All Annotations of Javascript Closures[Preview]

saved by41 people, first bySérgio Carvalho on 2006-03-02, last byarpit mathur on 2008-08-10

• Closure

  
  

  A "closure" is an expression (typically a function) that
  can have free variables together with an environment that binds
  those variables (that "closes" the expression).
• Closures are one of the most powerful features of ECMAScript
  (javascript) but they cannot be property exploited without
  understanding them
• The simple explanation of a Closure is that ECMAScript allows inner
  functions; function definitions and function expressions that are
  inside the function bodes of other functions. And that those inner
  functions are allowed access to all of the local variables, parameters
  and declared inner functions within their outer function(s).

• Function objects created with the Function constructor
  always have a [[scope]] property referring to a scope
  chain that only contains the global object.
  

  
  
  

  
  Function objects created with function declarations or function
  expressions have the scope chain of the execution context in which
  they are created assigned to their internal [[scope]]
  property.
  

• Example 2: Associating Functions with Object Instance Methods

• on 2006-07-25 Aka_tazzo
  e anything, so
• on 2006-08-21 Tomwright
  An extended discussion of closures with some examples
• on 2006-11-16 Wildoats
  excellent