react-lifecycle-parent-child.jsx（自github）

react-lifecycle-parent-child.jsx

https://gist.github.com/benweizhu/a4b462758758f560a743

import React from "react";
import { render } from "react-dom";

const ParentComponent = React.createClass({
  getDefaultProps: function() {
    console.log("ParentComponent - getDefaultProps");
  },
  getInitialState: function() {
    console.log("ParentComponent - getInitialState");
    return { text: "" };
  },
  componentWillMount: function() {
    console.log("ParentComponent - componentWillMount");
  },
  render: function() { 
    console.log("ParentComponent - render");
    return (
      

        
        
      
    );
  },
  componentDidMount: function() {
    console.log("ParentComponent - componentDidMount");
  },
  componentWillUnmount: function() {
    console.log("ParentComponent - componentWillUnmount");
  },
  onInputChange: function(e) { 
    this.setState({ text: e.target.value });
  }
});

const ChildComponent = React.createClass({
  getDefaultProps: function() {
    console.log("ChildComponent - getDefaultProps");
  },
  getInitialState: function() {
    console.log("ChildComponent - getInitialState");
    return { dummy: "" };
  },
  componentWillMount: function() {
    console.log("ChildComponent - componentWillMount");
  },
  componentDidMount: function() {
    console.log("ChildComponent - componentDidMount");
  },
  componentWillUnmount: function() {
    console.log("ChildComponent - componentWillUnmount");
  },
  componentWillReceiveProps: function(nextProps) {
    console.log("ChildComponent - componentWillReceiveProps");
    console.log(nextProps);
  },
  shouldComponentUpdate: function(nextProps, nextState) {
    console.log("ChildComponent - shouldComponentUpdate");
    return true;
  },
  componentWillUpdate: function(nextProps, nextState) {
    console.log("ChildComponent - componentWillUpdate");
    console.log("nextProps:");
    console.log(nextProps);
    console.log("nextState:");
    console.log(nextState);
  },
  render: function() { 
    console.log("ChildComponent - render");
    return (
      
Props: {this.props.text}
    );
  },
  componentDidUpdate: function(previousProps, previousState) {
    console.log("ChildComponent - componentDidUpdate");
    console.log("previousProps:");
    console.log(previousProps);
    console.log("previousState:");
    console.log(previousState);
  }
});

render(
  ,
  document.getElementById("root")
);

输出：

初次加载

ParentComponent - getDefaultProps
ChildComponent - getDefaultProps
ParentComponent - getInitialState
ParentComponent - componentWillMount
ParentComponent - render
ChildComponent - getInitialState
ChildComponent - componentWillMount
ChildComponent - render
ChildComponent - componentDidMount
ParentComponent - componentDidMount

当修改了输入时，数据从parent 通过props传递给child

ParentComponent - render
ChildComponent - componentWillReceiveProps
Object {text: "1"}
ChildComponent - shouldComponentUpdate
ChildComponent - componentWillUpdate
nextProps:
Object {text: "1"}
nextState:
Object {dummy: ""}
ChildComponent - render
ChildComponent - componentDidUpdate
previousProps:
Object {text: ""}
previousState:
Object {dummy: ""}