JS

JS

1. Keyword: with(){}, closure, prototype, Infinity, undefined, null, NaN, Associative Arrays,... (see note)

   • - Associative Arrays - Array Javascript vs Array PHP. - Undefined vs Null vs NaN - Difference between javascript property and javascript variable - What is the purpose of the var keyword and when should I use it (or omit it)?  
   • Value vs. Reference in Javascript

2. Operators

   • Unary operators
     • delete, new, abc = + x, void, typeof,... 
   • Comma operator
   • Bitwise operator
   • Other
     • Assignment operators Comparison operators Arithmetic operators Bitwise operators Logical operators String operators Conditional (ternary) operator Comma operator Unary operators Relational operators
   • Grouping operator (...)
   • Spread syntax (Three dots)

3. Statement

   • break, continue, label

4. Function

   • Statements function declaration
   • Operators function expression
   • other note
     • var a = function() { return {name:"abc"} };
       • var a = function() {      return {name:"abc"}; }; a.name = "abc2"; // OUTPUT --------------- // a() = function run. // a().name = "abc". // a.name2 = "abc2". 
     • Function expressions in JavaScript are not hoisted, unlike function declarations.
     • eval()
     • Arguments object
     • Rest parameters (Three dots)
   • Function constructor