Javascript 如何在reactjs中设置setInterval
我尝试使用Javascript 如何在reactjs中设置setInterval,javascript,reactjs,setinterval,Javascript,Reactjs,Setinterval,我尝试使用setInterval调用reactjs中的函数,如下所示: import React,{Component} from 'react'; class Timer extends Component { trigger(){ this.clock = this.setState({clock:Date.now()-this.props.date}); } setInterval(this.trigger,1000); constructor(props){ super
setInterval
调用reactjs中的函数,如下所示:
import React,{Component} from 'react';
class Timer extends Component {
trigger(){
this.clock = this.setState({clock:Date.now()-this.props.date});
}
setInterval(this.trigger,1000);
constructor(props){
super(props);
this.state = {
clock:0
};
this.trigger = this.trigger.bind(this);
}
render(){
this.state.clock=Math.round(this.state.clock/1000);
return(
<div>
<p>You are here since</p>
<span>{this.state.clock}</span>
<p>Seconds.</p>
<button onClick={this.trigger}>Click me</button>
</div>
);
}
}
export default Timer;
试试这个:
trigger() {
let newTime = Date.now() - this.props.date;
setInterval(() => {
this.setState({
clock: newTime;
})
}, 1000);
}
您可以通过多种方式执行此函数,最好的选项可能是在组件或容器的componentDidMount()中。然后,它将每秒运行一次,每次更新This.clock的值。try
setInterval(This.trigger,1000)代码>并放入componentDidMount生命周期。现在显示的是相同的错误,请发布整个组件的代码
trigger() {
let newTime = Date.now() - this.props.date;
setInterval(() => {
this.setState({
clock: newTime;
})
}, 1000);
}