Function isJSRequest

packages/vite/src/node/utils.ts:294–303

(url: string)

const knownJsSrcRE =
  /\.(?:[jt]sx?|m[jt]s|vue|marko|svelte|astro|imba|mdx)(?:$|\?)/
export const isJSRequest = (url: string): boolean => {
  url = cleanUrl(url)
  if (knownJsSrcRE.test(url)) {
    return true
  }
  if (!path.extname(url) && url[url.length - 1] !== '/') {
    return true
  }
  return false
}

export const isCSSRequest = (request: string): boolean =>
  CSS_LANGS_RE.test(request)