Category: Javascript

Does the “for…in” loop in Javascript loop through the hashtables/elements in the order they are declared? Is there a browser which doesn’t do it in order? The object I wish to use will be declared …

From the Mozilla Developer Network: [1,4,9].map(Math.sqrt) will yield: [1,2,3] Why then does this: [‘1′,’2′,’3’].map(parseInt) yield this: [1, NaN, NaN] I have tested in Firefox 3.0.1 and …

I have a structure like this:

• text1
• text2
• text3

How do I use javascript or jQuery to get the text as an …

Is there a way to test the type of an element in JavaScript? The answer may or may not require the prototype library, however the following setup does make use of the library. function(event) { …

What is the best way to detect if a user leaves a web page? The onunload JavaScript event doesn’t work every time (the HTTP request takes longer than the time required to terminate the browser). …

I want to do this: e.className = t; Where t is the name of a style I have defined in a stylesheet.

When using Google Chrome, I want to debug some JavaScript code. How can I do that?

When working with large and/or many Javascript and CSS files, what’s the best way to reduce the file sizes?