Web Speech API

Demo detecting words

by kmturley

HTML

<div class="output" id="output">Say something...</div>

CSS

html,
body {
    height: 100%;
    margin: 0;
    overflow: hidden;
}

body {
    background-color: #fff;
    box-sizing: border-box;
    color: #333;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-weight: normal;
    font-size: 3rem;
    padding: 2rem;
    position: relative;
}

.output {
    color: #000;
    bottom: 2rem;
    position: absolute;
}

.output span {
    color: #6195ED;
}

JavaScript

var SpeechRecognition = SpeechRecognition || webkitSpeechRecognition,
    recognition = new SpeechRecognition(),
    output = document.getElementById('output');

recognition.continuous = true;
recognition.interimResults = true;
recognition.start();
recognition.onstart = function(e) {
    console.log('onstart', e);
};
recognition.onend = function(e) {
    console.log('onend', e);
};
recognition.onresult = function(e) {
	console.log('onresult', e);
    if (typeof(e.results) == 'undefined') {
    	console.log('onresult restart');
        recognition.stop();
        recognition.start();
        return;
    }
    generate(e.results);
};
recognition.onspeechend = function(e) {
    console.log('onspeechend', e);
};
recognition.onerror = function(e) {
    console.log('onerror', e);
};

function generate(items) {
	var i = 0,
    	html = '';
    for (i = 0; i < items.length; i += 1) {
        if (check(items[i][0].transcript)) {
            html += '<span>' + items[i][0].transcript + '</span>';
		} else {
			html += items[i][0].transcript;
		}
    }
    output.innerHTML = html;
};

function check(text) {
    if (text.indexOf('weather') !== -1) {
        console.log('weather');
        return true;
    } else {
		return false;
	}
}