In CSS, you can use the height attribute to set the height of an element. You only need to add the "height:20px;" style to the element to set the height of the element to "20px". The height attribute is used to set the height of the element. This attribute defines the height of the element's content area. Inline non-replaced elements will ignore this attribute.
The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.
css set the element height to 20px
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
img.normal {
height: auto;
}
img.big {
height: 120px;
}
p {
border: 1px solid red;
}
p.ex {
height: 250px;
width: 250px;
}
</style>
</head>
<body>
<img class="normal lazy" src="/static/imghwm/default1.png" data-src="img/1.jpg" style="max-width:90%" style="max-width:90%" / alt="How to set element height to 20px in css" ><br>
<img class="big lazy" src="/static/imghwm/default1.png" data-src="img/1.jpg" style="max-width:90%" style="max-width:90%" / alt="How to set element height to 20px in css" >
<p>默认宽度和高度。这是段落中的一些文本。这是段落中的一些文本。 这是段落中的一些文本。</p>
<p class="ex">段落的高和宽是 250px。这是段落中的一些文本。这是段落中的一些文本。这是段落中的一些文本。</p>
</body>
</html>Rendering:
(Learning video sharing: css video tutorial)
css height attribute
The height attribute sets the height of the element. The default value is auto and there is no inheritance.
The height attribute defines the height of the element's content area. Pads, borders, and margins can be added outside the content area.
Inline non-replaced elements will ignore this attribute.
Attribute value of the height attribute:
| Value | Description |
|---|---|
| auto | default. The browser will calculate the actual height. |
| length | Use px, cm and other units to define the height. |
| % | Based on the percentage height of the block-level object that contains it. |
| inherit | Specifies that the value of the height attribute should be inherited from the parent element. |
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