In HTML, you can use the width and height attributes to set the size of the button element, and use the background-color attribute to set the color of the button element. The specific syntax is "button{width: width value; height: height value ;background-color: color value;}".
The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.
HTML
Inside the
htmlSet button size and color
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style type="text/css">
button{
width:100px;
height: 100px;
background-color: palevioletred;
}
</style>
</head>
<body>
<button type="button" onclick="alert('你好，世界!')">点我!</button>
</body>
</html>Rendering:
css width and height Properties
width property sets the width of the element.
The height attribute sets the height of the element.
| Value | Description |
|---|---|
| auto | Default value. The browser can calculate the actual width or height. |
| length | Define width or height using units such as px, cm, etc. |
| % | # Defines a percentage width or height based on the width of the containing block (parent element). |
CSS background-color property
The background-color property sets the background color of an element.
| Value | Description |
|---|---|
| ##color | Specifies the background color.|
| Specifies that the background color should be transparent. This is the default |
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