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box-sizing
2022-06-24 13:02:00 【snotJam】
文章目录
box-sizing的默认值是content-box
表示这个元素所要渲染的区域是:
自己本身的宽高+padding的距离+margin的距离
如果设置值为:border-box
表示这个元素所要渲染的区域是指定的宽高,
设置的padding和margin都会在设置的宽高的范围内设置


如果我们使用了border-box,child宽度使用100%,会对宽度进行压缩
如果我们使用了border-box,child宽度使用100px,则不会进行压缩,就是把组件渲染完之后,没有剩余空间来绘制padding了
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