FormDataEvent: FormDataEvent() constructor

Baseline Widely available

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

The FormDataEvent() constructor creates a new FormDataEvent object.

Syntax

js
new FormDataEvent(type, formEventInit)

Parameters

type

A string with the name of the event. It is case-sensitive and browsers always set it to formdata.

options

An object that, in addition of the properties defined in Event(), can have the following properties:

formData

A FormData object to pre-populate the FormDataEvent with. This would then be accessed through the FormDataEvent.formData property.

Return value

A new FormDataEvent object.

Examples

js
const fd = new FormData();
fd.append("test", "test");

const fdEv = new FormDataEvent("formdata", { formData: fd });

for (const value of fdEv.formData.values()) {
  console.log(value);
}

Specifications

Specification
HTML
# the-formdataevent-interface

Browser compatibility

desktop mobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
FormDataEvent() constructor
Chrome – Full support
Chrome 77 (Release date: 2019-09-10)
footnote Full support
Edge – Full support
Edge 79 (Release date: 2020-01-15)
footnote Full support
Firefox – Full support
Firefox 72 (Release date: 2020-01-07)
footnote Full support
Opera – Full support
Opera 64 (Release date: 2019-10-07)
footnote Full support
Safari – Full support
Safari 15 (Release date: 2021-09-20)
footnote Full support
Chrome Android – Full support
Chrome Android 77 (Release date: 2019-09-10)
footnote Full support
Firefox for Android – Full support
Firefox for Android 79 (Release date: 2020-07-28)
footnote Full support
Opera Android – Full support
Opera Android 55 (Release date: 2019-12-03)
footnote Full support
Safari on iOS – Full support
Safari on iOS 15 (Release date: 2021-09-20)
footnote Full support
Samsung Internet – Full support
Samsung Internet 12 (Release date: 2020-06-19)
footnote Full support
WebView Android – Full support
WebView Android 77 (Release date: 2019-09-10)
footnote Full support
WebView on iOS – Full support
WebView on iOS 15 (Release date: 2021-09-20)
footnote Full support

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support

See also