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In Hpricot, all of the following selectors are supported:

  • * any element
  • E an element of type E
  • E:root an E element, root of the document
  • E:nth-child(n) an E element, the n-th child of its parent
  • E:nth-last-child(n) an E element, the n-th child of its parent, * counting from the last one
  • E:nth-of-type(n) an E element, the n-th sibling of its type
  • E:nth-last-of-type(n) an E element, the n-th sibling of its type, counting from the last one
  • E:first-child an E element, first child of its parent
  • E:last-child an E element, last child of its parent
  • E:first-of-type an E element, first sibling of its type
  • E:last-of-type an E element, last sibling of its type
  • E:only-child an E element, only child of its parent
  • E:only-of-type an E element, only sibling of its type
  • E:empty an E element that has no children (including text nodes)
  • E:lang(fr) an element of type E in language “fr”
  • E:enabled
  • E:disabled a user interface element E which is enabled or disabled
  • E:checked a user interface element E which is checked (for instance a radio-button or checkbox)
  • E.warning an E element whose class is “warning”
  • E#myid an E element with ID equal to “myid”.
  • E:not(s) an E element that does not match simple selector s
  • E F an F element descendant of an E element
  • E > F an F element child of an E element
  • E + F an F element immediately preceded by an E element
  • E ~ F an F element preceded by an E element

Supported, but different

All attribute selectors are written like their XPath counter-parts (in that all attributes should begin with an @ symbol).

  • E[@foo] an E element with a “foo” attribute
  • E[@foo=“bar”] an E element whose “foo” attribute value is exactly equal to “bar”
  • E[@foo~=“bar”] an E element whose “foo” attribute value is a list of space-separated values, one of which is exactly equal to “bar”
  • E[@foo^=“bar”] an E element whose “foo” attribute value begins exactly with the string “bar”
  • E[@foo$=“bar”] an E element whose “foo” attribute value ends exactly with the string “bar”
  • E[@foo*=“bar”] an E element whose “foo” attribute value contains the substring “bar”
  • E[@hreflang|=“en”] an E element whose “hreflang” attribute has a hyphen-separated list of values beginning (from the left) with “en”

Not supported

Hpricot only support selectors that actually select DOM elements – everything else is ignored.

  • E:link
  • E:visited an E element being the source anchor of a hyperlink of which the target is not yet visited (:link) or already visited (:visited)
  • E:active
  • E:hover
  • E:focus an E element during certain user actions
  • E:target an E element being the target of the referring URI
  • E::first-line the first formatted line of an E element
  • E::first-letter the first formatted letter of an E element
  • E::selection the portion of an E element that is currently selected/highlighted by the user
  • E::before generated content before an E element
  • E::after generated content after an E element
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