Reordering PDF pages using JavaScript

1WebViewer(...)
2  .then(instance => {
3    const { documentViewer } = instance.Core;
4
5    documentViewer.addEventListener('documentLoaded', async () => {
6      const doc = documentViewer.getDocument();
7      const page1 = 1, page2 = 2, page3 = 3;
8
9      const pagesToMove = [page2, page3];
10      const insertBefore = page1;
11
12      await doc.movePages(pagesToMove, insertBefore);
13      // pages are now in the order of [page2, page3, page1];
14    });
15  });