Add Bookmarks to PDFs Showcase Demo Code Sample

1// ES6 Compliant Syntax
2// GitHub Copilot v1, Claude Sonnet 4 (Preview), 2025-09-17
3// File: showcase-demos/add-personal-bookmark-pdf/index.js
4
5
6import WebViewer from '@pdftron/webviewer';
7
8// Function to initialize and load the WebViewer with user bookmarks feature.
9function addUserBookmarks() {
10  const element = document.getElementById('viewer');
11  if (!element) {
12    console.error('Viewer div not found.');
13    return;
14  }
15
16  WebViewer({
17    path: '/lib',
18    initialDoc: 'https://apryse.s3.us-west-1.amazonaws.com/public/files/samples/Report_2011.pdf',
19    licenseKey: 'YOUR_LICENSE_KEY',
20    enableFilePicker: true,
21  }, element).then(instance => {
22
23    instance.UI.enableFeatures([instance.UI.Feature.Initials]);
24
25    // Reset state on document change.
26    instance.Core.documentViewer.addEventListener('documentLoaded', () => {
27      instance.UI.openElements(['tabPanel']);
28      instance.UI.setActiveTabInPanel({ tabPanel: 'tabPanel', tabName: 'bookmarksPanel' });
29      instance.UI.enableBookmarkIconShortcutVisibility();
30
31      setBookmarks({});
32      setBookmarkName('My Bookmark');
33      setPageNumber(1);
34      createBookmarkControls();
35    });
36
37    instance.UI.addEventListener('userBookmarksChanged', (e) => {
38      console.log('User bookmarks updated:', e.detail);
39
40    });
41  });
42}
43// Bookmarks state
44let bookmarks = {};
45
46//Usage: 'setBookmarks({ ...bookmarks, [pageNumber]: bookmarkName });'
47function setBookmarks(newBookmarks) {
48  bookmarks = newBookmarks;
49  // Optionally, update the UI or perform other actions here.
50}
51
52// Page number state
53let pageNumber = 1;
54function setPageNumber(val) {
55  pageNumber = val;
56}
57
58// Bookmark name state
59let bookmarkName = 'My Bookmark';
60function setBookmarkName(val) {
61  bookmarkName = val;
62}
63
64// Error state
65let error = '';
66function setError(val) {
67  error = val;
68  // if empty, or null, hide error div.
69  if (val && val !== '' && val.length !== 0) {
70    console.error('Bookmark Error:', val);
71
72  } else {
73    console.log('Clearing bookmark error');
74  }
75
76  const errorDiv = document.querySelector('#bookmark-error-div');
77  if (errorDiv) {
78    errorDiv.textContent = val;
79    errorDiv.style.display = 'block';
80  }
81}
82
83// Button enabled state
84let isButtonEnabled = true;
85function setIsButtonEnabled(enabled) {
86  isButtonEnabled = enabled;
87  const button = document.querySelector('.bookmark-add-btn');
88  if (button) {
89    button.disabled = !enabled;
90  }
91}
92
93// Function to create a new bookmark.
94function createNewBookmark() {
95  const doc = WebViewer.getInstance().Core.documentViewer.getDocument();
96  const bookmarksObject = bookmarks;
97  const bookmarkName = document.querySelector('.bookmark-title-input').value || 'My Bookmark';
98  setPageNumber(document.querySelector('.bookmark-page-input').value || 1);
99
100  console.log('Creating new bookmark at page', pageNumber, 'with name', bookmarkName);
101
102  // Validate bookmarksObject exists.
103  if (!bookmarksObject) {
104    console.log('Bookmarks feature is not available.');
105    return;
106  }
107
108  // Validate doc exists.
109  if (!doc) {
110    console.log('Document is not loaded.');
111    return;
112  }
113
114  // Validate pageNumber is valid.
115  if (isNaN(pageNumber) || pageNumber < 1 || pageNumber > doc.getPageCount()) {
116    setError('Please enter a valid page number.');
117  } else {
118    bookmarks[pageNumber - 1] = bookmarkName;
119    WebViewer.getInstance().UI.importBookmarks(bookmarksObject);
120    setBookmarks({ ...bookmarksObject, [pageNumber - 1]: bookmarkName });
121    setIsButtonEnabled(true);
122    setError('');
123  }
124}
125
126// Function to created bookmark controls.
127function createBookmarkControls() {
128  console.log('Loading bookmark controls');
129
130//Checking if controls already exist.
131
132  const existingControls = document.getElementById('controls-container');
133  if (existingControls) {
134    resetBookmarkControls();
135    console.log('Bookmark controls already exist');
136    return;
137  }
138
139  // Create a container for all controls (label, dropdown, and buttons).
140  const controlsContainer = document.createElement('div');
141  controlsContainer.className = 'control-container';
142  controlsContainer.id = 'controls-container';
143  const element = document.getElementById('viewer');
144  if (!element) {
145    console.error('Viewer div not found.');
146    return;
147  }
148  element.insertBefore(controlsContainer, element.firstChild);
149  
150  console.log('controls.js loaded, createBookmarkControls:', window.createBookmarkControls);
151  // Dynamically load controls.js if not already loaded.
152  if (!window.createBookmarkControls) {
153    const script = document.createElement('script');
154    script.src = '/showcase-demos/add-personal-bookmark-pdf/controls.js';
155    script.onload = function () {
156      console.log('Loaded controls', createControls);
157      console.log('createNewBookmarks:', createNewBookmark);
158      console.log('resetBookmarkControls:', resetBookmarkControls);
159
160      createControls('controls-container', createNewBookmark, resetBookmarkControls);
161
162    };
163    document.head.appendChild(script);
164  }
165}
166
167function resetBookmarkControls() {
168  
169  setBookmarks({});//Clear bookmarks state.
170  setPageNumber(1);
171  setBookmarkName('My Bookmark');
172  setError('');
173  setIsButtonEnabled(true);
174  
175  console.log('Bookmark controls reset');
176}
177
178// Initialize the WebViewer and add user bookmarks feature.
179addUserBookmarks();
180
181
182