css - 过渡不适用于悬停

Question

我不知道，但由于某些原因，转换似乎不起作用。我正在测试这个谷歌浏览器。

[data-title] {
	position: relative;
  margin: 100px;
}

[data-title]:hover:before {
  transform: translate(-50%, 0);
	width: 18px;
	height: 6px;
	left: 50%;
	margin-top: 0px;
	top: 100%;
	opacity: 1;
	pointer-events: auto;
  -webkit-transition: all 0.25s;
  transition: all 0.25s;
	content: '';
	position: absolute;
	z-index: 10;
	box-sizing: border-box;
	border-left: 8px solid transparent;
	border-right: 8px solid transparent;
	border-bottom: 10px solid #00204e;
  
}

[data-title]:hover:after {
	transform: translate(-50%, 0);
	left: calc(50%);
	margin-top: 10px;
	top: 100%;
	opacity: 1;
	pointer-events: auto;
  -webkit-transition: all 0.25s;
  transition: all 0.25s;
	font-weight: normal;
	text-shadow: none;
	background: #00204e;
	border-radius: 4px;
	color: #fff;
	content: attr(data-title);
	padding: 10px;
	position: absolute;
	white-space: normal;
	width: max-content;
	font-size: 12px;
	font-family: 'Helvetica Neue';
	line-height: normal;
	max-width: 150px;
	text-align: left;
	height: auto;
	display: inline-block;
}

<span class="dijitButtonContents" id="saveButton" data-title="Save as draft"><span id="saveButton_label">Save</span></span>

任何人都可以帮助我哪里出错或者我遗漏了什么吗？

我什至尝试将过渡时间设置为 +1 秒，但仍然反射(reflect)不一样。

Answer 1

您还没有为原始状态设置任何内容，因此转换不知道从哪里开始。如果您只想转换元素的外观 - 例如淡入或淡出，那么您需要做一些事情，例如转换不透明度:

[data-title] {
  position: relative;
  margin: 100px;
}

[data-title]:before {
  width: 18px;
  height: 6px;
  left: 50%;
  margin-top: 0px;
  top: 100%;
  opacity: 1;
  content: '';
  position: absolute;
  z-index: 10;
  box-sizing: border-box;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 10px solid #00204e;
  transform: translate(-50%, 0);
  opacity: 0;
  transition: opacity 0.5s;
  pointer-events: none;
}

[data-title]:after {
  transform: translate(-50%, 0);
  left: calc(50%);
  margin-top: 10px;
  top: 100%;
  opacity: 1;
  font-weight: normal;
  text-shadow: none;
  background: #00204e;
  border-radius: 4px;
  color: #fff;
  content: attr(data-title);
  padding: 10px;
  position: absolute;
  white-space: normal;
  width: max-content;
  font-size: 12px;
  font-family: 'Helvetica Neue';
  line-height: normal;
  max-width: 150px;
  text-align: left;
  height: auto;
  display: inline-block;
  opacity: 0;
  transition: opacity 0.5s;
  pointer-events: none;
}

[data-title]:hover:before,
[data-title]:hover:after {
  opacity: 1;
  pointer-events: auto;
}

<span class="dijitButtonContents" id="saveButton" data-title="Save as draft"><span id="saveButton_label">Save</span></span>