javascript - 将鼠标悬停在子项上并更改父项背景颜色？

Question

我有我的 html 代码:

<div id="bot-bar">
    <nav class="main-nav" id="main">
        <a id="home" href="/">Home</a>
        <a id="events" href="events.php">Events</a>
        <a id="news" href="news.php">News</a>
        <a id="ranks" href="ranks.php">Ranks</a>
        <a id="media" href="media.php">Media</a>
    </nav>
</div>

当我将鼠标悬停在 <a> 上时标签，它应该改变 bot-bar 的颜色分区我怎样才能做到这一点？

Answer 1

var botBar = $('#bot-bar');

botBar.find("a").hover(function(){
   botBar.css({backgroundColor: "red"});      // mouseenter event
}, function(){
   botBar.css({backgroundColor: "green"});    // mouseleave event
});

或更短一些(性能较低但显示一些可能性):

$('#bot-bar a').hover(function( ev ){
   $(this).closest("div").css({background: ev.type=="mouseenter"?"red":"green"});
});

获取当前悬停的元素背景:

var botBar = $('#bot-bar');
var botBarBg = botBar.css("background-color");

botBar.find("a").hover(function(){
   var bg = $(this).css("background-color");
   botBar.css({backgroundColor: bg});      // mouseenter event
}, function(){
   botBar.css({backgroundColor: botBarBg});    // mouseleave event
});

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