javascript - 鼠标悬停/移出时

Question

我遇到两个问题。

1. 鼠标悬停功能非常快，但它肯定无法正常工作。我为 onmouseout 状态创建了一个单独的函数，但没有帮助。
2. 类正确更改，但它保持更改状态并且不会返回到其原始类。这取决于链接是否位于所选页面上。任何帮助将不胜感激

JavaScript:

function changeRollover(rollover) {
    var rollItems = document.getElementById(rollover);
    var rollLinks = rollItems.getElementsByTagName('a');
    var noOfLinks = rollLinks.length;
    for (var r = 0; r < noOfLinks; r++) {
        var normalText = rollLinks[r].innerHTML;
        var rolloverText = rollLinks[r].title;
        var rolloverItem = document.getElementById(rollover);
        rolloverItem.innerHTML = "<a href='#' title='" + normalText + "'>" + rolloverText + "</a>";
        rolloverItem.class = rollover + "rollover";    
    }
}

HTML:

<div class="nav">
    <ul id="NavItems">
        <li id="item0" class="selected"  onClick="changeClass(this.id)" 
                       onmouseover="changeRollover(this.id)">
            <a href="#" title="Shop Trends">Collections</a>
        </li>
        <li id="item1" onClick="changeClass(this.id)" 
                       onmouseover="changeRollover(this.id)">
            <a href="#" title="Shop Everything" >All Jewlery</a>
        </li>
        <li id="item2" onmouseover="changeRollover(this.id)" 
                       onClick="changeClass(this.id)">
            <a href="#" title="Shop Press">As Seen On</a>
        </li>
        <li id="item3" onmouseover="changeRollover(this.id)" 
                       onClick="changeClass(this.id)">
            <a href="#" title="fashion + shop">Collaborations</a>
        </li>
        <li id="item4" onmouseover="changeRollover(this.id)" 
                       onClick="changeClass(this.id)">
            <a href="#" title="Shop Designer">Designer Pop Ups</a>
        </li>
    </ul>
    <div class="shipping">
        <a href="#">start your free orders today<br>
        *** click here for more information ***</a>
    </div>
</div>
<!-- .nav -->

Answer 1

使用一些简单的 CSS 可以更好地实现您想要的效果(从可用性 Angular 来看是可疑的，但除此之外):

#NavItems .hover {
  display: none;
}
#NavItems:hover .hover {
  display: inline;
}
#NavItems:hover .normal {
  display: none;
}

这需要这样的标记:

<ul id="NavItems">
  <li id="item0">
    <a href="#">
      <span class="normal">Collections</span><span class="hover">Shop Trends</span>
    </a>
  </li>
</ul>