This question already has answers here:...

Best reference sites for HTML and JavaScript programming:   W3C WebEd Wiki (this site has a self-teaching curriculum as well as reference material): HTML, CSS W3C Specifications: HTML4, HTML5 (working draft), CSS 2.1, DOM Tech Reports: levels 1-3 EC...

Sometimes you have strings that must fit within a certain pixel width. This function attempts to do so efficiently. Please post your suggestions or refactorings below :)  function fitStringToSize(str,len) {     var shortStr = str;     var f = documen...

How to get reference count for an object   Is it possible to determine if a javascript object has multiple references to it?  Or if it has references besides the one I'm accessing it with?  Or even just to get the reference count itself? Can I fi...

I tried to search for a JavaScript reference, but there's none available. The best two suggested sources are MDN (Mozilla Developer Network) and W3Schools.  Why?...

I understand that in javascript, primitives are passed by value and objects are passed by reference.  I'm interested in creating a workaround of some kind that would let me get a reference to an object property containing a primitive. For example...

I have a prototype object in Javascript, when I initialise a new instance of the prototype and update properties in the prototype, it updates for all elements. I understand that arrays and objects are passed by reference and was wondering of a soluti...

In the following javascript code:  function foo() {   foo.val =  foo.val || 'no val';   return 'foo has ' + foo.val; }; function bar() {   bar.val =  bar.val || 'no val';   return 'bar has ' + bar.val; }; var a = foo;...

At first I thought arr.slice(0) was doing a deep unreferenced copy, but it is actually doing just a shallow unreferenced copy, so if the array contains nested arrays, they are still referenced:  var a = [1,2] var b = [3,4] var c = [a,b] var d = c.sli...

I know this works, but I don't know why or the reasoning behind why it was made to work this way:  var foo = [5, 10]; var bar = foo; console.log(foo); //[5, 10] console.log(bar); //[5, 10] bar[0] = 1;  console.log(foo); //[1, 10] bar = null; cons...