			assert.ok(/red/.exec(sharedStyles.css));
+			assert.ok(/#00f/.exec(pageStyles.css));
 		});
 
 		it('CSS injected by injectScript comes first because of import order', async () => {

packages/astro/test/solid-component.test.js

@@ -183,11 +183,12 @@ describe.skip('Solid component dev', { todo: 'Check why the test hangs.', skip:
 const createHydrationScriptRegex = (flags) => new RegExp(/_\$HY=/, flags);
 
 function countHydrationScripts(/** @type {string} */ html) {
+	// eslint-disable-next-line regexp/prefer-regexp-exec
 	return html.match(createHydrationScriptRegex('g'))?.length ?? 0;
 }
 
 function getFirstHydrationScriptLocation(/** @type {string} */ html) {
-	return html.match(createHydrationScriptRegex())?.index;
+	return createHydrationScriptRegex().exec(html)?.index;
 }
 
 /**
@@ -202,9 +203,10 @@ function countHydrationEvents(/** @type {string} */ html) {
 	// Number of times a component was hydrated during rendering
 	// We look for the hint "_$HY.r["
 
+	// eslint-disable-next-line regexp/prefer-regexp-exec
 	return html.match(createHydrationEventRegex('g'))?.length ?? 0;
 }
 
 function getFirstHydrationEventLocation(/** @type {string} */ html) {
-	return html.match(createHydrationEventRegex())?.index;
+	return createHydrationEventRegex().exec(html)?.index;
 }

packages/astro/test/ssr-api-route.test.js

@@ -118,7 +118,7 @@ describe('API routes in SSR', () => {
 
 			let count = 0;
 			let exp = /set-cookie:/g;
-			while (exp.exec(response)) {
+			while (exp.test(response)) {
 				count++;
 			}
 

packages/create-astro/src/actions/verify.ts

@@ -84,7 +84,7 @@ async function verifyTemplate(tmpl: string, ref?: string) {
 const GIT_RE = /^(?<repo>[\w.-]+\/[\w.-]+)(?<subdir>[^#]+)?(?<ref>#[\w.-]+)?/;
 
 function parseGitURI(input: string) {
-	const m = input.match(GIT_RE)?.groups;
+	const m = GIT_RE.exec(input)?.groups;
 	if (!m) throw new Error(`Unable to parse "${input}"`);
 	return {
 		repo: m.repo,

packages/db/test/unit/column-queries.test.js

@@ -492,6 +492,5 @@ describe('column queries', () => {
 
 /** @param {string} query */
 function getTempTableName(query) {
-	// eslint-disable-next-line regexp/no-unused-capturing-group
-	return query.match(/Users_([a-z\d]+)/)?.[0];
+	return /Users_[a-z\d]+/.exec(query)?.[0];
 }

packages/db/test/unit/reference-queries.test.js

@@ -163,8 +163,7 @@ describe('reference queries', () => {
 	});
 });
 
-/** @param {string | undefined} query */
+/** @param {string} query */
 function getTempTableName(query) {
-	// eslint-disable-next-line regexp/no-unused-capturing-group
-	return query.match(/User_([a-z\d]+)/)?.[0];
+	return /User_[a-z\d]+/.exec(query)?.[0];
 }

packages/integrations/markdoc/src/content-entry-type.ts

@@ -245,7 +245,7 @@ function raiseValidationErrors({
 			e.error.id !== 'variable-undefined' &&
 			// Ignore missing partial errors.
 			// We will resolve these in `resolvePartials`.
-			!(e.error.id === 'attribute-value-invalid' && e.error.message.match(/^Partial .+ not found/))
+			!(e.error.id === 'attribute-value-invalid' && /^Partial .+ not found/.test(e.error.message))
 		);
 	});
 
@@ -275,7 +275,7 @@ function getUsedTags(markdocAst: Node) {
 	// This is our signal that a tag is being used!
 	for (const { error } of validationErrors) {
 		if (error.id === 'tag-undefined') {
-			const [, tagName] = error.message.match(/Undefined tag: '(.*)'/) ?? [];
+			const [, tagName] = /Undefined tag: '(.*)'/.exec(error.message) ?? [];
 			tags.add(tagName);
 		}
 	}

packages/integrations/mdx/test/units/rehype-optimize-static.test.js

@@ -15,7 +15,7 @@ async function compile(mdxCode, options) {
 	});
 	const code = result.toString();
 	// Capture the returned JSX code for testing
-	const jsx = code.match(/return (.+);\n\}\nexport default function MDXContent/s)?.[1];
+	const jsx = /return (.+);\n\}\nexport default function MDXContent/s.exec(code)?.[1];
 	if (jsx == null) throw new Error('Could not find JSX code in compiled MDX');
 	return dedent(jsx);
 }

packages/integrations/node/src/serve-static.ts

@@ -52,7 +52,7 @@ export function createStaticHandler(app: NodeApp, options: Options) {
 					break;
 				case 'always':
 					// trailing slash is not added to "subresources"
-					if (!hasSlash && !urlPath.match(isSubresourceRegex)) {
+					if (!hasSlash && !isSubresourceRegex.test(urlPath)) {
 						pathname = urlPath + '/' + (urlQuery ? '?' + urlQuery : '');
 						res.statusCode = 301;
 						res.setHeader('Location', pathname);

packages/integrations/vue/src/editor.cts

@@ -24,7 +24,7 @@ export function toTSX(code: string, className: string): string {
 
 		if (scriptSetup) {
 			const codeWithoutComments = scriptSetup.content.replace(/\/\/.*|\/\*[\s\S]*?\*\//g, '');
-			const definePropsType = codeWithoutComments.match(/defineProps<([\s\S]+?)>\s?\(\)/);
+			const definePropsType = /defineProps<([\s\S]+?)>\s?\(\)/.exec(codeWithoutComments);
 			const propsGeneric = scriptSetup.attrs.generic;
 			const propsGenericType = propsGeneric ? `<${propsGeneric}>` : '';
 
@@ -41,7 +41,7 @@ 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 = codeWithoutComments.match(/defineProps\([\s\S]+?\)/);
+				const defineProps = /defineProps\([\s\S]+?\)/.exec(codeWithoutComments);
 				if (defineProps) {
 					result = `
 					import { defineProps } from 'vue';

packages/markdown/remark/src/highlight.ts

@@ -43,14 +43,14 @@ export async function highlightCodeBlocks(tree: Root, highlighter: Highlighter)
 		let languageMatch: RegExpMatchArray | null | undefined;
 		let { className } = node.properties;
 		if (typeof className === 'string') {
-			languageMatch = className.match(languagePattern);
+			languageMatch = languagePattern.exec(className);
 		} else if (Array.isArray(className)) {
 			for (const cls of className) {
 				if (typeof cls !== 'string') {
 					continue;
 				}
 
-				languageMatch = cls.match(languagePattern);
+				languageMatch = languagePattern.exec(cls);
 				if (languageMatch) {
 					break;
 				}

packages/markdown/remark/src/rehype-collect-headings.ts

@@ -20,7 +20,7 @@ export function rehypeHeadingIds(): ReturnType<RehypePlugin> {
 			if (node.type !== 'element') return;
 			const { tagName } = node;
 			if (tagName[0] !== 'h') return;
-			const [, level] = tagName.match(/h([0-6])/) ?? [];
+			const [, level] = /h([0-6])/.exec(tagName) ?? [];
 			if (!level) return;
 			const depth = Number.parseInt(level);
 
@@ -30,7 +30,7 @@ export function rehypeHeadingIds(): ReturnType<RehypePlugin> {
 					return;
 				}
 				if (child.type === 'raw') {
-					if (child.value.match(/^\n?<.*>\n?$/)) {
+					if (/^\n?<.*>\n?$/.test(child.value)) {
 						return;
 					}
 				}