Transition not working on hover

Question

I don't know but for some reasons, transition doesn't seem to be working. I am testing this Google Chrome.

[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>

Can anyone help where I am going wrong or am I missing something?

I have even tried to make transition timing to +1 seconds but still it doesn't reflects the same.

Answer 1

You have not set anything for the original state so the transition doesn't know what to go from. If you are only wanting to transition the item's appearance - eg fade in or out, then you need to do something like transition the opacity:

[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>