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浏览器什么时候发生回流和重绘？ #12

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SampsonKY opened this issue Oct 4, 2020 · 0 comments

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未完成每日一题浏览器

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SampsonKY commented Oct 4, 2020

浏览器什么时候发生回流和重绘？

明确一点：回流必将引起重绘，重绘不一定会引起回流。

回流：

页面首次渲染
添加或删除可见的dom
元素尺寸或者位置发生变化
元素内容发生变化
浏览器窗口大小改变
激活css伪类
查询某些属性或者调用某些方法

重绘：页面中元素样式的改变不影响其在文档流中的位置时，浏览器会将新样式赋予给元素并重新绘制它。

SampsonKY added 浏览器每日一题未完成 labels

SampsonKY self-assigned this

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