Alex @ Net

This article will show you how to useJavaScript debugger in Google Chrome browser.

Just to make some fun at weekend: a nice animation that was created with CANVAS tag and JavaScript. Just view source to investigate how it is created. Will post a source with a little more details soon.

JavaScript is a trademark of Sun Microsystems and it was used for technology implemented by Netscape Communications and introduced in the Netscape Communicator Web browser in December 1995.

The first JavaScript language specification, described in ECMA-262 standard, was adopted by the ECMA General Assembly of June 1997 and the “ECMAScript” name means this standard. There are three editions of this standard, known as ES1, ES2 and ES3, and fourth edition is currently under development. The fourth edition is known as JavaScript 2 or ES4 and it describes several very important language enhancements such as classes, packages and namespaces and other features that aid developers in their work. ES4 is expected to be finished by October 2008.

Here is a cross-browser implementation of image rotation. The code uses IE filters and Mozilla/Opera/Safari Canvas object:

In Microsoft JScript file system operations may throw exception with code -2146828218. So there is a challenge for you: write a program that will convert the -2146828218 to hex error number 0x800a0046.

The best solution I've found you can read in comments in two hours.

I like the tips and GreaseMonkey is really the king of all tips in the FireFox. With it you can do anything you want with the page: add tags and behaviors, hide unwanted content, add your own UI elements.

And today I've created a small and nice script that hides an unwanted content on a page. For example, let's imagine that we need to hide content of the ... tag.

My ISP is not as reliable as I want it to be. From time to time it happens that I cannot upload files using FTP, have enormous number of dropped TCP packets or have some other interesting surprise. Of course, there are alternative ISPs but there are reasons to not replace my current with another one.

During looking on "Request time out." produced by famous ping I realized that I need something similar but for Web requests. And I want to check my download speed, and upload, and... Stop. It may be a good idea, it may be bad idea but I want create a nice and simple software that shows me how reliable my internet connection is. I can test other ISPs, show problem to my ISP, etc. And this only requires a few Ajax requests.

The result comes quickly and you now can test it too. http ping does exactly what I need. It does almost the same what ping does: sends the request, receives the response and shows amount of time the request takes. It does it four times and shows report. That's all.

In his recent post Travis Swicegood is talking about the "Fluent API". This kind of API is very popular in scripting languages and I use it during my work with Zend Framework or jQuery projects. Another good example of such technique is Document Object Model API.

This article is for people who spend hours working in browsers. After reading it you will get to know how to improve your productivity by using bookmarklets for creating shortcuts for some of your routine operations.

The "How to display tree with expanded nodes?" question raised on our forum and it seems that there is no easy answer on this question. Here I want to post my investigation and describe my solution on this.