cc

app/assets/javascripts/vue/direct-upload-controller.js

-/*global Vue */
+/*global ActiveStorage, Vue */
 Vue.DirectUploadController = function DirectUploadController (input, file, url) {
     'use strict';
     this.input = input;
     this.file = file;
     this.url = url;
-    this.directUpload = new ActiveStorage.DirectUpload(this.file, this.url, this)
-    this.dispatch("initialize");
-}
+    this.directUpload = new ActiveStorage.DirectUpload(this.file, this.url, this);
+    this.dispatch('initialize');
+};
 
 Vue.DirectUploadController.prototype.start = function (callback) {
     'use strict';
     this.directUpload.create(function (error, blob) {
-        this.dispatch("end");
+        this.dispatch('end');
         if (error) {
-            console.log(error);
+            console.error(error);
         } else {
             callback(blob);
         }
     }.bind(this));
-}
+};
 
 Vue.DirectUploadController.prototype.uploadRequestDidProgress = function (event) {
     'use strict';
-    var progress = event.loaded / event.total * 100
+    var progress = event.loaded / event.total * 100;
     if (progress) {
-        this.dispatch("progress", { "progress": progress });
+        this.dispatch('progress', { 'progress': progress });
     }
-}
+};
 
 Vue.DirectUploadController.prototype.dispatch = function (name, detail) {
-    var event = document.createEvent("Event"),
+    'use strict';
+    var event = document.createEvent('Event'),
         eventName = 'direct-upload:' + name,
+        eventDetail = detail || {},
         disabled = this.input.disabled;
-    detail = detail || {};
-    detail.file = this.file;
-    detail.id = this.directUpload.id;
+    eventDetail.file = this.file;
+    eventDetail.id = this.directUpload.id;
     event.initEvent(eventName, true, true);
-    event.detail = detail;
+    event.detail = eventDetail;
 
     this.input.disabled = false;
     this.input.dispatchEvent(event);
     this.input.disabled = disabled;
 
     return event;
-}
+};
 
 // DirectUpload delegate
 
 Vue.DirectUploadController.prototype.directUploadWillStoreFileWithXHR = function (xhr) {
     'use strict';
-    xhr.upload.addEventListener("progress", this.uploadRequestDidProgress.bind(this));
-}
\ No newline at end of file
+    xhr.upload.addEventListener('progress', this.uploadRequestDidProgress.bind(this));
+};