javascript-tutorial / javascript-tutorial/en.javascript.info
Exception for CORS
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Description
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.
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the cross-window communication page at javascript.info/cross-window-communication and review its CORS discussion. Add the file: protocol exception and the linked MDN reference, explaining the relevant cross-window messaging workaround; done when the page accurately covers this case.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript
- Domain
- documentation
- Issue type
- Documentation
- Difficulty
- 1/5
- Estimated time
- Under an hour
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 55/100