PDF Viewer with annotations in Angular

Question

Hi,

 I am a beginner of Angular. I am working on a sample application wherein I want to load a PDF file, view, edit and save it. In addition, I also want to perform annotations like write comments, adding shapes, images, etc.

I had come across this PDFTron Webviewer (https://www.pdftron.com/samples/web/samples/viewing/viewing/

) which has all the features I am looking for, but it’s a licensed one.

I have tried “pdf-viewer”, “ng2-pdfjs-viewer”, but these have only basic features like open file, download, print and traverse through pages, zoom-on, zoom-out.

Please help me in how to add comments and do annotations in the PDF file from Angular application.

Thanks in advance.