Notes

Notes

Javascript:
  * delegate = event handler
  
  
CSS:
  * Pseduo class: to define a special state of an element.
  * Pseduo element: to style specified parts of an element.
  
  * "height" is the vertical measurement of the container.
     Note: The height property does not include padding, borders, or margins; it sets the height of the area inside the padding, border, and margin of the element!
     Note: The min-height and max-height properties override height.
  * "line-height" is the distance from the top of the first line of text to the top of the second.
  
  
HTTP (all of the followings use the same TCP pipe):
  * http/1.0: one request -> one response back and forth
  * http/1.1: request pipelining with FIFO (restriction: responses need to be in the same order that requests get received)
  * SPDY: request pipelining without FIFO (restriction: communicates separately with each host which means can only download things from one host at a time)
  * http/2: Solve all restrictions above.