context.md

Context 两种方式

1. childContentType
2. createContext

importReactfrom'react'importPropTypesfrom'prop-types'const{ Provider, Consumer }=React.createContext('default')classParentextendsReact.Component{state={ChildContext: '123',newContext: '456',}getChildContext(){return{value: this.state.childContext}}render(){return(<>
)
}}