CSS 属性 transform-box 确定与转换属性相关的布局框，例如 transform、translate、scale、rotate 和 transform-origin。
可能的值
CSS 属性 transform-box 可以包含以下关键字值之一：
- content-box：这是默认值。转换将相对于元素的内容框进行应用。
- border-box：转换将相对于元素的边框应用。
- fill-box：相对于元素的绘制区域应用转换，不包括任何描边。
- stroke-box：转换相对于描边边界框应用，其中包括描边区域及其占用的空间。
- view-box：转换将相对于最近的 SVG 视口应用。
适用于
所有可转换的元素。
语法
transform-box = content-box | border-box | fill-box | stroke-box | view-box;
CSS transform-box - 示例
通过并排比较这些框，您应该能够观察到框变换，如下所示：
<html>
<head>
<style>
svg {
width: 120vh;
border: 1px solid #d9d9d9;
position: relative;
margin: auto;
top: 0;
right: 0;
bottom: 0;
left: 0;
}
#box {
transform-origin: 50% 50%; /* anything other than `0 0` to see the effect */
transform-box: content-box;
animation: rotateBox 3s linear infinite;
}
#box1 {
transform-origin: 50% 50%; /* anything other than `0 0` to see the effect */
transform-box: border-box;
animation: rotateBox 3s linear infinite;
}
#box2 {
transform-origin: 50% 50%; /* anything other than `0 0` to see the effect */
transform-box: view-box;
animation: rotateBox 3s linear infinite;
}
#box3 {
transform-origin: 50% 50%; /* anything other than `0 0` to see the effect */
transform-box: fill-box;
animation: rotateBox 3s linear infinite;
}
#box4 {
transform-origin: 50% 50%; /* anything other than `0 0` to see the effect */
transform-box: stroke-box;
animation: rotateBox 3s linear infinite;
}
@keyframes rotateBox {
to {
transform: rotate(360deg);
}
}
</style>
</head>
<body>
<svg id="svg" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 50 50">
<text x="0" y="5" fill="red" font-size="5px">content-box</text>
<g stroke-width="1">
<circle id="center" fill="red" r="1" transform="translate(25 25)" />
<circle id="boxcenter" fill="blue" r=".5" transform="translate(15 15)" />
<rect
id="box"
x="10"
y="10"
width="10"
height="10"
rx="1"
ry="1"
stroke="black"
fill="none" />
</g>
</svg>
<br/>
<svg id="svg" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 50 50">
<text x="0" y="5" fill="red" font-size="5px">border-box</text>
<g>
<circle id="center" fill="red" r="1" transform="translate(25 25)" />
<circle id="boxcenter" fill="blue" r=".5" transform="translate(15 15)" />
<rect
id="box1"
x="10"
y="10"
width="10"
height="10"
rx="1"
ry="1"
stroke="black"
fill="none" />
</g>
</svg>
<br/>
<svg id="svg" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 50 50">
<text x="0" y="5" fill="red" font-size="5px">view-box</text>
<g>
<circle id="center" fill="red" r="1" transform="translate(25 25)" />
<circle id="boxcenter" fill="blue" r=".5" transform="translate(15 15)" />
<rect
id="box2"
x="10"
y="10"
width="10"
height="10"
rx="1"
ry="1"
stroke="black"
fill="none" />
</g>
</svg>
<br/>
<svg id="svg" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 50 50">
<text x="0" y="5" fill="red" font-size="5px">fill-box</text>
<g>
<circle id="center" fill="red" r="1" transform="translate(25 25)" />
<circle id="boxcenter" fill="blue" r=".5" transform="translate(15 15)" />
<rect
id="box3"
x="10"
y="10"
width="10"
height="10"
rx="1"
ry="1"
stroke="black"
fill="none" />
</g>
</svg>
<br/>
<svg id="svg" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 50 50">
<text x="0" y="5" fill="red" font-size="5px">stroke-box</text>
<g>
<circle id="center" fill="red" r="1" transform="translate(25 25)" />
<circle id="boxcenter" fill="blue" r=".5" transform="translate(15 15)" />
<rect
id="box4"
x="10"
y="10"
width="10"
height="10"
rx="1"
ry="1"
stroke="black"
fill="none" />
</g>
</svg>
</body>
</html>
