NAME¶

Mojo::DOM::CSS - CSS selector engine

SYNOPSIS¶

  use Mojo::DOM::CSS;
  # Select elements from DOM tree
  my $css = Mojo::DOM::CSS->new(tree => $tree);
  my $elements = $css->select('h1, h2, h3');

DESCRIPTION¶

Mojo::DOM::CSS is the CSS selector engine used by Mojo::DOM and based on Selectors Level 3 <http://www.w3.org/TR/css3-selectors/>.

SELECTORS¶

All CSS selectors that make sense for a standalone parser are supported.

*¶

Any element.

  my $all = $css->select('*');

E¶

An element of type "E".

  my $title = $css->select('title');

E[foo]¶

An "E" element with a "foo" attribute.

  my $links = $css->select('a[href]');

E[foo="bar"]¶

An "E" element whose "foo" attribute value is exactly equal to "bar".

  my $fields = $css->select('input[name="foo"]');

E[foo~="bar"]¶

An "E" element whose "foo" attribute value is a list of whitespace-separated values, one of which is exactly equal to "bar".

  my $fields = $css->select('input[name~="foo"]');

E[foo^="bar"]¶

An "E" element whose "foo" attribute value begins exactly with the string "bar".

  my $fields = $css->select('input[name^="f"]');

E[foo$="bar"]¶

An "E" element whose "foo" attribute value ends exactly with the string "bar".

  my $fields = $css->select('input[name$="o"]');

E[foo*="bar"]¶

An "E" element whose "foo" attribute value contains the substring "bar".

  my $fields = $css->select('input[name*="fo"]');

E:root¶

An "E" element, root of the document.

  my $root = $css->select(':root');

E:checked¶

A user interface element "E" which is checked (for instance a radio-button or checkbox).

  my $input = $css->select(':checked');

E:empty¶

An "E" element that has no children (including text nodes).

  my $empty = $css->select(':empty');

E:nth-child(n)¶

An "E" element, the "n-th" child of its parent.

  my $third = $css->select('div:nth-child(3)');
  my $odd   = $css->select('div:nth-child(odd)');
  my $even  = $css->select('div:nth-child(even)');
  my $top3  = $css->select('div:nth-child(-n+3)');

E:nth-last-child(n)¶

An "E" element, the "n-th" child of its parent, counting from the last one.

  my $third    = $css->select('div:nth-last-child(3)');
  my $odd      = $css->select('div:nth-last-child(odd)');
  my $even     = $css->select('div:nth-last-child(even)');
  my $bottom3  = $css->select('div:nth-last-child(-n+3)');

E:nth-of-type(n)¶

An "E" element, the "n-th" sibling of its type.

  my $third = $css->select('div:nth-of-type(3)');
  my $odd   = $css->select('div:nth-of-type(odd)');
  my $even  = $css->select('div:nth-of-type(even)');
  my $top3  = $css->select('div:nth-of-type(-n+3)');

E:nth-last-of-type(n)¶

An "E" element, the "n-th" sibling of its type, counting from the last one.

  my $third    = $css->select('div:nth-last-of-type(3)');
  my $odd      = $css->select('div:nth-last-of-type(odd)');
  my $even     = $css->select('div:nth-last-of-type(even)');
  my $bottom3  = $css->select('div:nth-last-of-type(-n+3)');

E:first-child¶

An "E" element, first child of its parent.

  my $first = $css->select('div p:first-child');

E:last-child¶

An "E" element, last child of its parent.

  my $last = $css->select('div p:last-child');

E:first-of-type¶

An "E" element, first sibling of its type.

  my $first = $css->select('div p:first-of-type');

E:last-of-type¶

An "E" element, last sibling of its type.

  my $last = $css->select('div p:last-of-type');

E:only-child¶

An "E" element, only child of its parent.

  my $lonely = $css->select('div p:only-child');

E:only-of-type¶

An "E" element, only sibling of its type.

  my $lonely = $css->select('div p:only-of-type');

E.warning¶

An "E" element whose class is "warning".

  my $warning = $css->select('div.warning');

E#myid¶

An "E" element with "ID" equal to "myid".

  my $foo = $css->select('div#foo');

E:not(s)¶

An "E" element that does not match simple selector "s".

  my $others = $css->select('div p:not(:first-child)');

E F¶

An "F" element descendant of an "E" element.

  my $headlines = $css->select('div h1');

E > F¶

An "F" element child of an "E" element.

  my $headlines = $css->select('html > body > div > h1');

E + F¶

An "F" element immediately preceded by an "E" element.

  my $second = $css->select('h1 + h2');

E ~ F¶

An "F" element preceded by an "E" element.

  my $second = $css->select('h1 ~ h2');

E, F, G¶

Elements of type "E", "F" and "G".

  my $headlines = $css->select('h1, h2, h3');

E[foo=bar][bar=baz]¶

An "E" element whose attributes match all following attribute selectors.

  my $links = $css->select('a[foo^=b][foo$=ar]');

ATTRIBUTES¶

Mojo::DOM::CSS implements the following attributes.

tree¶

  my $tree = $css->tree;
  $css     = $css->tree(['root']);

Document Object Model. Note that this structure should only be used very carefully since it is very dynamic.

METHODS¶

Mojo::DOM::CSS inherits all methods from Mojo::Base and implements the following new ones.

match¶

  my $bool = $css->match('head > title');

Match CSS selector against first node in "tree".

select¶

  my $results = $css->select('head > title');

Run CSS selector against "tree".

select_one¶

  my $result = $css->select_one('head > title');

Run CSS selector against "tree" and stop as soon as the first node matched.

SEE ALSO¶

Mojolicious, Mojolicious::Guides, <http://mojolicio.us>.