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基于react组件之间的参数传递(详解)

1、父组件向子组件传递参数

class Child extends Component {
    componentDidMount(){
      let name = this.props.default;
      console,log(name);
    }
    render(){
      const { default} = this.props;
      return (
        <Input />
      )
   }
}
import React, { Component } from 'react';
import Child from './Child';

class Parent extends Component {
  state = {
    name: 'Bob'
  }
  render() {
    return (
      <div>
        <Child default={this.state.name} />
      </div>
    )
  }
}

2、子组件向父组件传递参数

class Child extends Component {
    state={
      name:'Bob'
    }
    componentDidMount(){
      this.props.toParent(this.state.name);
    }
    render(){
      return (
        <Input />
      )
   }
}
import React, { Component } from 'react';
import Child from './Child';

class Parent extends Component {
   state = {
    name:''
  }
  getChildInfo = (name)=>{
     this.setState({name:name});
   }
  render() {
    return (
      <div>
        <Child toParent={this.getChildInfo.bind(this)} />
      </div>
    )
  }
}

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