From time to time, I receive emails from desperate people who want help with their javascript problem. I also receive a lot of emails of people wanting to help me with my “manly problems”. It’s very nice from them to care about me and I take time to reply to each of them but I […]

Since I have written Ajax and javascript don’t use thread, one of my reader (BK) told me that I was wrong. Here’s the final truth.
What I said
If javascript runs some code that takes 5 seconds to execute and an ajax response arrives at 2 seconds, it will take 3 seconds before it will be executed […]

Since the beginning of Ask Dan a javascript question, I received a bunch of questions. Here’s the first one I received. It’s from Andrew Worcester.
There seems (to me anyway) to be an overuse of the “new” syntax in libraries. If I create an Ajax object is there a functional benefit to using: “new Ajax.Request(options)” verses […]

Since ajax, a lot of people are thinking that asynchrone means “in a separated thread”. They are wrong!
Synchronous
The XMLHttpRequest object gives you the option to make a synchronous request to a server with the parameter async set to false. It means that when you call the server, all javascript executions will stop and wait for […]

These days, you can’t write a web application without using one of the billionth javascript library. Two of them stood out of the crowd : prototype and jQuery. I will explain why did I choose jQuery.
Prototype
Prototype is comfortably installed in a lot of developers mind because of two reasons : it was […]

Web2.0 came with the intensive use of the XMLHttpRequest object even if it was already in our browser before then. A lot of format were tried but JSON will be the winner overall.
What is JSON?
JSON is a format for communication between the server-side (PHP, ASP.NET, …) and the client-side (javascript). The magic of it is […]