Description: Selects element if it is currently focused. version added: 1.6jQuery( ":focus" ) As with other pseudo-class selectors (those that begin with a ":"), it is recommended to precede :focus with a tag name or some other selector; otherwise, the universal selector ( "*" ) is implied. In other words, the bare $( ":focus" ) is equivalent to $( "*:focus" ). If you are looking for the currently

現在フォーカスされている要素のIDを取得するには？ 例： var id = $(‘:focus’).attr(“id”); alert(id); 参考サイト。 jQuery( ‘:focus’ ) http://alphasis.info/2011/10/jquery-api-jquery-focus/ jQuery API の jQuery( ‘:focus’ ) は、現在フォーカスされている要素を選択する。