StringUtil (#1861)

* Add StringUtil class

* Use StringUtil

1 files changed, 2 insertions, 5 deletions

diff --git a/ext/js/media/audio-downloader.js b/ext/js/media/audio-downloader.js
index e3b507b4..4bc4cf1b 100644
--- a/ext/js/media/audio-downloader.js
+++ b/ext/js/media/audio-downloader.js
@@ -19,6 +19,7 @@
  * JsonSchema
  * NativeSimpleDOMParser
  * SimpleDOMParser
+ * StringUtil
  */
 
 class AudioDownloader {
@@ -257,7 +258,7 @@ class AudioDownloader {
             throw new Error('Could not retrieve audio');
         }
 
-        const data = this._arrayBufferToBase64(arrayBuffer);
+        const data = StringUtil.arrayBufferToBase64(arrayBuffer);
         const contentType = response.headers.get('Content-Type');
         return {data, contentType};
     }
@@ -288,10 +289,6 @@ class AudioDownloader {
         return digest;
     }
 
-    _arrayBufferToBase64(arrayBuffer) {
-        return btoa(String.fromCharCode(...new Uint8Array(arrayBuffer)));
-    }
-
     _createSimpleDOMParser(content) {
         if (typeof NativeSimpleDOMParser !== 'undefined' && NativeSimpleDOMParser.isSupported()) {
             return new NativeSimpleDOMParser(content);