CSS min-height
它设置元素内容框的最小高度。这意味着内容框的高度可以大于
min-height 的值，但不能更短。
当内容小于最小高度时将应用该元素。否则，如果内容较大，则此属性无效。此属性可确保height属性的值不能小于
min-height 属性的值。它不允许负值。
语法
min-height: none | length | initial | inherit;
此CSS属性的值定义如下：
none：这是默认值，不限制内容框的大小。
length：此值定义最小高度（以px，cm，pt等为单位）。默认值为0。
initial：将属性设置为其默认值。
inherit：它从其父元素继承该属性。
示例
在此例如，内容包含四个段落元素。我们使用
min-height 属性的长度值定义这些段落的最小高度。第一段的最小高度为
50px ，第二段为
6em ，第三段为
130pt ，第四段为
5厘米。
<!DOCTYPE html>
<html>
<head>
<title>
min-height property
</title>
<style>
p {
border: 4px solid blue;
background-color: lightblue;
font-size: 20px;
}
#px {
min-height: 50px;
}
#em {
min-height: 6em;
}
#pt {
min-height: 130pt;
}
#cm {
min-height: 5cm;
}
</style>
</head>
<body>
<h3> min-height: 50px; </h3>
<p id="px">
Hi, Welcome to the lidihuo.com. This site is developed so that students may learn computer science related technologies easily. The lidihuo.com is always providing an easy and in-depth tutorial on various technologies. No one is perfect in this world, and nothing is eternally best. But we can try to be better.
</p>
<h3> min-height: 6em; </h3>
<p id="em">
Hi, Welcome to the lidihuo.com. This site is developed so that students may learn computer science related technologies easily. The lidihuo.com is always providing an easy and in-depth tutorial on various technologies. No one is perfect in this world, and nothing is eternally best. But we can try to be better.
</p>
<h3> min-height: 130pt; </h3>
<p id="pt">
Hi, Welcome to the lidihuo.com. This site is developed so that students may learn computer science related technologies easily. The lidihuo.com is always providing an easy and in-depth tutorial on various technologies. No one is perfect in this world, and nothing is eternally best. But we can try to be better.
</p>
<h3> min-height: 5cm; </h3>
<p id="cm">
Hi, Welcome to the lidihuo.com. This site is developed so that students may learn computer science related technologies easily. The lidihuo.com is always providing an easy and in-depth tutorial on various technologies. No one is perfect in this world, and nothing is eternally best. But we can try to be better.
</p>
</body>
</html>
输出
