How to know if webkitSpeechRecognition is started?

问题

I'm making a bot to listen to my voice.
So i did :

this.recognition = new webkitSpeechRecognition();

I can do this to start listen :

this.recognition.start();

And this to stop listen :

this.recognition.stop();

But do you know a function that will return me true if this.recognition is started and false if it's stopped ? Like "isStarted()" ?

Thanks.

回答1:

You can do this by raising a flag variable on the onstart and onend events:

var recognition = new webkitSpeechRecognition();
var recognizing = false;

recognition.onstart = function () {
    recognizing = true;
};

recognition.onend = function () {
    recognizing = false;
};

recognition.onerror = function (event) {
    recognizing = false;
};

if (recognizing) {
    // Do stuff
}

来源：https://stackoverflow.com/questions/44226827/how-to-know-if-webkitspeechrecognition-is-started