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This article is to share with you about how CSS works. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Page rendering mechanism

Before I talk about the workflow of CSS, let's take a brief look at the rendering mechanism of the page.

Page rendering can be divided into the following 5 steps:

Process HTML to create DOM tree

Process CSS to create CSSOM tree

Merge render tree according to DOM and CSSOM

Layout according to render tree

Draw the render tree.

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