Getting started with HTML5, CSS3 and JavaScript

[Source] This blog post describes the resources I am using to get started with HTML5, CSS3 and JavaScript and to learn for the Microsoft Certification. I will be updating this post as I advance in my preparation. Read Dive Into HTML5 Eloquent JavaScript W3C - World Wide Web Consortium Standards HTML5 specification WHATWG community Web Hypertext Application Technology (WHAT) Specifications … Continue reading Getting started with HTML5, CSS3 and JavaScript →

JavaScript error: $ is undefined

This error comes when the jQuery library was not referenced or not loaded at all or not loaded properly. Solution: Add script reference to the jQuery library in your html file: you can download it and add it into your project or reference it from CDN. The order of your referenced scripts is important: make … Continue reading JavaScript error: $ is undefined →

jQuery Proven Performance Tips And Tricks (Slides) by Addy Osmani

„Apps should be snappy, not sloppy”, that’s what Addy Osmani writes. Also how true is this: “Best practices offer optimal approaches to solving problems. If we don’t follow them, browsers can end up having to do more work, which means more memory use and slower apps.” A part of the steps we should take in … Continue reading jQuery Proven Performance Tips And Tricks (Slides) by Addy Osmani →

JavaScript naming conventions and coding guidelines

I’ve recognized that I’m sometimes not following the general rules when writing JavaScript code. *ashamed* For example: - Using a lot of C# conventions, which are wrong in JS, - Putting accidentally variables and functions in the global scope, - Pascal and Camel casing is mixedly used for naming variables and functions all over our … Continue reading JavaScript naming conventions and coding guidelines →

HOW TO: check if callbacks are running

Today I was struggling with a nasty bug. The functionality is pretty basic: we attach an onchange event handler on several textboxes in which we do a callback with $.ajax. During the callback, we make some calculations on the server-side and when the callback comes back successfully, we update the textboxes with the new values. … Continue reading HOW TO: check if callbacks are running →