MouseEvent.metaKey

The MouseEvent.metaKey read-only property is a boolean value that indicates whether the meta key was pressed or not when a given mouse event occurs.

Be aware that many operating systems bind special functionality to the meta key, so this property may be false even when the key is actually pressed. On Windows, for example, this key may open the Start menu.

Syntax

var metaKeyPressed = instanceOfMouseEvent.metaKey

Return value

A boolean value, where true indicates that the key is pressed, and false indicates that the key is not pressed.

Example

This example logs the metaKey property when you trigger a click event.

HTML

<p>Click anywhere to test the <code>metaKey</code> property.</p>
<p id="log"></p>

JavaScript

let log = document.querySelector('#log');
document.addEventListener('click', logKey);

function logKey(e) {
  log.textContent = `The meta key is pressed: ${e.metaKey}`;
}

Result

Specifications

Browser compatibility

See also

• MouseEvent