0.4.0

Features

• Native support detection #14

To detect native speech synthesis support use:

window.nativeSpeechSynthesisSupport(); // true, false

We use polyfill only when speech synthesis is not available. To initialize speech synthesis use:

var fallbackSpeechSynthesis = window.getSpeechSynthesis();
var fallbackSpeechSynthesisUtterance = window.getSpeechSynthesisUtterance();

var u = new fallbackSpeechSynthesisUtterance('Hello World');
u.lang = 'en-US';
u.volume = 1.0;
u.rate = 1.0;
u.onend = function(event) { console.log('Finished in ' + event.elapsedTime + ' seconds.'); };
fallbackSpeechSynthesis.speak(u);

0.3.3

Features

• Enhance splitting text by delimeters #10

Split long text by multiple delimeters like ., ,, (space) and then hard split.
This will enhance user experience due to natural pause between audio playback.

0.3.2

Fixes

• Split long words

Google translate limit is 100 characters, if the word is longer there is a network error.
Long words need to be too splitted. #9

0.3.1

Fixes

• fix punctation network error

Encode text URI Component #7

0.3.0

Features

• Split long text into multiple requests

Google Translate limit is 100 characters, we need to split longer text and make multiple requests. #5

0.2.1

Feauters

• identify the polyfill usage

 var u = new window.SpeechSynthesisUtterancePolyfill('Hello World');
 u.isPolyfill; // true

 window.speechSynthesisPolyfill.isPolyfill; // true

Fixes

• lint
  • rename speechSynthesisPolyfill into SpeechSynthesisPolyfill

0.2.0

Features

• Rename speechSynthesis into speechSynthesisPolyfill and and SpeechSynthesisUtterance into SpeechSynthesisUtterancePolyfill

Now you can use speech-synthesis polyfill this way:

// Initialize polyfill
var fallbackSpeechSynthesis = window.speechSynthesis || window.speechSynthesisPolyfill;
var fallbackSpeechSynthesisUtterance = window.SpeechSynthesisUtterance || window.SpeechSynthesisUtterancePolyfill;

var u = new fallbackSpeechSynthesisUtterance('Hello World');
u.lang = 'en-US';
u.volume = 1.0;
u.rate = 1.0;
u.onend = function(event) { console.log('Finished in ' + event.elapsedTime + ' seconds.'); };
fallbackSpeechSynthesis.speak(u);

0.1.1

Add

• SpeechSynthesisUtterancePolyfill
• speechSynthesisPolyfill

into window object because it is unable to override speechSynthesis in Firefox browser.

0.1.0

Usage

var u = new SpeechSynthesisUtterance('Hello World');
u.lang = 'en-US';
u.volume = 1.0;
u.rate = 1.0;
u.onend = function(event) { console.log('Finished in ' + event.elapsedTime + ' seconds.'); };
speechSynthesis.speak(u);

CORS proxy server

u.corsProxyServer = 'http://www.corsproxy.com/';

Supported attributes and methods

SpeechSynthesis Attributes

• pending
• speaking
• paused

SpeechSynthesis Methods

• speak()
• cancel()
• pause()
• resume()
• getVoices()

SpeechSynthesisUtterance Attributes

• text
• lang
• voiceURI
• volume
• rate
• pitch

SpeechSynthesisUtterance Events

• onstart
• onend
• onerror
• onpause
• onresume
• onmark
• onboundary

SpeechSynthesisEvent Attributes

• charIndex
• elapsedTime
• name

SpeechSynthesisVoice

• voiceURI
• name
• lang
• localService
• default

Voice depends on google translate service.

SpeechSynthesisVoiceList

• length
• item