Web/API/GlobalEventHandlers/oninput

The oninput property of the GlobalEventHandlers mixin is an EventHandler that processes input events on the <input>, <select>, and <textarea> elements. It also handles these events on elements where contenteditable or designMode are turned on.

Note: Unlike oninput, the onchange event handler is not necessarily called for each alteration to an element's value.

Syntax

target.oninput = functionRef;

Value

functionRef is a function name or a function expression. The function receives an InputEvent object as its sole argument.

Example

This example logs the number of characters in an <input> element, every time you modify its contents.

HTML

<input type="text" placeholder="Type something here to see its length." size="50">
<p id="log"></p>

JavaScript

let input = document.querySelector('input');
let log = document.getElementById('log');

input.oninput = handleInput;

function handleInput(e) {
  log.textContent = `The field's value is
      ${e.target.value.length} character(s) long.`;
}

Result

Specifications

Specification	Status	Comment
HTML Living StandardThe definition of 'oninput' in that specification.	Living Standard	Initial definition

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`oninput`	Chrome Full support Yes	Edge Full support 12	Firefox Full support 2	IE Full support 9	Opera Full support 10	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes

Legend

Full support: Full support

The following links discuss compatibility issues and fixes that may be helpful when working with older browsers:

A HTML5 Browser maze, oninput support
Fixing oninput in IE Using html5Widgets includes polyfill for IE6-8
Mathias Bynens suggests binding to both input and keydown
oninput event | dottoro has notes about bugginess in IE9
Bug 312094 - Add support for <select oninput>