code-boxx/0-JS-VOICE-CMD.MD

## 0-JS-VOICE-CMD.MD

      
    Raw
  

              0-JS-VOICE-CMD.MD
            
          
    JAVASCRIPT VOICE COMMANDS

https://code-boxx.com/voice-commands-javascript-speech-recognition/
LICENSE

Copyright by Code Boxx
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

  
## voice-command.css
* {
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}
#vwrap {
  box-sizing: border-box;
  width: 100%;
  height: 100px;
  padding: 10px;
  transition: all 0.3s;
}

## voice-command.html
<!DOCTYPE html>
<html>
  <head>
    <title>Simple Voice Command Demo</title>
    <link rel="stylesheet" href="voice-command.css">
    <script src="voice-command.js"></script>
  </head>
  <body>
    <!-- (A) DEMO WRAPPER -->
    <div id="vwrap"></div>

    <!-- (B) DEMO BUTTON -->
    <input type="button" id="vbtn" value="Loading" disabled>
    <div>Try "power on", "power off", or "say hello".</div>
  </body>
</html>

## voice-command.js
var voice = {
  // (A) INIT VOICE COMMAND
  wrap : null,  // html demo <div> wrapper
  btn : null,   // html demo button
  recog : null, // speech recognition object
  init : () => {
    // (A1) GET HTML ELEMENTS
    voice.wrap = document.getElementById("vwrap");
    voice.btn = document.getElementById("vbtn");

    // (A2) GET MIC ACCESS PERMISSION
    navigator.mediaDevices.getUserMedia({ audio: true })
    .then(stream => {
      // (A3) SPEECH RECOGNITION OBJECT & SETTINGS
      const SpeechRecognition = window.SpeechRecognition || window.webkitSpeechRecognition;
      voice.recog = new SpeechRecognition();
      voice.recog.lang = "en-US";
      voice.recog.continuous = false;
      voice.recog.interimResults = false;

      // (A4) ON SPEECH RECOGNITION - RUN CORRESPONDING COMMAND
      voice.recog.onresult = evt => {
        let said = evt.results[0][0].transcript.toLowerCase();
        if (cmd[said]) { cmd[said](); }
        else { said += " (command not found)"; }
        voice.wrap.innerHTML = said;
        voice.stop();
      };

      // (A5) ON SPEECH RECOGNITION ERROR
      voice.recog.onerror = err => console.error(evt);

      // (A6) READY!
      voice.btn.disabled = false;
      voice.stop();
    })
    .catch(err => {
      console.error(err);
      voice.wrap.innerHTML = "Please enable access and attach a microphone.";
    });
  },

  // (B) START SPEECH RECOGNITION
  start : () => {
    voice.recog.start();
    voice.btn.onclick = voice.stop;
    voice.btn.value = "Speak Now Or Click Again To Cancel";
  },

  // (C) STOP/CANCEL SPEECH RECOGNITION
  stop : () => {
    voice.recog.stop();
    voice.btn.onclick = voice.start;
    voice.btn.value = "Press To Speak";
  }
};
window.addEventListener("DOMContentLoaded", voice.init);

// (D) COMMANDS LIST
var cmd = {
  "power on" : () => {
    voice.wrap.style.backgroundColor = "yellow";
    voice.wrap.style.color = "black";
  },

  "power off" : () => {
    voice.wrap.style.backgroundColor = "black";
    voice.wrap.style.color = "white";
  },

  "say hello" : () => {
    alert("Hello World!");
  }
};
	* {
	font-family: Arial, Helvetica, sans-serif;
	box-sizing: border-box;
	}
	#vwrap {
	box-sizing: border-box;
	width: 100%;
	height: 100px;
	padding: 10px;
	transition: all 0.3s;
	}
	<!DOCTYPE html>
	<html>
	<head>
	<title>Simple Voice Command Demo</title>
	<link rel="stylesheet" href="voice-command.css">
	<script src="voice-command.js"></script>
	</head>
	<body>
	<!-- (A) DEMO WRAPPER -->
	<div id="vwrap"></div>

	<!-- (B) DEMO BUTTON -->
	<input type="button" id="vbtn" value="Loading" disabled>
	<div>Try "power on", "power off", or "say hello".</div>
	</body>
	</html>
	var voice = {
	// (A) INIT VOICE COMMAND
	wrap : null, // html demo <div> wrapper
	btn : null, // html demo button
	recog : null, // speech recognition object
	init : () => {
	// (A1) GET HTML ELEMENTS
	voice.wrap = document.getElementById("vwrap");
	voice.btn = document.getElementById("vbtn");

	// (A2) GET MIC ACCESS PERMISSION
	navigator.mediaDevices.getUserMedia({ audio: true })
	.then(stream => {
	// (A3) SPEECH RECOGNITION OBJECT & SETTINGS
	const SpeechRecognition = window.SpeechRecognition \|\| window.webkitSpeechRecognition;
	voice.recog = new SpeechRecognition();
	voice.recog.lang = "en-US";
	voice.recog.continuous = false;
	voice.recog.interimResults = false;

	// (A4) ON SPEECH RECOGNITION - RUN CORRESPONDING COMMAND
	voice.recog.onresult = evt => {
	let said = evt.results[0][0].transcript.toLowerCase();
	if (cmd[said]) { cmd[said](); }
	else { said += " (command not found)"; }
	voice.wrap.innerHTML = said;
	voice.stop();
	};

	// (A5) ON SPEECH RECOGNITION ERROR
	voice.recog.onerror = err => console.error(evt);

	// (A6) READY!
	voice.btn.disabled = false;
	voice.stop();
	})
	.catch(err => {
	console.error(err);
	voice.wrap.innerHTML = "Please enable access and attach a microphone.";
	});
	},

	// (B) START SPEECH RECOGNITION
	start : () => {
	voice.recog.start();
	voice.btn.onclick = voice.stop;
	voice.btn.value = "Speak Now Or Click Again To Cancel";
	},

	// (C) STOP/CANCEL SPEECH RECOGNITION
	stop : () => {
	voice.recog.stop();
	voice.btn.onclick = voice.start;
	voice.btn.value = "Press To Speak";
	}
	};
	window.addEventListener("DOMContentLoaded", voice.init);

	// (D) COMMANDS LIST
	var cmd = {
	"power on" : () => {
	voice.wrap.style.backgroundColor = "yellow";
	voice.wrap.style.color = "black";
	},

	"power off" : () => {
	voice.wrap.style.backgroundColor = "black";
	voice.wrap.style.color = "white";
	},

	"say hello" : () => {
	alert("Hello World!");
	}
	};