Creating a javascript widget for other sites

Question

I am looking to create a javascript \"widget\" that can be hosted on other sites. For example. I want to host the javascript code on my site:

http://scripts.my

Answer 1

Your script should not interfere with the rest of the page.

• Keep the number of globals to a minimum (one namespace object should be enough)
• Don't add properties to the built-in objects for no reason
• Don't expect to be the only script that listen for events such as window.onload
• If you're using for..in loops keep in mind that other scripts may have added stuff to Array.prototype
• Take style-sheets into consideration. The default style of HTML elements may have been changed.
• Don't update your script without reason as you risk breaking a lot of sites.