A special file name that sets Cloudflare Pages to advanced mode.

When using a _worker.js file, Cloudflare Pages will be in "advanced mode". Advanced mode disables the dyanmic aspects of the platform:

• The _worker.js file is deployed as is and must be written using the Module Worker syntax.
• Your /functions directory will be ignored.
• All incoming requests will be sent to your bundled worker file.
• You will have parse incoming request URLS with a router such as PatternToPageComponentMap