fixed AudioContext error on Chrome, removed unicode support.

Author: ozdemirburak

README.md

@@ -3,7 +3,7 @@
 [![npm-version]][npm] [![npm-downloads]][npm] [![travis-ci]][travis]
 
 Morse code encoder and decoder with no dependencies supports Latin, Cyrillic, Greek, Hebrew,
-Arabic, Persian, Japanese, Korean, Thai, and Unicode (Chinese and the others) characters with audio generation
+Arabic, Persian, Japanese, Korean and Thai characters with audio generation
 functionality using the [Web Audio API](https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API).
 
 See Morse Translator in action: [https://morsify.net](https://morsify.net)
@@ -72,14 +72,12 @@ Set the priority option according to the list below.
 - 10 => Japanese
 - 11 => Korean
 - 12 => Thai
-- 13 => Unicode (Chinese and the others)
 
 ```js
 const cyrillic = morsify.encode('Ленинград', { priority: 5 }); // .-.. . -. .. -. --. .-. .- -..
 const greek = morsify.decode('... .- --. .- .--. .--', { priority: 6 }); // ΣΑΓΑΠΩ
 const hebrew = morsify.decode('.. ––– . –––', { dash: '–', dot: '.', priority: 7 }); // יהוה
 const japanese = morsify.encode('NEWS', { priority: 10, dash: '－', dot: '・', separator: '　' }); // －・　・　・－－　・・・
-const chinese = morsify.encode('你好', { priority: 13 }); // -..----.--..... -.--..-.-----.-
 const characters = morsify.characters({ dash: '–', dot: '•' }); // {'1': {'A': '•–', ...}, ..., '11': {'ㄱ': '•–••', ...}}
 const arabicAudio = morsify.audio('البراق', { // generates the morse .- .-.. -... .-. .- --.- then generates the audio from it
   unit: 0.1, // period of one unit, in seconds, 1.2 / c where c is speed of transmission, in words per minute

dist/morsify.js

@@ -470,27 +470,6 @@ function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "functi
     return swapped;
   };
 
-  var unicodeToMorse = function unicodeToMorse(character) {
-    var ch = [];
-
-    for (var i = 0; i < character.length; i++) {
-      ch[i] = ('00' + character.charCodeAt(i).toString(16)).slice(-4);
-    }
-
-    return parseInt(ch.join(''), 16).toString(2);
-  };
-
-  var unicodeToHex = function unicodeToHex(morse, options) {
-    morse = morse.replace(new RegExp('\\' + options.dot, 'g'), '0').replace(new RegExp('\\' + options.dash, 'g'), '1');
-    morse = parseInt(morse, 2);
-
-    if (isNaN(morse)) {
-      return options.invalid;
-    }
-
-    return decodeURIComponent(JSON.parse('"' + "\\u" + morse.toString(16) + '"'));
-  };
-
   var getOptions = function getOptions(options) {
     options = options || {};
     options.oscillator = options.oscillator || {};
@@ -526,7 +505,7 @@ function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "functi
         }
       }
 
-      return parseInt(options.priority) === 13 ? unicodeToMorse(character) : options.invalid;
+      return options.invalid;
     }).join(options.separator).replace(/0/g, options.dot).replace(/1/g, options.dash);
   };
 
@@ -538,15 +517,19 @@ function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "functi
         return swapped[characters];
       }
 
-      return parseInt(options.priority) === 13 ? unicodeToHex(characters, options) : options.invalid;
+      return options.invalid;
     }).join('');
   };
 
-  var isBrowser = typeof window !== 'undefined';
-  var AudioContext = isBrowser ? window.AudioContext || window.webkitAudioContext : null;
-  var context = isBrowser ? new AudioContext() : null;
+  var AudioContext = null;
+  var context = null;
 
   var audio = function audio(text, opts) {
+    if (AudioContext === null && typeof window !== 'undefined') {
+      AudioContext = window.AudioContext || window.webkitAudioContext;
+      context = new AudioContext();
+    }
+
     var options = getOptions(opts);
     var morse = encode(text, opts);
     var oscillator = context.createOscillator();

dist/morsify.min.js

@@ -1,6 +1,6 @@
 {
   "name": "morsify",
-  "version": "2.2.1",
+  "version": "2.3.0",
   "description": "Morse code translator, Morse encoder and decoder which can also generate audio.",
   "keywords": [
     "morsify",

package.json

@@ -133,23 +133,6 @@
     return swapped;
   };
 
-  const unicodeToMorse = (character) => {
-    const ch = [];
-    for (let i = 0; i < character.length; i++) {
-      ch[i] = ('00' + character.charCodeAt(i).toString(16)).slice(-4);
-    }
-    return parseInt(ch.join(''), 16).toString(2);
-  };
-
-  const unicodeToHex = (morse, options) => {
-    morse = morse.replace(new RegExp('\\' + options.dot, 'g'), '0').replace(new RegExp('\\' + options.dash, 'g'), '1');
-    morse = parseInt(morse, 2);
-    if (isNaN(morse)) {
-      return options.invalid;
-    }
-    return decodeURIComponent(JSON.parse('"'+ '\\u' + morse.toString(16) +'"'));
-  };
-
   const getOptions = (options) => {
     options = options || {};
     options.oscillator = options.oscillator || {};
@@ -180,7 +163,7 @@
           return characters[set][character];
         }
       }
-      return parseInt(options.priority) === 13 ? unicodeToMorse(character) : options.invalid;
+      return options.invalid;
     }).join(options.separator).replace(/0/g, options.dot).replace(/1/g, options.dash);
   };
 
@@ -190,15 +173,20 @@
       if (typeof swapped[characters] !== 'undefined') {
         return swapped[characters];
       }
-      return parseInt(options.priority) === 13 ? unicodeToHex(characters, options) : options.invalid;
+      return options.invalid;
     }).join('');
   };
 
-  const isBrowser = typeof window !== 'undefined';
-  const AudioContext = isBrowser ? window.AudioContext || window.webkitAudioContext : null;
-  const context = isBrowser ? new AudioContext() : null;
+  let AudioContext = null;
+  let context = null;
 
   const audio = (text, opts) => {
+
+    if (AudioContext === null && typeof window !== 'undefined') {
+      AudioContext = window.AudioContext || window.webkitAudioContext;
+      context = new AudioContext();
+    }
+
     const options = getOptions(opts);
     const morse = encode(text, opts);
     const oscillator = context.createOscillator();