This question already has an answer here:                           JavaScript closure inside loops – simple practical example                                      43 answers                                     I've got the foll...
How can I create static variables in Javascript?...
Using instance methods as callbacks for event handlers changes the scope of this from "My instance" to "Whatever just called the callback". So my code looks like this  function MyObject() {   this.doSomething = function() {     ......
I understand that every function in JavaScript is a first-class object and it has an internal property [[scope]] which hosts the binding records of the function's free variables. However, there are two special cases.   Is the function created b...
Closures in a loop are causing me problems. I think I have to make another function that returns a function to solve the problem, but I can't get it to work with my jQuery code.  Here is the basic problem in a simplified form:  function foo(val...
I'm not sure whether or when it is useful (to improve performance) to dereference variables.  var x = a.b.c.d[some_key].f; while (loop) {     do_something_with(x); }   seems to be better than  while (loop) {     do_somthing_with(a.b.c.d[some_ke...
I'm reading the Mozilla developer's site on closures, and I noticed in their example for common mistakes, they had this code:  <p id="help">Helpful notes will appear here</p>   <p>E-mail: <input type="text&#...
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