MouseEvent: shiftKey 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 MouseEvent.shiftKey read-only property is a boolean value that indicates whether the shift key was pressed or not when a given mouse event occurs.
Value
A boolean value, where true indicates that the key is pressed, and false indicates that the key is not pressed.
Examples
This example logs the shiftKey property when you trigger a click event.
HTML
html
<p>Click anywhere to test the <code>shiftKey</code> property.</p> <p id="log"></p> JavaScript
js
let log = document.querySelector("#log"); document.addEventListener("click", logKey); function logKey(e) { log.textContent = `The shift key is pressed: ${e.shiftKey}`; } Result
Specifications
| Specification |
|---|
| UI Events # dom-mouseevent-shiftkey |