To resolve the TypeError: Failed to fetch, make sure to pass the correct parameters to. Im trying to make API call to some open APIs and getting the same error every time: TypeError: Failed to fetch. If this is in an 'onSubmit' for example, if the function returns a non-false value, the page reloads, interrupting your fetch.
In your code, since resp.json () is async, the function the fetch is in will return before the fetch completes, but it will have enough time to start the fetch. The URL you have passed to the fetch () method is incorrect, so it throws errors: CORS No ‘Access-Control-Allow-Origin’ header is present on the requested resource. This can happen in some callbacks that don't return false.
Adding mode:'no-cors' to the request header guarantees that no response will be available in the responseĪdding a "non standard" header, line 'access-control-allow-origin' will trigger a OPTIONS preflight request, which your server must handle correctly in order for the POST request to even be sent 1 The reason you have passed an incorrect URL to the fetch () method.
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