The formdata
event fires after the entry list representing the form's data is constructed. This happens when the form is submitted, but can also be triggered by the invocation of a FormData()
constructor.
General info
Bubbles | No |
Cancelable | No |
Interface | FormDataEvent
|
Event handler property | GlobalEventHandlers.onformdata
|
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);
});
The onformdata
version would look like this:
formElem.onformdata = (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 StandardThe definition of 'formdata' in that specification. | Unknown |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
formdata event
|
Chrome
Full support 77 |
Edge
Full support 79 |
Firefox
Full support 72 |
IE
No support No |
Opera
Full support 64 |
Safari
No support No |
WebView Android
Full support 77 |
Chrome Android
Full support 77 |
Firefox Android
No support No |
Opera Android
Full support 55 |
Safari iOS
No support No |
Samsung Internet Android
Full support 12.0 |
Legend
- Full support
- Full support
- No support
- No support
See also
- HTML
<form>
element FormDataEvent
HTMLFormElement: formdata event by Mozilla Contributors is licensed under CC-BY-SA 2.5.