Creating PDF free text annotations using JavaScript

1WebViewer(...)
2  .then(instance => {
3    const { Annotations, annotationManager, documentViewer } = instance.Core;
4
5    documentViewer.addEventListener('documentLoaded', () => {
6      const freeText = new Annotations.FreeTextAnnotation();
7      freeText.PageNumber = 1;
8      freeText.X = 150;
9      freeText.Y = 200;
10      freeText.Width = 150;
11      freeText.Height = 50;
12      freeText.setPadding(new Annotations.Rect(0, 0, 0, 0));
13      freeText.setContents('My Text');
14      freeText.FillColor = new Annotations.Color(0, 255, 255);
15      freeText.FontSize = '16pt';
16
17      annotationManager.addAnnotation(freeText, { autoFocus: false });
18      annotationManager.redrawAnnotation(freeText);
19    })
20  })