Learn Greasemonkey

[a.sub]

Hey i want to pick up programming in greasemonkey but chip's link doesnt work for me

[yeti_c]

Go here then...

http://wiki.greasespot.net/Main_Page

C.

[a.sub]

much obliged!

[yeti_c]

No worries.

Feel free to post any queries you have - or any other good learning sites in this thread.

C.

[Dako]

Very good book about Greasemonkey
http://diveintogreasemonkey.org/

It is available online or as PDF or HTML download.

[sherkaner]

I just looked through the book, and it's a bit outdated (as it says on the page you're linking to).

Some updated basics:
- A greasemonkey script is mainly an extra javascript-file that is executed on the page with a few extra limitations and possibilities.
There are enough resources available on javascript, so I won't dive into that (though Douglas Crockford's lectures are a good place to start if you already know how to write programs).
- Extra possibilities include saving information (though this can be done through localStorage these days) and doing cross-site URL requests.

- Small bits of code (for finding a certain element or doing some basic operations) are best to check through the firebug console.
- Best way to debug: actually install the script in chrome, and use the Chrome debugger to set breakpoints and check certain objects.
- second-best way: Install/use firebug in firefox, and use its logger through unsafeWindow.console.log(element). This will show the element/object in the firebug console, which can be used to inspect further.
Unfortunately the debugger in Firebug doesn't work for greasemonkey scripts at the moment.

- The main difference between firefox and chrome scripts: Chrome doesn't allow the script to interfere with scripts on the page in any way.
Greasemonkey does (mainly through unsafewindow), but that is thought to be a bad practice. Chrome also doesn't allow cross-site URL requests, though there are ways around that.

[a.sub]

ill make sure to look into all of this once AP testing is over