BugFix: use `getAttribute` method

lib/views/not_found.html

@@ -36,11 +36,7 @@
 <div id="content-main" class="content-main content-main-not-found page-list"
   data-path="{{ path }}"
   data-path-shortname="{{ path|path2name }}"
-  data-page-id="{% if page %}{{ page._id.toString() }}{% endif %}"
   data-current-user="{% if user %}{{ user._id.toString() }}{% endif %}"
-  data-page-revision-id="{% if revision %}{{ revision._id.toString() }}{% endif %}"
-  data-page-revision-created="{% if revision %}{{ revision.createdAt|datetz('U') }}{% endif %}"
-  data-page-is-seen="{% if page and page.isSeenUser(user) %}1{% else %}0{% endif %}"
   >
 
   <ul class="nav nav-tabs hidden-print">

resource/js/app.js

@@ -34,9 +34,9 @@ let pageRevisionCreatedAt = null;
 let pagePath;
 let pageContent = '';
 if (mainContent !== null) {
-  pageId = mainContent.attributes['data-page-id'].value;
-  pageRevisionId = mainContent.attributes['data-page-revision-id'].value;
-  pageRevisionCreatedAt = +mainContent.attributes['data-page-revision-created'].value;
+  pageId = mainContent.getAttribute('data-page-id');
+  pageRevisionId = mainContent.getAttribute('data-page-revision-id');
+  pageRevisionCreatedAt = +mainContent.getAttribute('data-page-revision-created');
   pagePath = mainContent.attributes['data-path'].value;
   const rawText = document.getElementById('raw-text-original');
   if (rawText) {

resource/js/components/Page/RevisionUrl.js

@@ -17,7 +17,7 @@ export default class RevisionUrl extends React.Component {
       fontSize: "1em"
     }
 
-    const url = (this.props.pageId === '')
+    const url = (this.props.pageId == null)
         ? decodeURIComponent(location.href)
         : `${location.origin}/${this.props.pageId}`;
     const copiedText = this.props.pagePath + '\n' + url;
@@ -33,6 +33,6 @@ export default class RevisionUrl extends React.Component {
 }
 
 RevisionUrl.propTypes = {
-  pageId: PropTypes.string.isRequired,
+  pageId: PropTypes.string,
   pagePath: PropTypes.string.isRequired,
 };