Disclaimer: This article is a blogger original article, shall not be reproduced without the bloggers allowed. https://blog.csdn.net/qq_36251118/article/details/88051706
Browser rendering process is broadly divided into the following steps:
1、解析HTML生成DOM树。
2、解析CSS生成CSSOM规则树。
3、将DOM树与CSSOM规则树合并在一起生成渲染树。
4、遍历渲染树开始布局，计算每个节点的位置大小信息。
5、将渲染树每个节点绘制到屏幕。
Illustrated as follows:
