Content negotiation

+server.js files can be placed in the same directory as +page files, allowing the same route to be either a page or an API endpoint. To determine which, SvelteKit applies the following rules:

  • PUT/PATCH/DELETE requests are always handled by +server.js since they do not apply to pages
  • GET/POST requests are treated as page requests if the accept header prioritises text/html (in other words, it’s a browser page request), else they are handled by +server.js

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