title: How can we add annotations, drawings and images in pdf file using javascript
body: <p><strong>Without using libraries</strong> how can we add annotations(edit text, highlighting, underline etc) and drawing circles rectangles and adding images to pdf file with the use of javascript.</p>
  <blockquote>
  <p>One more thing how this javascript will work on cross platforms(Web +
  Android + IoS). I need a simple abstract for this to understand how JS
  will manipulate PDF file.</p>
  </blockquote>
  <p><code>Edit*</code>
  Any open source library/SDK etc also acceptable that can perform on android and iOS</p>