No-Library (pure JS), HTML, CSS, JavaScript
A document wide handler for multiple events
Mootools 1.4.5, HTML, CSS, JavaScript
A "countup timer" also known as a stopwatch, starts counting when a particular event happens (in this case examples shown with trigger events being Page load and Button click).
This example shows you how to render a PDF with text-selection enabled, in pdf.js
Convert PDF to HTML5 canvas