React 源码中的依赖注入方法

class Person {
  eat() {
    const dinner = new Dinner('法国菜');
    console.log('开饭啦！，今晚自己做：', dinner.name);
  }
}

class Dinner {
  constructor(name) {
    this.name = name;
  }
}

class Person {
  eat(dinner) {
    console.log('开饭啦！，今晚有大厨给我做：', dinner.name);
  }
}

// ReactDOM.js
var ReactDefaultInjection = require('ReactDefaultInjection');
ReactDefaultInjection.inject();

// ReactNative.js
var ReactNativeDefaultInjection = require('ReactNativeDefaultInjection');
ReactNativeDefaultInjection.inject();

var DOMProperty = require('DOMProperty');
var EventPluginHub = require('EventPluginHub');
var EventPluginUtils = require('EventPluginUtils');
var ReactComponentEnvironment = require('ReactComponentEnvironment');
var ReactEmptyComponent = require('ReactEmptyComponent');
var ReactBrowserEventEmitter = require('ReactBrowserEventEmitter');
var ReactHostComponent = require('ReactHostComponent');
var ReactUpdates = require('ReactUpdates');

var ReactInjection = {
 Component: ReactComponentEnvironment.injection,
 DOMProperty: DOMProperty.injection,
 EmptyComponent: ReactEmptyComponent.injection,
 EventPluginHub: EventPluginHub.injection,
 EventPluginUtils: EventPluginUtils.injection,
 EventEmitter: ReactBrowserEventEmitter.injection,
 HostComponent: ReactHostComponent.injection,
 Updates: ReactUpdates.injection,
};

module.exports = ReactInjection;

// ReactUpdates.js
var ReactUpdatesInjection = {
  injectReconcileTransaction: function (ReconcileTransaction) {
    ...
    ReactUpdates.ReactReconcileTransaction = ReconcileTransaction;
  },

  injectBatchingStrategy: function (_batchingStrategy) {
    ...
    batchingStrategy = _batchingStrategy;
  },
};

var ReactUpdates = {
  ...
  injection: ReactUpdatesInjection,
};

// ReactDefaultInjection.js
var ReactInjection = require('ReactInjection');
var ReactReconcileTransaction = require('ReactReconcileTransaction');
var ReactDefaultBatchingStrategy = require('ReactDefaultBatchingStrategy');

...

function inject() {
  ...

  ReactInjection.Updates.injectReconcileTransaction(
    ReactReconcileTransaction
  );
  ReactInjection.Updates.injectBatchingStrategy(
    ReactDefaultBatchingStrategy
  );
}