Javascript fetch6/12/2023 ![]() Invalid URL or scheme, or using a scheme that fetch does not support, or using a scheme that is not supported for a particular request mode.įetch('blob:///', ) The header object must contain exactly two elements. The request was aborted due to a call to the AbortController abort() method.Ĭan occur for the following reasons: Reason auto: Automatically determine the priority of the fetch request relative to other requests of the same type (default).low: A low priority fetch request relative to other requests of the same type.high: A high priority fetch request relative to other requests of the same type.Specifies the priority of the fetch request relative to other requests of the same type. Fetch with the keepalive flag is a replacement for theĪn AbortSignal object instance allows you to communicate with aįetch request and abort it if desired via an AbortController. The keepalive option can be used to allow the request to outlive Strict-origin-when-cross-origin, or unsafe-url. Specifies the referrer policy to use for the request. Same-origin URL, about:client, or an empty string. See WHATWG fetch standard for more information.Ī string specifying the referrer of the request. manual: Caller intends to process the response in another context.error: Abort with an error if a redirect occurs.Unless otherwise stated the redirect mode is set to follow. follow: Automatically follow redirects.The possible values, default, no-store, reload, no-cache, force-cache, and only-if-cached, are documented in the article for the cache property of the Request object. cacheĪ string indicating how the request will interact with the browser's HTTP cache. Note: Credentials may be included in simple and "final" cross-origin requests, but should not be included in CORS preflight requests. Tells browsers to include credentials in both same- and cross-origin requests, and always use any credentials sent back in responses. Tells browsers to include credentials with requests to same-origin URLs, and use any credentials sent back in responses from same-origin URLs. Tells browsers to exclude credentials from the request, and ignore any credentials sent back in the response (e.g., any Set-Cookie header). Must be one of the following strings: omit The mode you want to use for the request, e.g., cors,Ĭontrols what browsers do with credentials ( cookies, HTTP authentication entries, and TLS client certificates). Note that a request using the GET or HEAD method cannot have a body. This latest possibility is still experimental check the compatibility information to verify you can use it. This can be a Blob, an ArrayBuffer, a TypedArray, a DataView,Ī FormData, a URLSearchParams, string object or literal, bodyĪny body that you want to add to your request: Note: The Authorization HTTP header may be added to a request, but will be removed if the request is redirected cross-origin.
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