cssauron

build a matching function in CSS for any nested object structure!

var language = require('cssauron')({
    tag: 'tagName'
  , contents: 'innerText'
  , id: 'id'
  , class: 'className'
  , parent: 'parentNode'
  , children: 'childNodes'
  , attr: 'getAttribute(attr)'
})

var selector = language('body > #header .logo')
  , element = document.getElementsByClassName('logo')[0]

if(selector(element)) {
  // element matches selector
} else {
  // element does not match selector
}

API

require('cssauron')(options) -> selector factory

Import cssauron and configure it for the nested object structure you'll want to match against.

options

options are an object hash of lookup type to string attribute or function(node) lookups for queried nodes. You only need to provide the configuration necessary for the selectors you're planning on creating. (If you're not going to use #id lookups, there's no need to provide the id lookup in your options.)

• tag: Extract tag information from a node for div style selectors.
• contents: Extract text information from a node, for :contains(xxx) selectors.
• id: Extract id for #my_sweet_id selectors.
• class: .class_name
• parent: Used to traverse up from the current node, for composite selectors body #wrapper, body > #wrapper.
• children: Used to traverse from a parent to its children for sibling selectors div + span, a ~ p.
• attr: Used to extract attribute information, for [attr=thing] style selectors.

selector_factory('some selector') -> match function

Compiles a matching function.

match(node) -> true or false

Returns true or false depending on whether the provided node matches the selector.

Supported pseudoclasses

:first-child :last-child :empty :root :contains(text)

Supported attribute lookups

[attr=value]: Exact match [attr]: Attribute exists and is not false-y. [attr$=value]: Attribute ends with value [attr^=value]: Attribute starts with value [attr*=value]: Attribute contains value [attr~=value]: Attribute, split by whitespace, contains value. [attr|=value]: Attribute, split by -, contains value.