# vs ## vs ###

[General]

As title, what are the differences?

As examples:
#a(href^=http://adserver.com/)
##[class*="GoogleAds"]
###AdCol

I believe ### is redundant. ##ADCol and ###AdCol is the same isn't it?

[Ares2]

# -> simple hiding rule, ABP syntax, with () around attribute selectors
## -> regular css syntax

and # is the id selector in css, so the rule ##[id="AdCol"] can also be written as ###AdCol

[General]

# -> simple hiding rule, ABP syntax, with () around attribute selectors
## -> regular css syntax

and # is the id selector in css, so the rule ##[id="AdCol"] can also be written as ###AdCol

So basically they are all the same
#(id=AdCol)
#*(id=AdCol)
##[id="AdCol"]
##*[id="AdCol"]
###AdCol
##*#AdCol

Which syntax should I use? Which is more efficient or run faster?

Why do we create different syntax (#(id=), ##[id=""], ###id) if they do the same thing?

[Wladimir Palant]

Use this one:

Code: Select all

###AdCol

Or, if you want it a little more readable:

Code: Select all

##*#AdCol

The "simplified" syntax #(id=AdCol) is only kept for backwards compatibility, next version of Element Hiding Helper won't create such filters any more. And handling of [id="AdCol"] in the browser is likely slower than #AdCol (I didn't measure that however).

[General]

Thanks.

This document is very outdated: http://adblockplus.org/en/filters . It is still teaching beginners how to use the old syntax.

Is there any updated document for the CSS-syntax filters?

[Wladimir Palant]

http://adblockplus.org/en/filters#elemhide_css

[General]

http://adblockplus.org/en/filters#elemhide_css

The only thing is to say CSS selector starts with ##.
Everything above is to tell people how to use the outdated ABP syntax. This is why I got confused initially. Some serious updates should be made.

[General]

What CSS version does Adblock Plus support?

[Wladimir Palant]

Adblock Plus doesn't process CSS, Firefox does. Firefox currently supports all CSS2 selectors and some from CSS3.