Sebastian Riedel > Mojolicious-5.54 > Mojo::DOM::CSS

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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.

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.

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