Align text baseline to bottom of div

问题:

I am trying to align the baseline of some text in a div to the very bottom edge of said div (such that characters like g and j would actually overflow the div)

I can only seem to align the bottom edge of the text element to the bottom edge of the div. I have tried to use vertical-align with values baseline and bottom on the inner and outer element, but without success.

div {
  height: 80px;
  width: 300px;
  background: #ff5;
  position: relative;
}

span {
  font-size: 30px;
  position: absolute;
  left: 0;
  bottom: 0;
}

<div>
  <span>
  TEST gjp ABC
  </span>
</div>

I also want to be able to offset the baseline from the bottom of the div (e.g. bottom: 10px; positions the baseline of the text 10px from the bottom edge of the div).

Edit: I should also mention that I want to keep the position: absolute; property on the span element, because I want to freely position multiple of those in the parent div.

For example, here, A's baseline should be at the bottom edge of the div, B's should be 10px above it and C's 20px:

div {
  height: 80px;
  width: 300px;
  background: #ff5;
  position: relative;
}

span {
  font-size: 30px;
  position: absolute;
  left: 0;
  bottom: 0;
}

<div>
  <span style="left: 0px; bottom: 0px;">
  A
  </span>
  <span style="left: 50px; bottom: 10px;">
  B
  </span>
  <span style="left: 100px; bottom: 20px;">
  C
  </span>
</div>

回答1:

Add a ::before pseudo element with 100% height and display: inline-block; and use it to vertically align the <span> to the baseline:

div {
  height: 80px;
  width: 300px;
  background: #ff5;
  position: relative;
}

div::before {
  display: inline-block;
  height: 100%;
  content: '';
}

span {
  font-size: 30px;
  vertical-align: baseline;
}

<div>
  <span>TEST gjp ABC</span>
</div>

You can apply the same idea to the span itself, but you'll have to state the height of the span:

div {
  height: 80px;
  width: 300px;
  background: #ff5;
  position: relative;
}

span {
  display: inline-block;
  font-size: 30px;
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1em;
  background: red;
}

span::before {
  display: inline-block;  
  height: 100%;
  vertical-align: baseline;
  content: '';
}

<div>
  <span style="left: 0px; bottom: 0px;">gjp</span>
  <span style="left: 50px; bottom: 10px;">gjp</span>
  <span style="left: 100px; bottom: 20px;">gjp</span>
</div>

回答2:

You can also decrease line-height to 0.8em so the text overflow the span .

<div style="height: 80px; width: 300px; background: #ff5; position: relative;">
	<span style="font-size: 30px; position: absolute; left:0; bottom:0;line-height:0.8em;">
		TEST gjp ABC
	</span>
</div>

回答3:

Make the span with a line-height equal to 0 then consider a hidden character that will control the alignment. You may need to adjust the value based on the font used:

.container {
  height: 80px;
  width: 400px;
  background: #ff5;
  position: relative;
}

.container>span {
  font-size: 30px;
  position: absolute;
  left: 0;
  bottom: 0;
  line-height: 0;
}

.container>span:before {
  content: "\200B";
  vertical-align: -0.35em;/* Adjust this */
}

<div class="container">
  <span>TEST gjp ABC</span>
  <span style="font-family:arial;right:0;left:auto;font-size:20px">TEST gjp ABC</span>
</div>

You can also simply consider a translation:

.container {
  height: 80px;
  width: 400px;
  background: #ff5;
  position: relative;
}

.container>span {
  font-size: 30px;
  position: absolute;
  left: 0;
  bottom: 0;
  line-height: 0;
  transform: translateY(-0.35em);
}

<div class="container">
  <span>TEST gjp ABC</span>
  <span style="font-family:arial;right:0;left:auto;font-size:20px">TEST gjp ABC</span>
</div>