JS under the hood

Some notes I took while trying to understand how JS works under the hood.

The snippet of code can be easily executed here: http://jsbin.com/?js,console

Table of contents

• Executions contexts, Lexical environments, scopes
  • Syntax parser
  • Lexical environment
  • Execution context
  • Creation and hoisting
  • Functions invocation and execution stack
  • Variable scope
  • Scope chain
  • Handling asynchronicity
• Types and operator
  • Primitive types
  • Precedence and associativity
  • Coercion
  • Comparison Operators
  • Particular cases of coersion
• Objects and functions
  • Key value pairs: Object
  • Functions
  • By reference Vs by value
  • "This"
  • Arrays
  • Parameters
  • IIFEs
  • Closure
  • Closures and Callbacks
  • call(), apply() and bind()
• OO JS and prototypal Inheritance