Document: activeElement property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

The activeElement read-only property of the Document interface returns the Element within the DOM that currently has focus.

Often activeElement will return a HTMLInputElement or HTMLTextAreaElement object if it has the text selection at the time. If so, you can get more detail by using the object's selectionStart and selectionEnd properties. Other times the focused element might be a <select> element (menu) or an <input> element.

Typically a user can press the tab key to move the focus around the page among focusable elements, and use the space bar to activate one (that is, to press a button or toggle a radio button). Which elements are focusable varies depending on the platform and the browser's current configuration. For example, on macOS systems, elements that aren't text input elements are not typically focusable by default.

Note: Focus (which element is receiving user input events) is not the same thing as selection (the currently highlighted part of the document). You can get the current selection using window.getSelection().

Value

The Element which currently has focus, <body> or null if there is no focused element.

Examples

HTML

html
<p>Select some text from one of the text areas below:</p>

<form>
  <textarea name="ta-example-one" id="ta-example-one" rows="7" cols="40">
This is Text Area One. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec tincidunt, lorem a porttitor molestie, odio nibh iaculis libero, et accumsan nunc orci eu dui.</textarea
  >
  <textarea name="ta-example-two" id="ta-example-two" rows="7" cols="40">
This is Text Area Two. Fusce ullamcorper, nisl ac porttitor adipiscing, urna orci egestas libero, ut accumsan orci lacus laoreet diam. Morbi sed euismod diam.</textarea
  >
</form>

<p>Active element ID: <em id="output-element"></em></p>
<p>Selected text: <em id="output-text"></em></p>

JavaScript

js
function onMouseUp(e) {
  const activeTextarea = document.activeElement;
  const selection = activeTextarea.value.substring(
    activeTextarea.selectionStart,
    activeTextarea.selectionEnd,
  );

  const outputElement = document.getElementById("output-element");
  const outputText = document.getElementById("output-text");
  outputElement.textContent = activeTextarea.id;
  outputText.textContent = selection;
}

const textarea1 = document.getElementById("ta-example-one");
const textarea2 = document.getElementById("ta-example-two");
textarea1.addEventListener("mouseup", onMouseUp, false);
textarea2.addEventListener("mouseup", onMouseUp, false);

Result

Specifications

Specification
HTML
# dom-documentorshadowroot-activeelement-dev

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
activeElement

Legend

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

Full support
Full support
Partial support
Partial support
Has more compatibility info.

See also