How to read the source code of the front-end framework angular,react,vue

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ask the gods how to read the source code of the framework and read it with purpose.
try to download the vue source code in github. I don"t know what to do after npm I. Will the source code work? How do I run?

Angular4 react.js vue.js

Mar.30,2022

http://hcysun.me/vue-design/

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