Содержание:
first selector
Описание: Selects the first matched DOM element.
Добавлен в версии: 1.0jQuery( ":first" )
The :first
pseudo-class is equivalent to :eq( 0 )
. It could also be written as :lt( 1 )
. While this matches only a single element, :first-child can match more than one: One for each parent.
Дополнительные замечания:
-
Because
:first
is a jQuery extension and not part of the CSS specification, queries using:first
cannot take advantage of the performance boost provided by the native DOMquerySelectorAll()
method. To achieve the best performance when using:first
to select elements, first select the elements using a pure CSS selector, then use.filter(":first")
. - Selected elements are in the order of their appearance in the document.