This is going to be the first part of a blog post series about javascript widgets.

First type I’m going to cover is Popup Widget. Sometimes it’s called Popin Widget because there is no actually new window that pops up, instead the content is shown IN-side a current page. The idea is quite simple: you provide some html/js snippet to other sites. They put it into relevant place, and you have some functionality of your site running there.

I’m going to explain how exactly it works, what should be done to achieve this, and what common mistakes i see once and again.

At the end of the blog post you will get a link to complete javascript library, grab it, play with it, and use it for fun or profit.