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6 changes: 3 additions & 3 deletions docs/preparation/source.md
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了解了源码的文件目录，这一节我们看看如何调试源码。

即使版本号相同（当前最新版为`17.0.0 RC`），但是`facebook/react`项目`master`分支的代码和我们使用`create-react-app`创建的项目`node_modules`下的`react`项目代码还是有些区别。
即使版本号相同（当前最新版为`17.0.2`），但是`facebook/react`项目`main`分支的代码和我们使用`create-react-app`创建的项目`node_modules`下的`react`项目代码还是有些区别。

因为`React`的新代码都是直接提交到`master`分支，而`create-react-app`内的`react`使用的是稳定版的包。
因为`React`的新代码都是直接提交到`main`分支，而`create-react-app`内的`react`使用的是稳定版的包。

为了始终使用最新版`React`教学，我们调试源码遵循以下步骤：

1. 从`facebook/react`项目`master`分支拉取最新源码
1. 从`facebook/react`项目`main`分支拉取最新源码
2. 基于最新源码构建`react`、`scheduler`、`react-dom`三个包
3. 通过`create-react-app`创建测试项目，并使用步骤2创建的包作为项目依赖的包

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