Marcus Ramberg > Mojolicious-4.60 > Mojo::DOM

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NAME ^

Mojo::DOM - Minimalistic HTML/XML DOM parser with CSS selectors

SYNOPSIS ^

  use Mojo::DOM;

  # Parse
  my $dom = Mojo::DOM->new('<div><p id="a">A</p><p id="b">B</p></div>');

  # Find
  say $dom->at('#b')->text;
  say $dom->find('p')->text;
  say $dom->find('[id]')->attr('id');

  # Walk
  say $dom->div->p->[0]->text;
  say $dom->div->children('p')->first->{id};

  # Iterate
  $dom->find('p[id]')->each(sub { say shift->{id} });

  # Loop
  for my $e ($dom->find('p[id]')->each) {
    say $e->text;
  }

  # Modify
  $dom->div->p->[1]->append('<p id="c">C</p>');
  $dom->find(':not(p)')->strip;

  # Render
  say "$dom";

DESCRIPTION ^

Mojo::DOM is a minimalistic and relaxed HTML/XML DOM parser with CSS selector support. It will even try to interpret broken XML, so you should not use it for validation.

CASE SENSITIVITY ^

Mojo::DOM defaults to HTML semantics, that means all tags and attributes are lowercased and selectors need to be lowercase as well.

  my $dom = Mojo::DOM->new('<P ID="greeting">Hi!</P>');
  say $dom->at('p')->text;
  say $dom->p->{id};

If XML processing instructions are found, the parser will automatically switch into XML mode and everything becomes case sensitive.

  my $dom = Mojo::DOM->new('<?xml version="1.0"?><P ID="greeting">Hi!</P>');
  say $dom->at('P')->text;
  say $dom->P->{ID};

XML detection can also be disabled with the "xml" method.

  # Force XML semantics
  $dom->xml(1);

  # Force HTML semantics
  $dom->xml(0);

METHODS ^

Mojo::DOM implements the following methods.

new

  my $dom = Mojo::DOM->new;
  my $dom = Mojo::DOM->new('<foo bar="baz">test</foo>');

Construct a new array-based Mojo::DOM object and "parse" HTML/XML fragment if necessary.

all_text

  my $trimmed   = $dom->all_text;
  my $untrimmed = $dom->all_text(0);

Extract all text content from DOM structure, smart whitespace trimming is enabled by default.

  # "foo bar baz"
  $dom->parse("<div>foo\n<p>bar</p>baz\n</div>")->div->all_text;

  # "foo\nbarbaz\n"
  $dom->parse("<div>foo\n<p>bar</p>baz\n</div>")->div->all_text(0);

ancestors

  my $collection = $dom->ancestors;
  my $collection = $dom->ancestors('div');

Find all ancestors of this element matching the CSS selector and return a Mojo::Collection object containing these elements as Mojo::DOM objects. All selectors from Mojo::DOM::CSS are supported.

  # List types of ancestor elements
  say $dom->ancestors->type;

append

  $dom = $dom->append('<p>Hi!</p>');

Append HTML/XML fragment to element.

  # "<div><h1>A</h1><h2>B</h2></div>"
  $dom->parse('<div><h1>A</h1></div>')->at('h1')->append('<h2>B</h2>')->root;

append_content

  $dom = $dom->append_content('<p>Hi!</p>');

Append HTML/XML fragment to element content.

  # "<div><h1>AB</h1></div>"
  $dom->parse('<div><h1>A</h1></div>')->at('h1')->append_content('B')->root;

at

  my $result = $dom->at('html title');

Find first element matching the CSS selector and return it as a Mojo::DOM object or return undef if none could be found. All selectors from Mojo::DOM::CSS are supported.

  # Find first element with "svg" namespace definition
  my $namespace = $dom->at('[xmlns\:svg]')->{'xmlns:svg'};

attr

  my $attrs = $dom->attr;
  my $foo   = $dom->attr('foo');
  $dom      = $dom->attr({foo => 'bar'});
  $dom      = $dom->attr(foo => 'bar');

Element attributes.

  # List id attributes
  say $dom->find('*')->attr('id')->compact;

children

  my $collection = $dom->children;
  my $collection = $dom->children('div');

Find all children of this element matching the CSS selector and return a Mojo::Collection object containing these elements as Mojo::DOM objects. All selectors from Mojo::DOM::CSS are supported.

  # Show type of random child element
  say $dom->children->shuffle->first->type;

content_xml

  my $xml = $dom->content_xml;

Render content of this element to XML.

  # "<b>test</b>"
  $dom->parse('<div><b>test</b></div>')->div->content_xml;

find

  my $collection = $dom->find('html title');

Find all elements matching the CSS selector and return a Mojo::Collection object containing these elements as Mojo::DOM objects. All selectors from Mojo::DOM::CSS are supported.

  # Find a specific element and extract information
  my $id = $dom->find('div')->[23]{id};

  # Extract information from multiple elements
  my @headers = $dom->find('h1, h2, h3')->text->each;
  my @links   = $dom->find('a[href]')->attr('href')->each;

match

  my $result = $dom->match('html title');

Match the CSS selector against this element and return it as a Mojo::DOM object or return undef if it didn't match. All selectors from Mojo::DOM::CSS are supported.

namespace

  my $namespace = $dom->namespace;

Find element namespace.

  # Find namespace for an element with namespace prefix
  my $namespace = $dom->at('svg > svg\:circle')->namespace;

  # Find namespace for an element that may or may not have a namespace prefix
  my $namespace = $dom->at('svg > circle')->namespace;

next

  my $sibling = $dom->next;

Return Mojo::DOM object for next sibling of element or undef if there are no more siblings.

  # "<h2>B</h2>"
  $dom->parse('<div><h1>A</h1><h2>B</h2></div>')->at('h1')->next;

parent

  my $parent = $dom->parent;

Return Mojo::DOM object for parent of element or undef if this element has no parent.

parse

  $dom = $dom->parse('<foo bar="baz">test</foo>');

Parse HTML/XML fragment with Mojo::DOM::HTML.

  # Parse XML
  my $dom = Mojo::DOM->new->xml(1)->parse($xml);

prepend

  $dom = $dom->prepend('<p>Hi!</p>');

Prepend HTML/XML fragment to element.

  # "<div><h1>A</h1><h2>B</h2></div>"
  $dom->parse('<div><h2>B</h2></div>')->at('h2')->prepend('<h1>A</h1>')->root;

prepend_content

  $dom = $dom->prepend_content('<p>Hi!</p>');

Prepend HTML/XML fragment to element content.

  # "<div><h2>AB</h2></div>"
  $dom->parse('<div><h2>B</h2></div>')->at('h2')->prepend_content('A')->root;

previous

  my $sibling = $dom->previous;

Return Mojo::DOM object for previous sibling of element or undef if there are no more siblings.

  # "<h1>A</h1>"
  $dom->parse('<div><h1>A</h1><h2>B</h2></div>')->at('h2')->previous;

remove

  my $parent = $dom->remove;

Remove element and return Mojo::DOM object for parent of element.

  # "<div></div>"
  $dom->parse('<div><h1>A</h1></div>')->at('h1')->remove;

replace

  my $parent = $dom->replace('<div>test</div>');

Replace element with HTML/XML fragment and return Mojo::DOM object for parent of element.

  # "<div><h2>B</h2></div>"
  $dom->parse('<div><h1>A</h1></div>')->at('h1')->replace('<h2>B</h2>');

  # "<div></div>"
  $dom->parse('<div><h1>A</h1></div>')->at('h1')->replace('');

replace_content

  $dom = $dom->replace_content('<p>test</p>');

Replace element content with HTML/XML fragment.

  # "<div><h1>B</h1></div>"
  $dom->parse('<div><h1>A</h1></div>')->at('h1')->replace_content('B')->root;

  # "<div><h1></h1></div>"
  $dom->parse('<div><h1>A</h1></div>')->at('h1')->replace_content('')->root;

root

  my $root = $dom->root;

Return Mojo::DOM object for root node.

siblings

  my $collection = $dom->siblings;
  my $collection = $dom->siblings('div');

Find all siblings of this element matching the CSS selector and return a Mojo::Collection object containing these elements as Mojo::DOM objects. All selectors from Mojo::DOM::CSS are supported.

  # List types of sibling elements
  say $dom->siblings->type;

strip

  my $parent = $dom->strip;

Remove element while preserving its content and return Mojo::DOM object for parent of element.

  # "<div>A</div>"
  $dom->parse('<div><h1>A</h1></div>')->at('h1')->strip;

tap

  $dom = $dom->tap(sub {...});

Alias for "tap" in Mojo::Base.

text

  my $trimmed   = $dom->text;
  my $untrimmed = $dom->text(0);

Extract text content from element only (not including child elements), smart whitespace trimming is enabled by default.

  # "foo baz"
  $dom->parse("<div>foo\n<p>bar</p>baz\n</div>")->div->text;

  # "foo\nbaz\n"
  $dom->parse("<div>foo\n<p>bar</p>baz\n</div>")->div->text(0);

text_after

  my $trimmed   = $dom->text_after;
  my $untrimmed = $dom->text_after(0);

Extract text content immediately following element, smart whitespace trimming is enabled by default.

  # "baz"
  $dom->parse("<div>foo\n<p>bar</p>baz\n</div>")->div->p->text_after;

  # "baz\n"
  $dom->parse("<div>foo\n<p>bar</p>baz\n</div>")->div->p->text_after(0);

text_before

  my $trimmed   = $dom->text_before;
  my $untrimmed = $dom->text_before(0);

Extract text content immediately preceding element, smart whitespace trimming is enabled by default.

  # "foo"
  $dom->parse("<div>foo\n<p>bar</p>baz\n</div>")->div->p->text_before;

  # "foo\n"
  $dom->parse("<div>foo\n<p>bar</p>baz\n</div>")->div->p->text_before(0);

to_xml

  my $xml = $dom->to_xml;
  my $xml = "$dom";

Render this element and its content to XML.

  # "<b>test</b>"
  $dom->parse('<div><b>test</b></div>')->div->b->to_xml;

tree

  my $tree = $dom->tree;
  $dom     = $dom->tree(['root', ['text', 'foo']]);

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

type

  my $type = $dom->type;
  $dom     = $dom->type('div');

Element type.

  # List types of child elements
  say $dom->children->type;

xml

  my $bool = $dom->xml;
  $dom     = $dom->xml($bool);

Disable HTML semantics in parser and activate case sensitivity, defaults to auto detection based on processing instructions.

CHILD ELEMENTS ^

In addition to the methods above, many child elements are also automatically available as object methods, which return a Mojo::DOM or Mojo::Collection object, depending on number of children.

  say $dom->p->text;
  say $dom->div->[23]->text;
  say $dom->div->text;

ELEMENT ATTRIBUTES ^

Direct hash reference access to element attributes is also possible.

  say $dom->{foo};
  say $dom->div->{id};

SEE ALSO ^

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

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