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Editor to share with you what cssnano is, I believe that most people do not know much about it, so share this article for your reference, I hope you will learn a lot after reading this article, let's go to understand it!

When using CSS to render the critical path of a page, it becomes important to use a compact, well-structured stylesheet document. In other words, the default browser web page rendering process does not stop until the stylesheet is loaded, parsed, and executed. Therefore, if the CSS document is large and cluttered, the site will take a long time to load.

Cssnano is the CSS optimization and decomposition plug-in for PostCSS. Cssnano uses a well-formed CSS and goes through many optimizations to ensure that the final production environment is as small as possible.

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