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diff --git a/src/components/page-view-element.js b/src/components/page-view-element.js
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+++ b/src/components/page-view-element.js
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+/**
+@license
+Copyright (c) 2018 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+
+import { LitElement } from '@polymer/lit-element';
+
+export class PageViewElement extends LitElement {
+  // Only render this page if it's actually visible.
+  _shouldRender(props, changedProps, old) {
+    return props.active;
+  }
+
+  static get properties() {
+    return {
+      active: Boolean
+    }
+  }
+}