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源码文件指引地址:https://www.processon.com/view/link/5dd68342e4b001fa2e0c4697

##说明 本项目用于调试源码,即修改配置使得项目中引用的 react 包来自 src/react,使得我们可以在 src/react 下 debug 和打 log 调试。

##使用步骤

  1. 在根目录下安装: npm install
  2. 解压 src 下的 react(v16.13.1) 压缩包,源码中有些配置需要修改,压缩包里我已经修改完,你只需要直接解压即可。
  3. 在根目录下启动: npm start

##其他修改

修改配置

src下有个CONST配置文件,可以运行源码的src/react或者是运行学习使用的kreact,自己选择就行了。

如果报错找不到CONST文件,看下你本地的文件名是const还是CONST,保证代码中的引入文件名和本地文件名一致。

修改react包

如果想要自己重新 clone react,有以下 5 个文件需要更改:

  1. /src/react/packages/react-reconciler/src/ReactFiberHostConfig.js
//invariant(false, 'This module must be shimmed by a specific renderer.'); //sy
export * from "./forks/ReactFiberHostConfig.dom";
  1. /src/react/packages/shared/invariant.js
export default function invariant(condition, format, a, b, c, d, e, f) {
  if (condition) return; //加上这个
  throw new Error(
    "Internal React error: invariant() is meant to be replaced at compile " +
      "time. There is no runtime version."
  );
}
  1. /src/react/packages/shared/ReactSharedInternals.js
// import React from 'react';
// const ReactSharedInternals =
//   React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED;

import ReactSharedInternals from "../react/src/ReactSharedInternals";
export default ReactSharedInternals;
  1. /src/react/packages/scheduler/index.js

    "use strict";
    
    export * from "./src/Scheduler";
    //添加以下
    export {
      unstable_flushAllWithoutAsserting,
      unstable_flushNumberOfYields,
      unstable_flushExpired,
      unstable_clearYields,
      unstable_flushUntilNextPaint,
      unstable_flushAll,
      unstable_yieldValue,
      unstable_advanceTime
    } from "./src/SchedulerHostConfig.js";
  2. react/packages/scheduler/src/SchedulerHostConfig.js

// 注释掉这里
// throw new Error('This module must be shimmed by a specific build.');

// 添加以下
export {
  unstable_flushAllWithoutAsserting,
  unstable_flushNumberOfYields,
  unstable_flushExpired,
  unstable_clearYields,
  unstable_flushUntilNextPaint,
  unstable_flushAll,
  unstable_yieldValue,
  unstable_advanceTime
} from "./forks/SchedulerHostConfig.mock.js";

export {
  requestHostCallback,
  requestHostTimeout,
  cancelHostTimeout,
  shouldYieldToHost,
  getCurrentTime,
  forceFrameRate,
  requestPaint
} from "./forks/SchedulerHostConfig.default.js";

参考:

nannongrousong/blog#1 https://github.com/bubucuo/react-sourcecode-debug-env

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