What are the exact circumstances for which a return statement in Javascript can return a value other than this when a constructor is invoked using the new keyword?  Example:  function Foo () {   return something; }  var foo = new Foo ();   If I'...
I have been trying to add onclick event to new elements I added with JavaScript.  The problem is when I check document.body.innerHTML I can actually see the onclick=alert('blah') is added to the new element.  But when I click that element I...
The following JavaScript code is very confusing to me. Could anyone help me understand. Why does PersonY not have prototype property.  PersonX = function(){}; PersonY = new function(){}; alert(PersonX.prototype); alert(PersonY.prototype);     ?...
Please help me to understand why the following code works:  <script>     var re = RegExp('\\ba\\b') ;     alert(re.test('a')) ;     alert(re.test('ab')) ; </script>   In the first line there is no new operator....
I am curious as what else the new keyword does in the background apart from changing what the this scope refers too.  For example if we compare using the new keyword to make a function set properties and methods on an object to just making a function...
In JavaScript, what's the difference between  var x = Object();   and  var x = new Object();   ?...
Here's the problem, which only occurs in Internet Explorer (IE).  I have a page that has links to several different types of files.  Links from these files execute a Javascript function that opens a new window and loads the specific file.  This w...
Typically, in a constructor function, the object that is bound to this within the function is returned by it when it is called with the new prefix.  But I would imagine that it's also possible (I think I even read this in crockford's book) to...
In the middle of Mozilla documentation page it switches (without clear enough explanation) examples from  WorkerBee.prototype = Object.create(Employee.prototype);   to   WorkerBee.prototype = new Employee;   Second form new Employee will initialize p...

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