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Exception for CORS #3759

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jrvjrv opened this issue Sep 13, 2024 · 0 comments

jrvjrv commented Sep 13, 2024

In your page, https://javascript.info/cross-window-communication, an important CORS exception, to me at least, is that the protocol "file:" is always considered to be cross-domain. If you are writing javascript that has to work from a "file:" url, it can't access other local files directly (https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS/Errors/CORSRequestNotHttp). You have to use cross-window messaging to talk into/out-of an iframe.

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