diff --git a/mail_preview_base/static/src/js/preview.js b/mail_preview_base/static/src/js/preview.js
index 873408e..d67ea82 100644
--- a/mail_preview_base/static/src/js/preview.js
+++ b/mail_preview_base/static/src/js/preview.js
@@ -3,7 +3,7 @@
     License LGPL-3.0 or later (http://www.gnu.org/licenses/lgpl).
  **********************************************************************************/
 
-odoo.define("mail_preview_base.preview", function(require) {
+odoo.define("mail_preview_base.preview", function (require) {
     "use strict";
 
     var DocumentViewer = require("mail.DocumentViewer");
@@ -12,10 +12,10 @@ odoo.define("mail_preview_base.preview", function(require) {
     var AttachmentBox = require("mail.AttachmentBox");
 
     DocumentViewer.include({
-        init: function(parent, attachments) {
+        init: function (parent, attachments) {
             this._super.apply(this, arguments);
             var self = this;
-            _.forEach(this.attachment, function(attachment) {
+            _.forEach(this.attachment, function (attachment) {
                 if (
                     attachment.mimetype === "application/pdf" ||
                     attachment.type === "text"
@@ -26,7 +26,7 @@ odoo.define("mail_preview_base.preview", function(require) {
                 }
             });
             this.attachment = this.attachment.concat(
-                _.filter(attachments, function(attachment) {
+                _.filter(attachments, function (attachment) {
                     return self._checkAttachment(attachment);
                 })
             );
@@ -36,10 +36,10 @@ odoo.define("mail_preview_base.preview", function(require) {
             This function is a hook, it will allow to define new kind of
             records
         */
-        _checkAttachment: function() {
+        _checkAttachment: function () {
             return false;
         },
-        _getContentUrl: function(attachment) {
+        _getContentUrl: function (attachment) {
             return (
                 "/web/content/" +
                 attachment.id +
@@ -47,10 +47,10 @@ odoo.define("mail_preview_base.preview", function(require) {
                 window.encodeURIComponent(attachment.name)
             );
         },
-        _getImageUrl: function(attachment) {
+        _getImageUrl: function (attachment) {
             return "/web/image/" + attachment.id;
         },
-        _hasPreview: function(type, attachment) {
+        _hasPreview: function (type, attachment) {
             return (
                 type === "image" ||
                 type === "video" ||
@@ -60,8 +60,8 @@ odoo.define("mail_preview_base.preview", function(require) {
     });
 
     AttachmentBox.include({
-        init: function(parent, record, attachments) {
-            _.each(attachments, function(attachment) {
+        init: function (parent, record, attachments) {
+            _.each(attachments, function (attachment) {
                 attachment.has_preview = DocumentViewer.prototype._hasPreview(
                     attachment.mimetype && attachment.mimetype.split("/").shift(),
                     attachment
@@ -72,12 +72,12 @@ odoo.define("mail_preview_base.preview", function(require) {
     });
 
     var FieldPreviewViewer = DocumentViewer.extend({
-        init: function(parent, attachments, activeAttachmentID, model, field) {
+        init: function (parent, attachments, activeAttachmentID, model, field) {
             this.modelName = model;
             this.fieldName = field;
             this._super.apply(this, arguments);
         },
-        _onDownload: function(e) {
+        _onDownload: function (e) {
             e.preventDefault();
             window.location =
                 "/web/content/" +
@@ -90,7 +90,7 @@ odoo.define("mail_preview_base.preview", function(require) {
                 "datas" +
                 "?download=true";
         },
-        _getContentUrl: function(attachment) {
+        _getContentUrl: function (attachment) {
             return (
                 "/web/content/" +
                 this.modelName +
@@ -102,7 +102,7 @@ odoo.define("mail_preview_base.preview", function(require) {
                 window.encodeURIComponent(attachment.name)
             );
         },
-        _getImageUrl: function(attachment) {
+        _getImageUrl: function (attachment) {
             return (
                 "/web/image/" +
                 this.modelName +
@@ -118,7 +118,7 @@ odoo.define("mail_preview_base.preview", function(require) {
         events: _.extend({}, basic_fields.FieldBinaryFile.prototype.events, {
             "click .preview_file": "_previewFile",
         }),
-        _previewFile: function(event) {
+        _previewFile: function (event) {
             event.stopPropagation();
             event.preventDefault();
             var attachmentViewer = new FieldPreviewViewer(
@@ -130,7 +130,7 @@ odoo.define("mail_preview_base.preview", function(require) {
             );
             attachmentViewer.appendTo($("body"));
         },
-        _renderReadonly: function() {
+        _renderReadonly: function () {
             this._super.apply(this, arguments);
             if (this.value) {
                 this.attachment = {