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KeyboardEvent: isComposing property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨January 2020⁩.

The KeyboardEvent.isComposing read-only property returns a boolean value indicating if the event is fired within a composition session, i.e., after compositionstart and before compositionend.

Value

A boolean.

Examples

const kbdEvent = new KeyboardEvent("syntheticKey", false);
console.log(kbdEvent.isComposing); // return false

Specifications

Specification
UI Events>
# dom-keyboardevent-iscomposing>

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Opera Safari Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet WebView Android WebView on iOS
isComposing 56 79 31 43 10.1 56 31 43 10.3 6.0 56 10.3

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/isComposing