This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The pending read-only property of the SpeechSynthesis interface is a Boolean that returns true if the utterance queue contains as-yet-unspoken utterances.


var amIPending = speechSynthesisInstance.pending;


A Boolean.


var synth = window.speechSynthesis;

var utterance1 = new SpeechSynthesisUtterance('How about we say this now? This is quite a long sentence to say.');
var utterance2 = new SpeechSynthesisUtterance('We should say another sentence too, just to be on the safe side.');


var amIPending = synth.pending; // will return true if utterance 1 is still being spoken and utterance 2 is in the queue


Specification Status Comment
Web Speech API
The definition of 'pending' in that specification.

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 33 (Yes) 49 (49) No support ? 7
Feature Android Chrome Edge Firefox Mobile (Gecko) Firefox OS IE Phone Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) No support 2.0 No support No support 7.1

See also

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 Contributors to this page: abbycar, chrisdavidmills
 Last updated by: abbycar,