classDemoextendsComponent{
constructor(){
this.state={
count:0,
}
this.timer=null
}
countClick=()=>{
clearTimeOut(this.timer)
letcount=this.state.count
this.setState({count:count+1})
this.timer=setTimeOut(this.fetch,2000)
}
fetch=()=>{
//請求后臺
}
render(){
return點擊+{this.state.count}