It misses some things:

1) prototype

2) constructor

3) prompt

4) debugger statement i.e. this is must for anyone who want to put breakpoints in code

But this is really short and sweet 1 page Core JS summary for people who want to write their own libraries

(function(){

  var myLib = {}

  myLib.prototype={

  method1: function(){ xx;yy;zz}, 

  method2: function(){ xx;yy;zz}, 

  variable1: 'value1' 

}

)()