FormDataEvent.formData

The formData read only property of the FormDataEvent interface contains the FormData object representing the data contained in the form when the event was fired.

Syntax

formData = formDataEvent.formData

Returns

A FormData object.

Examples

// grab reference to form

const formElem = document.querySelector('form');

// submit handler

formElem.addEventListener('submit', (e) => {
  // on form submission, prevent default
  e.preventDefault();
 
  // construct a FormData object, which fires the formdata event
  new FormData(formElem);
});

// formdata handler to retrieve data

formElem.addEventListener('formdata', (e) => {
  console.log('formdata fired');
 
  // Get the form data from the event object
  let data = e.formData;
  for (var value of data.values()) {
    console.log(value);
  }
 
  // submit the data via XHR
  var request = new XMLHttpRequest();
  request.open("POST", "/formHandler");
  request.send(data);
});

Specifications

Specification Status Comment
HTML Living Standard
The definition of 'formData' in that specification.
Living Standard

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
formDataChrome Full support 77Edge Full support 79Firefox Full support 72IE No support NoOpera Full support 64Safari No support NoWebView Android Full support 77Chrome Android Full support 77Firefox Android No support NoOpera Android Full support 55Safari iOS No support NoSamsung Internet Android No support No

Legend

Full support  
Full support
No support  
No support

See also