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The MouseEvent.metaKey read-only property is a Boolean 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.

Note: On Macintosh keyboards, this key is the command key (). On Windows keyboards, this key is the Windows key ().


var metaKeyPressed = instanceOfMouseEvent.metaKey

Return value

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


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


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


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

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



Specification Status Comment
Document Object Model (DOM) Level 3 Events Specification
The definition of 'MouseEvent.metaKey' in that specification.
Obsolete No change from Document Object Model (DOM) Level 2 Events Specification.
Document Object Model (DOM) Level 2 Events Specification
The definition of 'MouseEvent.metaKey' in that specification.
Obsolete Initial definition.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
metaKeyChrome Full support YesEdge Full support 12Firefox Full support YesIE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes


Full support  
Full support

See also

Document Tags and Contributors

Contributors to this page: mdnwebdocs-bot, mfluehr, fscholz, libbymc, fredj, teoli, amycb, Jeremie
Last updated by: mdnwebdocs-bot,