[英]React Component not working with ES6
我用React編寫了這個Timer組件,可以在es5上使用,但是由於某些原因,它在es6上不可用。
class Timer extends React.Component{
constructor() {
super();
this.state = {start: 15}
}
tick() {
this.setState ({start: this.state.start - 1});
}
componentDidMount() {
this.interval = setInterval(this.tick, 1000);
}
componentWillUnmount() {
clearInterval(this.interval);
}
render() {
return <h1> Time here: {this.state.start}</h1>
}
}
ReactDOM.render(<Timer />, document.getElementById('app'));
值得一提的是,我不太熟悉React,仍然希望自己進一步提高自己。
您需要綁定刻度
constructor() {
super();
this.state = {start: 15}
this.tick = this.tick.bind(this)
}
您需要綁定您的tick函數:
class Timer extends React.Component{
constructor() {
super();
this.state = {start: 15}
}
tick() {
this.setState ({start: this.state.start - 1});
}
componentDidMount() {
this.interval = setInterval(this.tick.bind(this), 1000);
}
componentWillUnmount() {
clearInterval(this.interval);
}
render() {
return <h1> Time here: {this.state.start}</h1>
}
}
React.render(<Timer />, document.getElementById('container'));
這是jsfiddle
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