changed string concatation process

.eslintrc

@@ -11,6 +11,9 @@
         ]
       }
     ],
+    "prefer-promise-reject-errors":[
+      "off"
+    ],
     "symbol-description": [
       "off"
     ],

index.js

@@ -6,25 +6,26 @@ class WebVTTConverter {
   blobToBuffer() {
     return new Promise((resolve, reject) => {
       const reader = new FileReader();
-      reader.addEventListener('loadend', event => {
+      reader.addEventListener('loadend', (event) => {
         const buf = event.target.result;
         resolve(new Uint8Array(buf));
       });
       reader.addEventListener('error', () => reject('Error while reading the Blob object'));
-      reader.readAsArrayBuffer(this.resource)
+      reader.readAsArrayBuffer(this.resource);
     });
   }
 
-  toVTT(utf8str) {
+  static toVTT(utf8str) {
     return utf8str
-    .replace(/\{\\([ibu])\}/g, '</$1>')
-    .replace(/\{\\([ibu])1\}/g, '<$1>')
-    .replace(/\{([ibu])\}/g, '<$1>')
-    .replace(/\{\/([ibu])\}/g, '</$1>')
-    .replace(/(\d\d:\d\d:\d\d),(\d\d\d)/g, '$1.$2') + '\r\n\r\n';
+      .replace(/\{\\([ibu])\}/g, '</$1>')
+      .replace(/\{\\([ibu])1\}/g, '<$1>')
+      .replace(/\{([ibu])\}/g, '<$1>')
+      .replace(/\{\/([ibu])\}/g, '</$1>')
+      .replace(/(\d\d:\d\d:\d\d),(\d\d\d)/g, '$1.$2')
+      .concat('\r\n\r\n');
   }
 
-  toTypedArray(str) {
+  static toTypedArray(str) {
     const result = [];
     str.split().forEach((each, index) => {
       result.push(parseInt(str.substring(index, index + 2), 16));
@@ -37,12 +38,12 @@ class WebVTTConverter {
       if (!(this.resource instanceof Blob)) return reject('Expecting resource to be a Blob but something else found.');
       if (!(FileReader)) return reject('No FileReader constructor found');
       if (!TextDecoder) return reject('No TextDecoder constructor found');
-      this.blobToBuffer()
-      .then(buffer => {
-        const utf8str = new TextDecoder('utf-8').decode(buffer);
-        const vttString = 'WEBVTT FILE\r\n\r\n';
-        console.log(this.toTypedArray(vttString.concat(utf8str)));
-      });
+      WebVTTConverter.blobToBuffer()
+        .then((buffer) => {
+          const utf8str = new TextDecoder('utf-8').decode(buffer);
+          const vttString = 'WEBVTT FILE\r\n\r\n';
+          console.log(WebVTTConverter.toTypedArray(vttString.concat(utf8str)));
+        });
     });
   }
 }

package.json

@@ -4,7 +4,8 @@
   "description": "Convert SRT format subtitle to WebVTT on the fly over HTML5 environmentø",
   "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "webpack-dev-server"
   },
   "repository": {
     "type": "git",