OptionalbodyA BodyInit object or null to set request's body.
OptionalcacheA string indicating how the request will interact with the browser's cache to set request's cache.
OptionalcredentialsA string indicating whether credentials will be sent with the request always, never, or only when sent to a same-origin URL. Sets request's credentials.
OptionalfilenameThe filename to use when uploading the file.
OptionalheadersA Headers object, an object literal, or an array of two-item arrays to set request's headers.
OptionalintegrityA cryptographic hash of the resource to be fetched by request. Sets request's integrity.
OptionalkeepaliveA boolean to set request's keepalive.
OptionalmethodA string to set request's method.
OptionalmodeA string to indicate whether the request will use CORS, or will be restricted to same-origin URLs. Sets request's mode.
OptionalonCallback invoked when a chunk of data is received.
Useful for streaming or processing data as it arrives.
Each chunk is a Uint8Array<ArrayBuffer> containing the raw bytes.
Note: This feature uses response.clone() internally. The cloned stream shares
the same underlying data source (via tee()), so it does NOT double memory usage.
However, if the two streams consume data at different speeds, chunks may be buffered
temporarily until both streams have read them.
The raw data chunk received from the response stream.
OptionalonCallback invoked during download to report progress.
Receives an IOResult<FetchProgress>:
Ok(FetchProgress) - Progress update with byte countsErr(Error) - If Content-Length header is missing (called once)Note: This feature uses response.clone() internally. The cloned stream shares
the same underlying data source (via tee()), so it does NOT double memory usage.
However, if the two streams consume data at different speeds, chunks may be buffered
temporarily until both streams have read them.
The progress result, either success with progress data or error.
OptionalpriorityOptionalredirectA string indicating whether request follows redirects, results in an error upon encountering a redirect, or returns the redirect (in an opaque fashion). Sets request's redirect.
OptionalreferrerA string whose value is a same-origin URL, "about:client", or the empty string, to set request's referrer.
OptionalreferrerA referrer policy to set request's referrerPolicy.
OptionalretryRetry options.
Can be a number (shorthand for retries count) or an options object.
// Retry up to 3 times on network errors
const result = await fetchT('https://api.example.com/data', {
retry: 3,
});
// Detailed configuration
const result = await fetchT('https://api.example.com/data', {
retry: {
retries: 3,
delay: 1000,
when: [500, 502],
onRetry: (error, attempt) => console.log(error),
},
});
OptionalsignalAn AbortSignal to set request's signal.
OptionaltimeoutMaximum time in milliseconds to wait for the request to complete.
If exceeded, the request is automatically aborted with a TimeoutError.
Must be a positive number.
OptionalwindowCan only be null. Used to disassociate request from any Window.
Request init options for uploadFile.