Stop the Autoloader from requesting file: URLs in bundled apps

[DmitrySharabin]

Fall back to ./ when import.meta.url is a file: URL on a web page, and name srcPath in the load error.

webpack, Rspack and Parcel replace import.meta.url with the module's path on the build machine. The Autoloader's default path then pointed there. An Autoloader page bundled from v2, in Chromium:

	Before	After
webpack 5.111, Rspack 2.2	file:///…/node_modules/prismjs/dist/languages/css.js: "Not allowed to load local resource"	languages/css.js next to the bundle
Parcel 2.16	file:///node_modules/prismjs/dist/languages/css.js: same error	languages/css.js next to the bundle
Rollup, Rolldown, esbuild, Bun, Vite	languages/css.js next to the bundle	Unchanged

• With dist/languages copied next to the bundle, all eight bundlers load the grammar with no extra settings. The README says so for bundled apps.
• Loading dist/ straight from a server or CDN still finds dist/languages/.
• With esbuild --bundle (IIFE output), import.meta becomes {}. The guard uses ?., so the Autoloader still starts there.
• The issue's repro calls loadLanguages(), which never uses the Autoloader's path. The defect is in the Autoloader's default srcPath.

Closes #4166

🤖 Generated with Claude Code

[netlify]

✅ Deploy Preview for dev-prismjs-com ready!

Name	Link
🔨 Latest commit	1901af7
🔍 Latest deploy log	https://app.netlify.com/projects/dev-prismjs-com/deploys/6ad0c26780e86b2f2d0e2e5e
😎 Deploy Preview	https://deploy-preview-4171--dev-prismjs-com.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
🤖 Make changes	Run an agent on this branch

---

To edit notification comments on pull requests, go to your Netlify project configuration.