Add client-side CORS solutions to error documentation#43423
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Add client-side CORS solutions to error documentation#43423
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Add a "Client-side considerations" section to the CORS errors landing page covering: avoiding preflight via simple requests, using no-cors mode for opaque responses, and proxy servers. Also add a "If you don't control the server" section to the CORSMissingAllowOrigin error page pointing to client-side alternatives. Fixes mdn#39378
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Summary
no-corsmode for opaque responses, and proxy serversCORSMissingAllowOriginerror page pointing to these client-side alternativesMotivation
The CORS error documentation focuses entirely on server-side fixes. Developers who don't control the server have no guidance. A maintainer commented "Please feel free to change this doc in whatever way you feel appropriate."
Fixes #39378.
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