想要做个div居中 可是这个不会随着滚动条走 但是刷新了就好了？
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Title body{ height:2000px; } #box{ width: 300px; height:300px; position: absolute; background-color: #8c8c8c; } |
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window.onload改成window.onscroll
onload指页面加载完成事件；
onscroll指页面滚动事件 |
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