React(为组件设置默认属性值)

defaultProps

class App extends Component {
    render() {
        let on="hello                       evryone";
        return (

            <div>
            {this.props.name}
            </div>
            );
        } 
    }
    App.defaultProps={
        name:"jack"
    }

static defaultProps

    static defaultProps={
        name:"jack"
    }
    render() {      
        return (
            <div>
            {this.props.name}
            </div>
            );
        } 
    }