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 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...

I am using Cesium to visualize my scenario and I want to create a polygon in JavaScript using position of other moving entities as references for its endpoints. As suggested in the answer of this question by using CZML.   I was wondering if I can do...

I'm reading a book called JavaScript patterns but there's one part where I think the guy is confusing.   The guy actually led up in the book to the klass design pattern, where he developed it piece by piece. He first he presents the problem:...