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

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
formData
77
79
72
No
64
No
77
77
No
55
No
12.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/FormDataEvent/formData