timer:number;
start() {
this.timer=setInterval(()=>this.span.innerHTML=newDate().toTimeString(), 500);
}
stop(){
clearTimeout(this.timer);
}
timer:number;
start() {
this.timer=setInterval(()=>this.span.innerHTML=newDate().toTimeString(), 500);
}
stop(){
clearTimeout(this.timer);
}