React 组件间通信

https://jsfiddle.net/69z2wepo/9719/

<script src="https://facebook.github.io/react/js/jsfiddle-integration.js"></script>

<div >
    <!-- This element's contents will be replaced with your component. -->
</div>
<hr/>
<div >
    <!-- This element's contents will be replaced with your component. -->
</div>

<hr/>
<!--在容器页面中操作Foo的方法-->
<div onclick="clickSpan()" >click me to change Foo's age to 20 from container page</div>

var Foo=React.createClass({
//setGender是部件Foo向外公开的一个方法，用于操作Foo的gender值
        setAge:function(age){
            var stateVal={};
            if(age>20)
            {
                stateVal={gender:'male',age:age}
            }
            else
            {
                stateVal={gender:'femle',age:age}
            }
            this.setState(stateVal);
        },
        getInitialState:function(){
            return {
                age:0,
                gender:'female'
            }
        },
    render:function(){
        return <div>
            <div>
            <strong>{this.props.componentName}</strong>
            </div>
            <div>
            gender:<input value={this.state.gender}  type="text" ref="txt"  />
            </div>
            <div>
            age:{this.state.age}
            </div>
        </div>
    }
});

var Bar = React.createClass({
    onAgeChange:null,
    render: function() {
        return <div>
            <div onClick={this.helloClick}>
               <strong>{this.props.componentName}</strong>(click me to show age value)
            </div>
            <div>
            age:<input onChange={this.onChange} type="text" ref="age"  />
            </div>
            <div>
            age:{this.state.age}
            </div>
        </div>;
    },
    helloClick:function(){
        alert(this.refs.age.getDOMNode().value);
    },
    onChange:function(e){
        if(this.onAgeChange) this.onAgeChange(e.target.value);
        this.state.age=e.target.value;
        this.setState({age: e.target.value});
        //this.forceUpdate();
    },
    getInitialState:function(){
        return {
            age:0
        }
    },
    componentDidMount:function(){
        this.refs.age.getDOMNode().value=this.state.age;
    }
});
 

var foo=React.render(<Foo componentName="Foo"/>, document.getElementById('container'));

var bar=React.render(<Bar componentName="Bar" />, document.getElementById('container1'));




bar.onAgeChange=function(age){
    foo.setAge(age);
}

function clickSpan(){
// 在容器页面中操作Foo的方法
    foo.setAge(22);
}

参考

Thinking in React

https://facebook.github.io/react/docs/thinking-in-react.html