"use strict";var React = require('react');var ReactDOM = require('react-dom');class Counter extends React.Component {    constructor(props) {        super(props);        this.state = {count: 0};    }    tick() {        this.setState({count: this.state.count + 1});    }    render() {        return (            
    
                
     
                    Clicks: {this.state.count}                
                
     加1            
    
        )    }}ReactDOM.render(
    , document.getElementById('app'))