diff --git a/web/pdf_attachment_viewer.js b/web/pdf_attachment_viewer.js
index eb4a3034b..8223cbd4a 100644
--- a/web/pdf_attachment_viewer.js
+++ b/web/pdf_attachment_viewer.js
@@ -35,13 +35,12 @@ class PDFAttachmentViewer {
    * @param {PDFAttachmentViewerOptions} options
    */
   constructor({ container, eventBus, downloadManager, }) {
-    this.attachments = null;
-
     this.container = container;
     this.eventBus = eventBus;
     this.downloadManager = downloadManager;
 
-    this._renderedCapability = createPromiseCapability();
+    this.reset();
+
     this.eventBus.on('fileattachmentannotation',
       this._appendAttachment.bind(this));
   }
diff --git a/web/pdf_outline_viewer.js b/web/pdf_outline_viewer.js
index 18d21471a..7aee5b626 100644
--- a/web/pdf_outline_viewer.js
+++ b/web/pdf_outline_viewer.js
@@ -36,12 +36,11 @@ class PDFOutlineViewer {
    * @param {PDFOutlineViewerOptions} options
    */
   constructor({ container, linkService, eventBus, }) {
-    this.outline = null;
-    this.lastToggleIsShow = true;
-
     this.container = container;
     this.linkService = linkService;
     this.eventBus = eventBus;
+
+    this.reset();
   }
 
   reset() {