html - 专门针对 :hover overriding the an equivalent class for :active 的元素

Question

我有代码让背景的字体颜色分配给一个类，然后有单独的类来更改 :hover 或 :active 上的颜色，但 :active 状态不会触发，除非我删除 :hover 特定类。 CODEPEN

HTML:

<div class="backgroundRed backgroundGreenHover backgroundBlueActive" style="width: 100px; height: 100px;"></div>

CSS:

.backgroundRed, .backgroundRedHover:hover, .backgroundRedActive:active{background:red;}
    .backgroundGreen, .backgroundGreenHover:hover, .backgroundGreenActive:active{background:green;}
    .backgroundBlue, .backgroundBlueHover:hover, .backgroundBlueActive:active{background:blue;}

Answer 1

:active 伪类应该放在 :hover 之后，否则 :hover 会覆盖(链接相关伪类的顺序类是::link | :visited | :hover | :active。)。您的代码示例按预期工作，但如果您更改类，:active 伪类将永远不适用。

.backgroundRed,
.backgroundRedHover:hover,
.backgroundRedActive:active {
  background: red;
}

.backgroundGreen,
.backgroundGreenHover:hover,
.backgroundGreenActive:active {
  background: green;
}

.backgroundBlue,
.backgroundBlueHover:hover,
.backgroundBlueActive:active {
  background: blue;
}

<div class="backgroundRed backgroundBlueHover backgroundGreenActive" style="width: 100px; height: 100px;"></div>

您需要更多 CSS 行，但在 :hover 之后使用 :active 重新排序类可以正常工作。

.backgroundRed,
.backgroundRedHover:hover {
  background: red;
}

.backgroundGreen,
.backgroundGreenHover:hover {
  background: green;
}

.backgroundBlue,
.backgroundBlueHover:hover {
  background: blue;
}

.backgroundRedActive:active {
  background: red;
}

.backgroundGreenActive:active {
  background: green;
}

.backgroundBlueActive:active {
  background: blue;
}

<div class="backgroundRed backgroundBlueHover backgroundGreenActive" style="width: 100px; height: 100px;"></div>