个人中心
文章发布
退出
作者热门文章
- android - RelativeLayout 背景可绘制重叠内容
- android - 如何链接 cpufeatures lib 以获取 native android 库？
- java - OnItemClickListener 不起作用，但 OnLongItemClickListener 在自定义 ListView 中起作用
- java - Android 文件转字符串
27
4
我有Codepen我尝试使用三个文件(index.html、main.js 和 style.css)在网页上复制的代码。我尝试在 HTML 文件的 head 标签上加载这些脚本。
<script src="https://npmcdn.com/babel-transform-in-browser@6.4.6/dist/btib.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.14.7/react.min.js"></script>
但是，它不起作用。我得到的只是这个错误
Uncaught SyntaxError: Unexpected token <
将此 react 代码加载到 HTML 需要哪些 CDN 脚本文件？
最佳答案
您需要使用babel standalone 脚本来转译代码，并且您需要包含react 和react-dom 的脚本，使用这些就可以了:
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.24.0/babel.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
它与codepen一起工作的原因:检查设置/javascript，在那里你会发现babel被选为JavaScript Preprocessor，codepen自动包含脚本，但要在本地运行这些文件，您需要包含独立脚本。
更新:
1- 您需要在渲染 react 代码的 div 之后定义脚本，否则会抛出错误。像这样:
<body>
<div id="root"></div>
<script type="text/babel" src="pomodoro.js"></script>
</body>
2- 使用 ReactDOM.render 而不是 React.render。
检查工作代码:
<html>
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.24.0/babel.js"></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.18.1/moment.min.js'></script>
</head>
<body>
<div id='root'></div>
<script type='text/babel'>
class SetTimer extends React.Component{
render(){
return (
<div className="set-timer">work <br/> session
<div className="minus-add">
<button className="setting-button" id="minus-timer" onClick={this.props.minus}>-</button>
<button className="setting-button" id="add-timer" onClick={this.props.add}>+</button>
</div>
</div>
);
}
}
class SetBreak extends React.Component{
render(){
return (
<div className="set-break"> break<br/> session
<div className="minus-add">
<button className="setting-button" id="minus-break" onClick={this.props.minusbreak}>-</button>
<button className="setting-button" id="add-break" onClick={this.props.addbreak}>+</button>
</div>
</div>
);
}
}
const leftPad = (time)=>{
return (time<10)? '0'+time :time
}
const TimerDisplay = (props) => (
<div className="timer-display"><span className="worklabel">Work session time</span><br/>
{props.currentTime}
<div className="breaktime"><span className="breaklabel">break session time</span><br/>{props.breakTime}</div>
</div>
);
// let baseTime= 25;
class App extends React.Component {
constructor(){
super();
this.state = {
baseTime:25,
breakTime:5,
currentTime: moment.duration(25,'minutes'),
timer:null,
startbuttonvisible:true,
pausebuttonvisible:false,
resumebuttonvisible:false,
stopbuttonvisible:false,
}
this.minus =this.minus.bind(this);
this.add =this.add.bind(this);
this.minusbreak =this.minusbreak.bind(this);
this.addbreak =this.addbreak.bind(this);
this.startTimer = this.startTimer.bind(this);
this.pauseTimer = this.pauseTimer.bind(this);
this.resumeTimer = this.resumeTimer.bind(this);
this.stopTimer = this.stopTimer.bind(this);
this.reduceTimer = this.reduceTimer.bind(this);
}
add(){
this.setState({
baseTime:this.state.baseTime+1
});
}
minus(){
this.setState({
baseTime:this.state.baseTime-1
});
}
addbreak(){
this.setState({
breakTime:this.state.breakTime+1
});
}
minusbreak(){
this.setState({
breakTime:this.state.breakTime-1
});
}
startTimer(){
this.setState({
timer: setInterval(this.reduceTimer, 1000),
startbuttonvisible:false,
pausebuttonvisible:true,
stopbuttonvisible:true,
});
}
pauseTimer(){
clearInterval(this.state.timer);
this.setState({
pausebuttonvisible:false,
resumebuttonvisible:true,
});
}
resumeTimer(){
this.setState({
timer: setInterval(this.reduceTimer, 1000),
startbuttonvisible:false,
pausebuttonvisible:true,
stopbuttonvisible:true,
resumebuttonvisible:false,
});
}
stopTimer(){
clearInterval(this.state.timer);
this.setState({
baseTime:25,
timer: null,
startbuttonvisible:true,
pausebuttonvisible:false,
stopbuttonvisible:false,
resumebuttonvisible:false,
});
}
reduceTimer(){
if(this.state.baseTime === 0) return;
const newTime = this.state.baseTime - 1;
this.setState({
baseTime: newTime,
});
}
render() {
return (
<div className="container">
<div className="timebox">
<div className="header">
Pomodoro Clock
</div>
<TimerDisplay currentTime={this.state.baseTime} breakTime={this.state.breakTime}/>
<div id="action-title">
<small>SETTINGS</small>
</div>
<div className="actions">
<SetTimer minus={this.minus} add={this.add}/>
<SetBreak minusbreak={this.minusbreak} addbreak={this.addbreak}/>
</div>
<div className="timer-control">
{this.state.startbuttonvisible ? <button id="start-timer" onClick={this.startTimer}>
START
</button> : null}
{this.state.pausebuttonvisible ? <button id="pause-timer" onClick={this.pauseTimer}>
PAUSE
</button>: null}
{this.state.resumebuttonvisible ? <button id="resume-timer" onClick={this.resumeTimer}>
RESUME
</button>: null}
{this.state.stopbuttonvisible ? <button id="stop-timer" onClick={this.stopTimer}>
STOP
</button>: null}
</div>
</div>
</div>
);
}
}
ReactDOM.render(
<App />,
document.getElementById('root')
);
</script>
</body>
</html>关于javascript - 如何用cdn加载html中的es6、react、babel代码？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/43931538/
27
4
0
我是一名优秀的程序员,十分优秀！