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.book 加上绝对定位 absolute ，为什么clientWidth=100？

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.book 加上绝对定位 absolute ，为什么clientWidth=100？

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clientWidth : width + padding
.book 加上绝对定位 absolute ，为什么clientWidth=100？


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clientWidth = width + padding 没错；这里的也padding为0（不考虑浏览器默认样式）。可是width不为0啊，.book被子元素撑开了，实际宽度也变了，所以clientWidth是100（即2x50）


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