CSS supported selectors

What follows is a list of CSS selectors currently supported in latest NWSAPI version.

The list has been built upon current W3C Selectors Level 4 though it is still a work in progress.

Text and/or character selectors (content) have no meanings for applications, they don’t work on element nodes but on text nodes, which do not provide an event interface needed for node selection.

Universal selector

* (asterisk)

any Element

Tag, Id and Class selectors

E	an Element of type E
E#fooId	an E element with ID equal to “fooId”
E.fooClass	an E element with CLASS equal to “fooClass”

Combinators selectors (child and siblings)

E F	an F element descendant child of an E element
E > F	an F element direct 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

Attribute selectors

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 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[foo~=“bar”]	an E element whose “foo” attribute value is a list of whitespace-separated values, one of which is exactly equal to “bar”
E[foo|=“en”]	an E element whose “foo” attribute value is a hyphen-separated list of values beginning (from the left) with “en”

Structural pseudo-classes selectors

E:root	an E element, root of the document
E:empty	an E element that has no children (including text nodes)
E:nth-child(n)	an E element, the n-th child of its parent
E:nth-of-type(n)	an E element, the n-th sibling of its type
E:nth-last-child(n)	an E element, the n-th child of its parent, counting from the last one
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:only-child	an E element, only 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-of-type	an E element, only sibling of its type

Negation pseudo-classes selector

E:not(s)

an E element that does not match simple selector s

Hyper-link, Target and Language pseudo-classes selectors

E:link	an E element being the source anchor of an hyper-link never visited
E:visited	an E element being the source anchor of an hyper-link already visited
E:target	an E element being the target of the referring URI
E:lang(it)	an E element having content in language “it”

User action pseudo-classes selectors

E:active	an E element during certain user actions
E:hover	an E element during a mouse over action
E:focus	an E element being the focus of the document

UI element state pseudo-classes selectors

E:enabled	an UI element E whose “disabled” property is set to false
E:disabled	an UI element E whose “disabled” property is set to true
E:checked	an UI element E whose “checked” or “selected” property is set to true (radio, checkbox, option)

WebForms and HTML5 support (optional external add-on)

E:indeterminate	an UI element E whose “indeterminate” property is set to true
E:default	an UI element E whose “defaultChecked” or “defaultSelected” properties are set to true
E:optional	an UI element E whose “required” property is set to false
E:required	an UI element E whose “required” property is set to true
E:invalid	an UI element E with constraint validation that do not satisfy its constraints
E:valid	an UI element E with constraint validation that satisfy its constraints
E:in-range	an UI element E with constraint validation not suffering for overflow or underflow
E:out-of-range	an UI element E with constraint validation suffering for overflow or underflow
E:read-only	an UI element E whose “readOnly” property is set to true
E:read-write	an UI element E whose “readOnly” property is set to false

Legacy support (optional external add-on)

E[foo!=“bar”]	an E element whose “foo” attribute value is not exactly equal to “bar”
E:selected	an UI element E whose “selected” property is set to true (option)
E:contains()	an E element whose textual contents contain the given substring

Content pseudo-element selectors (not supported)

E::after	generated content after an E element
E::before	generated content before an E element
E::selection	portion of a document highlighted by the user
E::first-line	the first formatted line of an E element
E::first-letter	the first formatted letter of an E element