Request: formData() method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨April 2021⁩.

Note: This feature is available in Web Workers.

The formData() method of the Request interface reads the request body and returns it as a promise that resolves with a FormData object.

Syntax

formData()

Parameters

None.

Return value

A Promise that resolves with a FormData object.

Examples

const formData = new FormData();
const fileField = document.querySelector('input[type="file"]');
formData.append("username", "abc123");
formData.append("avatar", fileField.files[0]);
const request = new Request("/myEndpoint", {
 method: "POST",
 body: formData,
});
request.formData().then((data) => {
 // do something with the formdata sent in the request
});