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.\" ========================================================================
.\"
.IX Title "Mojo::DOM::CSS 3pm"
.TH Mojo::DOM::CSS 3pm "2014-08-19" "perl v5.20.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Mojo::DOM::CSS \- CSS selector engine
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& use Mojo::DOM::CSS;
\&
\& # Select elements from DOM tree
\& my $css = Mojo::DOM::CSS\->new(tree => $tree);
\& my $elements = $css\->select(\*(Aqh1, h2, h3\*(Aq);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Mojo::DOM::CSS is the \s-1CSS\s0 selector engine used by Mojo::DOM and based on
Selectors Level 3 .
.SH "SELECTORS"
.IX Header "SELECTORS"
All \s-1CSS\s0 selectors that make sense for a standalone parser are supported.
.SS "*"
.IX Subsection "*"
Any element.
.PP
.Vb 1
\& my $all = $css\->select(\*(Aq*\*(Aq);
.Ve
.SS "E"
.IX Subsection "E"
An element of type \f(CW\*(C`E\*(C'\fR.
.PP
.Vb 1
\& my $title = $css\->select(\*(Aqtitle\*(Aq);
.Ve
.SS "E[foo]"
.IX Subsection "E[foo]"
An \f(CW\*(C`E\*(C'\fR element with a \f(CW\*(C`foo\*(C'\fR attribute.
.PP
.Vb 1
\& my $links = $css\->select(\*(Aqa[href]\*(Aq);
.Ve
.ie n .SS "E[foo=""bar""]"
.el .SS "E[foo=``bar'']"
.IX Subsection "E[foo=bar]"
An \f(CW\*(C`E\*(C'\fR element whose \f(CW\*(C`foo\*(C'\fR attribute value is exactly equal to \f(CW\*(C`bar\*(C'\fR.
.PP
.Vb 1
\& my $fields = $css\->select(\*(Aqinput[name="foo"]\*(Aq);
.Ve
.ie n .SS "E[foo~=""bar""]"
.el .SS "E[foo~=``bar'']"
.IX Subsection "E[foo~=bar]"
An \f(CW\*(C`E\*(C'\fR element whose \f(CW\*(C`foo\*(C'\fR attribute value is a list of
whitespace-separated values, one of which is exactly equal to \f(CW\*(C`bar\*(C'\fR.
.PP
.Vb 1
\& my $fields = $css\->select(\*(Aqinput[name~="foo"]\*(Aq);
.Ve
.ie n .SS "E[foo^=""bar""]"
.el .SS "E[foo^=``bar'']"
.IX Subsection "E[foo^=bar]"
An \f(CW\*(C`E\*(C'\fR element whose \f(CW\*(C`foo\*(C'\fR attribute value begins exactly with the string
\&\f(CW\*(C`bar\*(C'\fR.
.PP
.Vb 1
\& my $fields = $css\->select(\*(Aqinput[name^="f"]\*(Aq);
.Ve
.ie n .SS "E[foo$=""bar""]"
.el .SS "E[foo$=``bar'']"
.IX Subsection "E[foo$=bar]"
An \f(CW\*(C`E\*(C'\fR element whose \f(CW\*(C`foo\*(C'\fR attribute value ends exactly with the string
\&\f(CW\*(C`bar\*(C'\fR.
.PP
.Vb 1
\& my $fields = $css\->select(\*(Aqinput[name$="o"]\*(Aq);
.Ve
.ie n .SS "E[foo*=""bar""]"
.el .SS "E[foo*=``bar'']"
.IX Subsection "E[foo*=bar]"
An \f(CW\*(C`E\*(C'\fR element whose \f(CW\*(C`foo\*(C'\fR attribute value contains the substring \f(CW\*(C`bar\*(C'\fR.
.PP
.Vb 1
\& my $fields = $css\->select(\*(Aqinput[name*="fo"]\*(Aq);
.Ve
.SS "E:root"
.IX Subsection "E:root"
An \f(CW\*(C`E\*(C'\fR element, root of the document.
.PP
.Vb 1
\& my $root = $css\->select(\*(Aq:root\*(Aq);
.Ve
.SS "E:checked"
.IX Subsection "E:checked"
A user interface element \f(CW\*(C`E\*(C'\fR which is checked (for instance a radio-button or
checkbox).
.PP
.Vb 1
\& my $input = $css\->select(\*(Aq:checked\*(Aq);
.Ve
.SS "E:empty"
.IX Subsection "E:empty"
An \f(CW\*(C`E\*(C'\fR element that has no children (including text nodes).
.PP
.Vb 1
\& my $empty = $css\->select(\*(Aq:empty\*(Aq);
.Ve
.SS "E:nth\-child(n)"
.IX Subsection "E:nth-child(n)"
An \f(CW\*(C`E\*(C'\fR element, the \f(CW\*(C`n\-th\*(C'\fR child of its parent.
.PP
.Vb 4
\& my $third = $css\->select(\*(Aqdiv:nth\-child(3)\*(Aq);
\& my $odd = $css\->select(\*(Aqdiv:nth\-child(odd)\*(Aq);
\& my $even = $css\->select(\*(Aqdiv:nth\-child(even)\*(Aq);
\& my $top3 = $css\->select(\*(Aqdiv:nth\-child(\-n+3)\*(Aq);
.Ve
.SS "E:nth\-last\-child(n)"
.IX Subsection "E:nth-last-child(n)"
An \f(CW\*(C`E\*(C'\fR element, the \f(CW\*(C`n\-th\*(C'\fR child of its parent, counting from the last one.
.PP
.Vb 4
\& my $third = $css\->select(\*(Aqdiv:nth\-last\-child(3)\*(Aq);
\& my $odd = $css\->select(\*(Aqdiv:nth\-last\-child(odd)\*(Aq);
\& my $even = $css\->select(\*(Aqdiv:nth\-last\-child(even)\*(Aq);
\& my $bottom3 = $css\->select(\*(Aqdiv:nth\-last\-child(\-n+3)\*(Aq);
.Ve
.SS "E:nth\-of\-type(n)"
.IX Subsection "E:nth-of-type(n)"
An \f(CW\*(C`E\*(C'\fR element, the \f(CW\*(C`n\-th\*(C'\fR sibling of its type.
.PP
.Vb 4
\& my $third = $css\->select(\*(Aqdiv:nth\-of\-type(3)\*(Aq);
\& my $odd = $css\->select(\*(Aqdiv:nth\-of\-type(odd)\*(Aq);
\& my $even = $css\->select(\*(Aqdiv:nth\-of\-type(even)\*(Aq);
\& my $top3 = $css\->select(\*(Aqdiv:nth\-of\-type(\-n+3)\*(Aq);
.Ve
.SS "E:nth\-last\-of\-type(n)"
.IX Subsection "E:nth-last-of-type(n)"
An \f(CW\*(C`E\*(C'\fR element, the \f(CW\*(C`n\-th\*(C'\fR sibling of its type, counting from the last one.
.PP
.Vb 4
\& my $third = $css\->select(\*(Aqdiv:nth\-last\-of\-type(3)\*(Aq);
\& my $odd = $css\->select(\*(Aqdiv:nth\-last\-of\-type(odd)\*(Aq);
\& my $even = $css\->select(\*(Aqdiv:nth\-last\-of\-type(even)\*(Aq);
\& my $bottom3 = $css\->select(\*(Aqdiv:nth\-last\-of\-type(\-n+3)\*(Aq);
.Ve
.SS "E:first\-child"
.IX Subsection "E:first-child"
An \f(CW\*(C`E\*(C'\fR element, first child of its parent.
.PP
.Vb 1
\& my $first = $css\->select(\*(Aqdiv p:first\-child\*(Aq);
.Ve
.SS "E:last\-child"
.IX Subsection "E:last-child"
An \f(CW\*(C`E\*(C'\fR element, last child of its parent.
.PP
.Vb 1
\& my $last = $css\->select(\*(Aqdiv p:last\-child\*(Aq);
.Ve
.SS "E:first\-of\-type"
.IX Subsection "E:first-of-type"
An \f(CW\*(C`E\*(C'\fR element, first sibling of its type.
.PP
.Vb 1
\& my $first = $css\->select(\*(Aqdiv p:first\-of\-type\*(Aq);
.Ve
.SS "E:last\-of\-type"
.IX Subsection "E:last-of-type"
An \f(CW\*(C`E\*(C'\fR element, last sibling of its type.
.PP
.Vb 1
\& my $last = $css\->select(\*(Aqdiv p:last\-of\-type\*(Aq);
.Ve
.SS "E:only\-child"
.IX Subsection "E:only-child"
An \f(CW\*(C`E\*(C'\fR element, only child of its parent.
.PP
.Vb 1
\& my $lonely = $css\->select(\*(Aqdiv p:only\-child\*(Aq);
.Ve
.SS "E:only\-of\-type"
.IX Subsection "E:only-of-type"
An \f(CW\*(C`E\*(C'\fR element, only sibling of its type.
.PP
.Vb 1
\& my $lonely = $css\->select(\*(Aqdiv p:only\-of\-type\*(Aq);
.Ve
.SS "E.warning"
.IX Subsection "E.warning"
An \f(CW\*(C`E\*(C'\fR element whose class is \*(L"warning\*(R".
.PP
.Vb 1
\& my $warning = $css\->select(\*(Aqdiv.warning\*(Aq);
.Ve
.SS "E#myid"
.IX Subsection "E#myid"
An \f(CW\*(C`E\*(C'\fR element with \f(CW\*(C`ID\*(C'\fR equal to \*(L"myid\*(R".
.PP
.Vb 1
\& my $foo = $css\->select(\*(Aqdiv#foo\*(Aq);
.Ve
.SS "E:not(s)"
.IX Subsection "E:not(s)"
An \f(CW\*(C`E\*(C'\fR element that does not match simple selector \f(CW\*(C`s\*(C'\fR.
.PP
.Vb 1
\& my $others = $css\->select(\*(Aqdiv p:not(:first\-child)\*(Aq);
.Ve
.SS "E F"
.IX Subsection "E F"
An \f(CW\*(C`F\*(C'\fR element descendant of an \f(CW\*(C`E\*(C'\fR element.
.PP
.Vb 1
\& my $headlines = $css\->select(\*(Aqdiv h1\*(Aq);
.Ve
.SS "E > F"
.IX Subsection "E > F"
An \f(CW\*(C`F\*(C'\fR element child of an \f(CW\*(C`E\*(C'\fR element.
.PP
.Vb 1
\& my $headlines = $css\->select(\*(Aqhtml > body > div > h1\*(Aq);
.Ve
.SS "E + F"
.IX Subsection "E + F"
An \f(CW\*(C`F\*(C'\fR element immediately preceded by an \f(CW\*(C`E\*(C'\fR element.
.PP
.Vb 1
\& my $second = $css\->select(\*(Aqh1 + h2\*(Aq);
.Ve
.SS "E ~ F"
.IX Subsection "E ~ F"
An \f(CW\*(C`F\*(C'\fR element preceded by an \f(CW\*(C`E\*(C'\fR element.
.PP
.Vb 1
\& my $second = $css\->select(\*(Aqh1 ~ h2\*(Aq);
.Ve
.SS "E, F, G"
.IX Subsection "E, F, G"
Elements of type \f(CW\*(C`E\*(C'\fR, \f(CW\*(C`F\*(C'\fR and \f(CW\*(C`G\*(C'\fR.
.PP
.Vb 1
\& my $headlines = $css\->select(\*(Aqh1, h2, h3\*(Aq);
.Ve
.SS "E[foo=bar][bar=baz]"
.IX Subsection "E[foo=bar][bar=baz]"
An \f(CW\*(C`E\*(C'\fR element whose attributes match all following attribute selectors.
.PP
.Vb 1
\& my $links = $css\->select(\*(Aqa[foo^=b][foo$=ar]\*(Aq);
.Ve
.SH "ATTRIBUTES"
.IX Header "ATTRIBUTES"
Mojo::DOM::CSS implements the following attributes.
.SS "tree"
.IX Subsection "tree"
.Vb 2
\& my $tree = $css\->tree;
\& $css = $css\->tree([\*(Aqroot\*(Aq]);
.Ve
.PP
Document Object Model. Note that this structure should only be used very
carefully since it is very dynamic.
.SH "METHODS"
.IX Header "METHODS"
Mojo::DOM::CSS inherits all methods from Mojo::Base and implements the
following new ones.
.SS "match"
.IX Subsection "match"
.Vb 1
\& my $bool = $css\->match(\*(Aqhead > title\*(Aq);
.Ve
.PP
Match \s-1CSS\s0 selector against first node in \*(L"tree\*(R".
.SS "select"
.IX Subsection "select"
.Vb 1
\& my $results = $css\->select(\*(Aqhead > title\*(Aq);
.Ve
.PP
Run \s-1CSS\s0 selector against \*(L"tree\*(R".
.SS "select_one"
.IX Subsection "select_one"
.Vb 1
\& my $result = $css\->select_one(\*(Aqhead > title\*(Aq);
.Ve
.PP
Run \s-1CSS\s0 selector against \*(L"tree\*(R" and stop as soon as the first node
matched.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Mojolicious, Mojolicious::Guides, .