Open thumbnail js in Javascript Pdfviewer control

The PDF Viewer library allows you to open the thumbnail pane programmatically using the openThumbnailPane() method.

The following steps are used to open the thumbnail.

Step 1: Follow the steps provided in the link to create a simple PDF Viewer sample.

Step 2: Use the following code snippet to open thumbnail.

<button id="openThumbnail">Open Thumbnail Pane</button>

document.getElementById('openThumbnail').addEventListener('click', () => {
  // Open Thumbnail pane
  viewer.thumbnailViewModule.openThumbnailPane();
});

Find the sample, how to open the thumbnail pane programmatically