Data.HTML.Selector provides CSS style tag selector, enabling quick information filtering and extracting. I didn't know a lot about CSS selectors when I was writing this module. So this module is a little too easy.

data Selector = Selector {
    tagS::[String],
    clsS::[String],
    idS::[String]
} deriving Show

This is the selector, including tag name selector, class selector and id selector. However, it doesn't support selecting by attributes.

createSelector::String->Selector

create a selector by a CSS style selector string

applySelector::Selector->Tag->[Tag]

apply a selector to a tag, and return the children tags of that tag which match the condition

select::String->Tag->[Tag]

directly apply a string-typed selector to a tag

findByTag::String->Tag->[Tag]

find the children tags of a specific tag by its tag name

findById::String->Tag->[Tag]

find the children tags of a specific tag by its id

findByClass::String->Tag->[Tag]

find the children tags of a specific tag by its class

(||>)::[Tag]->Selector->[Tag]

This operator works as a pipe filter. You can feed a list of tags to a selector, and the returned value is still a list of tags. So you can feed the results to another selector. Like: tags ||> selector1 ||> selector2, the result is the tags filtered by both selector1 and selector2.

(|>>)::[Tag]->Selector->[Tag]

Similar to (||>), except that it also searches for the children tags of the listed tags, while (||>) only searches the direct tags in the list, not their children.