diff --git a/mail_preview_base/static/src/js/preview.js b/mail_preview_base/static/src/js/preview.js
index c488fde..873408e 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");
@@ -12,12 +12,13 @@ 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) {
-                if (attachment.mimetype === 'application/pdf' ||
-                    attachment.type === 'text'
+            _.forEach(this.attachment, function(attachment) {
+                if (
+                    attachment.mimetype === "application/pdf" ||
+                    attachment.type === "text"
                 ) {
                     attachment.source_url = self._getContentUrl(attachment);
                 } else {
@@ -25,7 +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);
                 })
             );
@@ -35,41 +36,48 @@ 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) {
-            return "/web/content/" + attachment.id +"?filename=" +
-                window.encodeURIComponent(attachment.name);
+        _getContentUrl: function(attachment) {
+            return (
+                "/web/content/" +
+                attachment.id +
+                "?filename=" +
+                window.encodeURIComponent(attachment.name)
+            );
         },
-        _getImageUrl: function (attachment) {
+        _getImageUrl: function(attachment) {
             return "/web/image/" + attachment.id;
         },
-        _hasPreview: function (type, attachment) {
-            return type === 'image' ||
-            type === 'video' ||
-            attachment.mimetype === 'application/pdf';
+        _hasPreview: function(type, attachment) {
+            return (
+                type === "image" ||
+                type === "video" ||
+                attachment.mimetype === "application/pdf"
+            );
         },
     });
 
     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);
+                    attachment.mimetype && attachment.mimetype.split("/").shift(),
+                    attachment
+                );
             });
             this._super.apply(this, arguments);
         },
     });
 
     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/" +
@@ -82,19 +90,27 @@ odoo.define("mail_preview_base.preview", function (require) {
                 "datas" +
                 "?download=true";
         },
-        _getContentUrl: function (attachment) {
-            return "/web/content/" +
-                this.modelName + '/' +
-                attachment.id + '/' +
+        _getContentUrl: function(attachment) {
+            return (
+                "/web/content/" +
+                this.modelName +
+                "/" +
+                attachment.id +
+                "/" +
                 this.fieldName +
                 "?filename=" +
-                window.encodeURIComponent(attachment.name);
+                window.encodeURIComponent(attachment.name)
+            );
         },
-        _getImageUrl: function (attachment) {
-            return "/web/image/" +
-                this.modelName + '/' +
-                attachment.id + '/' +
-                this.fieldName;
+        _getImageUrl: function(attachment) {
+            return (
+                "/web/image/" +
+                this.modelName +
+                "/" +
+                attachment.id +
+                "/" +
+                this.fieldName
+            );
         },
     });
 
@@ -102,7 +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(
@@ -114,7 +130,7 @@ odoo.define("mail_preview_base.preview", function (require) {
             );
             attachmentViewer.appendTo($("body"));
         },
-        _renderReadonly: function () {
+        _renderReadonly: function() {
             this._super.apply(this, arguments);
             if (this.value) {
                 this.attachment = {
@@ -125,9 +141,7 @@ odoo.define("mail_preview_base.preview", function (require) {
                 };
                 var mimetype = this.recordData.res_mimetype;
                 var type = mimetype.split("/").shift();
-                if (
-                    DocumentViewer.prototype._hasPreview(type, this.attachment)
-                ) {
+                if (DocumentViewer.prototype._hasPreview(type, this.attachment)) {
                     this.$el.prepend(
                         $("<span/>").addClass("fa fa-search preview_file")
                     );
@@ -143,5 +157,4 @@ odoo.define("mail_preview_base.preview", function (require) {
         FieldPreviewBinary: FieldPreviewBinary,
         DocumentViewer: DocumentViewer,
     };
-
 });
diff --git a/mail_preview_base/static/src/xml/preview.xml b/mail_preview_base/static/src/xml/preview.xml
index c5ce02f..9600a84 100644
--- a/mail_preview_base/static/src/xml/preview.xml
+++ b/mail_preview_base/static/src/xml/preview.xml
@@ -1,17 +1,25 @@
-<?xml version="1.0" encoding="UTF-8"?>
+<?xml version="1.0" encoding="UTF-8" ?>
 <templates xml:space="preserve">
     <t t-extend="DocumentViewer.Content">
         <t t-jquery=".o_viewer_img" t-operation="attributes">
-            <attribute name="t-attf-src">#{widget.activeAttachment.source_url}?unique=1&amp;signature=#{widget.activeAttachment.checksum}</attribute>
+            <attribute
+                name="t-attf-src"
+            >#{widget.activeAttachment.source_url}?unique=1&amp;signature=#{widget.activeAttachment.checksum}</attribute>
         </t>
         <t t-jquery=".o_viewer_pdf" t-operation="attributes">
-            <attribute name="t-attf-src">/web/static/lib/pdfjs/web/viewer.html?file=#{widget.activeAttachment.source_url}</attribute>
+            <attribute
+                name="t-attf-src"
+            >/web/static/lib/pdfjs/web/viewer.html?file=#{widget.activeAttachment.source_url}</attribute>
         </t>
         <t t-jquery=".o_viewer_video > source" t-operation="attributes">
-            <attribute name="t-attf-src">#{widget.activeAttachment.source_url}</attribute>
+            <attribute
+                name="t-attf-src"
+            >#{widget.activeAttachment.source_url}</attribute>
         </t>
         <t t-jquery=".o_viewer_text:first" t-operation="attributes">
-            <attribute name="t-attf-src">#{widget.activeAttachment.source_url}</attribute>
+            <attribute
+                name="t-attf-src"
+            >#{widget.activeAttachment.source_url}</attribute>
         </t>
     </t>
 
@@ -22,7 +30,7 @@
                 defined on the preview.
                 TODO: Set the has_preview on a function...
             -->
-            <t t-set="has_preview" t-value="has_preview || attachment.has_preview"/>
+            <t t-set="has_preview" t-value="has_preview || attachment.has_preview" />
         </t>
     </t>
 </templates>
diff --git a/mail_preview_base/template/assets.xml b/mail_preview_base/template/assets.xml
index a12c52a..afe0cf3 100644
--- a/mail_preview_base/template/assets.xml
+++ b/mail_preview_base/template/assets.xml
@@ -6,12 +6,22 @@
 
   -->
 <odoo>
-    <template id="assets_backend" name="mail_preview_base_assets" inherit_id="web.assets_backend">
+    <template
+        id="assets_backend"
+        name="mail_preview_base_assets"
+        inherit_id="web.assets_backend"
+    >
         <xpath expr="//script[last()]" position="after">
-            <script type="text/javascript" src="/mail_preview_base/static/src/js/preview.js" />
+            <script
+                type="text/javascript"
+                src="/mail_preview_base/static/src/js/preview.js"
+            />
         </xpath>
         <xpath expr="//link[last()]" position="after">
-            <link rel="stylesheet" href="/mail_preview_base/static/src/scss/preview.scss" />
+            <link
+                rel="stylesheet"
+                href="/mail_preview_base/static/src/scss/preview.scss"
+            />
         </xpath>
     </template>
 </odoo>