what is web application code example

Example 1: what is web development

Web development is the work involved in developing a Web site for the
Internet or an intranet.

Web development can range from developing a simple single static page of
plain text to complex Web-based Internet applications, electronic businesses,
and social network services.

Example 2: what is webworker

web worker
Web Workers are a mechanism to create a separate thread 
in parallel to your main JS program thread. 
can only communicate with each other through normal async events 
always abide by the event-loop one-at-a-time behavior 
required by run-to-completion.