Селектор :first


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 DOM querySelectorAll() 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.