javascript - 悬停在子元素上时是否可以删除部分 CSS 悬停覆盖？

Question

我正在使用 CSS Image Map Generator 伪造图像映射.当用户将鼠标悬停在外部图像上时，我希望整个图像变暗一点并在热点周围出现边框。当他们将鼠标悬停在热点上时，我希望该热点不暗。这可能吗？

1. 此图片显示了一个盒子，其中包含产品界面的图片 - 出于安全目的已将其移除 - 在其中(通过 CSS background-image)。用户现在没有将鼠标悬停在它上面。无可见热点，无图像叠加。
2. 此图片显示用户将鼠标悬停在“外部”图片的一部分上。图像应用了透明叠加层(黑色，45% 不透明度)并且图像映射热点变得可见。
3. 此图片显示用户将鼠标悬停在热点上。

当他们将鼠标悬停在热点上时，我希望删除父悬停覆盖的热点区域。那可能吗？我会接受任何可证明的解决方案。 Javascript/jQuery 没问题。

HTML:

<div class="map_image">
          <div class="overlay">
                <a class="map_link" id="map_link_0" href="dp"></a>
                <a class="map_link" id="map_link_1" href="a"></a>
                <a class="map_link" id="map_link_2" href="s"></a>
                <a class="map_link" id="map_link_3" href="ab"></a>
                <a class="map_link" id="map_link_4" href="ch"></a>
                <a class="map_link" id="map_link_5" href="ai"></a>
                <a class="map_link" id="map_link_6" href="al"></a>
                <a class="map_link" id="map_link_7" href="as"></a>
                <a class="map_link" id="map_link_8" href="o"></a>
                <a class="map_link" id="map_link_9" href="pc"></a>
                <a class="map_link" id="map_link_10" href="wi"></a>
                <a class="map_link" id="map_link_11" href="c"></a>
                <a class="map_link" id="map_link_12" href="pq"></a>
          </div>
</div>

CSS:

.map_image { display: block; width: 200px; height: 596px; position: relative; border: 1px solid gray; }

.map_image .map_link { display: block; position: absolute; text-indent: -999em; overflow: hidden; border: 2px solid orange; }

.map_image #map_link_0 { top: 106px; left: 20px; }
.map_image #map_link_1 { top: 106px; left: 79px; }
.map_image #map_link_2 { top: 106px; left: 138px; }
.map_image #map_link_3 { top: 160px; left: 20px; }
.map_image #map_link_4 { top: 160px; left: 79px; }
.map_image #map_link_5 { top: 160px; left: 138px; }
.map_image #map_link_6 { width: 30px; height: 27px; top: 0px; right: 0px; }
.map_image #map_link_7 { width: 196px; height: 27px; top: 33px; left: 0px; }
.map_image #map_link_8 { bottom: 2px; left: 6px; }
.map_image #map_link_9 { bottom: 2px; left: 43px; }
.map_image #map_link_10 { bottom: 2px; left: 80px; }
.map_image #map_link_11 { bottom: 2px; left: 117px; }
.map_image #map_link_12 { bottom: 2px; left: 155px; }

#map_link_8, #map_link_9, #map_link_10, #map_link_11, #map_link_12 { height: 30px; width: 30px;}

#map_link_0, #map_link_1, #map_link_2, #map_link_3, #map_link_4, #map_link_5 { width: 37px; height: 37px; border-radius: 5px; }

.overlay {  background:rgba(0,0,0,.45); width: 200px; height: 596px; opacity:0; -webkit-transition: opacity .25s ease; -moz-transition: opacity .25s ease;}

.map_image:hover .overlay { opacity:1; }

Answer 1

CBroe 的评论起到了作用。将鼠标悬停在链接元素上时，将背景设置为原始图像，并充分定位以显示链接区域后面的原始位置(考虑到边框大小)。

这是一个 JSFiddle结果(显然发布 Codepen 是一个 nono)。

.map_image {
    display: block;
    width: 200px;
    height: 596px;
    position: relative;
    background: url('https://media.licdn.com/mpr/mpr/p/6/005/086/004/186c3f8.jpg') top left no-repeat;
    border: 1px solid gray;
}
.map_image .map_link {
    display: block;
    position: absolute;
    text-indent: -999em;
    overflow: hidden;
    border: 2px solid orange;
}
.map_image #map_link_0 {
    top: 106px;
    left: 20px;
}
.map_image #map_link_1 {
    top: 106px;
    left: 79px;
}
.map_image #map_link_2 {
    top: 106px;
    left: 138px;
}
.map_image #map_link_3 {
    top: 160px;
    left: 20px;
}
.map_image #map_link_4 {
    top: 160px;
    left: 79px;
}
.map_image #map_link_5 {
    top: 160px;
    left: 138px;
}
.map_image #map_link_6 {
    width: 30px;
    height: 27px;
    top: 0px;
    right: 0px;
}
.map_image #map_link_7 {
    width: 196px;
    height: 27px;
    top: 33px;
    left: 0px;
}
.map_image #map_link_8 {
    bottom: 2px;
    left: 6px;
}
.map_image #map_link_9 {
    bottom: 2px;
    left: 43px;
}
.map_image #map_link_10 {
    bottom: 2px;
    left: 80px;
}
.map_image #map_link_11 {
    bottom: 2px;
    left: 117px;
}
.map_image #map_link_12 {
    bottom: 2px;
    left: 155px;
}
#map_link_8, #map_link_9, #map_link_10, #map_link_11, #map_link_12 {
    height: 30px;
    width: 30px;
}
#map_link_0, #map_link_1, #map_link_2, #map_link_3, #map_link_4, #map_link_5 {
    width: 37px;
    height: 37px;
    border-radius: 5px;
}
.overlay {
    background:rgba(0, 0, 0, .45);
    width: 200px;
    height: 596px;
    opacity:0;
    -webkit-transition: opacity .25s ease;
    -moz-transition: all .25s ease;
}
.map_image:hover .overlay {
    opacity:1;
}
#map_link_0:hover {
    background: url('https://media.licdn.com/mpr/mpr/p/6/005/086/004/186c3f8.jpg') -22px -108px, top left no-repeat;
}
#map_link_1:hover {
    background: url('https://media.licdn.com/mpr/mpr/p/6/005/086/004/186c3f8.jpg') -81px -108px, top left no-repeat;
}
#map_link_2:hover {
    background: url('https://media.licdn.com/mpr/mpr/p/6/005/086/004/186c3f8.jpg') -140px -108px, top left no-repeat;
}
#map_link_3:hover {
    background: url('https://media.licdn.com/mpr/mpr/p/6/005/086/004/186c3f8.jpg') -22px -162px, top left no-repeat;
}
#map_link_4:hover {
    background: url('https://media.licdn.com/mpr/mpr/p/6/005/086/004/186c3f8.jpg') -81px -162px, top left no-repeat;
}
#map_link_5:hover {
    background: url('https://media.licdn.com/mpr/mpr/p/6/005/086/004/186c3f8.jpg') -140px -162px, top left no-repeat;
}

<h1>Interface</h1>

<p>Hover over the image below for cool stuff.</p>
<div class="map_image">
    <div class="overlay">
    <a class="map_link" id="map_link_0" href="pd"></a>
	<a class="map_link" id="map_link_1" href="a"></a>
	<a class="map_link" id="map_link_2" href="s"></a>
	<a class="map_link" id="map_link_3" href="ab"></a>
	<a class="map_link" id="map_link_4" href="ch"></a>
	<a class="map_link" id="map_link_5" href="ai"></a>
	<a class="map_link" id="map_link_6" href="al"></a>
	<a class="map_link" id="map_link_7" href="as"></a>
	<a class="map_link" id="map_link_8" href="o"></a>
	<a class="map_link" id="map_link_9" href="pc"></a>
	<a class="map_link" id="map_link_10" href="wi"></a>
	<a class="map_link" id="map_link_11" href="c"></a>
	<a class="map_link" id="map_link_12" href="pq"></a>
    </div>
</div>