this.show = false;
							   const TIME_COUNT = 60;   
							   if (!this.timer) {    
							   this.count = TIME_COUNT;    
							   
							   this.timer = setInterval(() => {    
							    if (this.count > 0 && this.count <= TIME_COUNT) {     
							    this.count--;    
                                    //將秒數複製給你要顯示的文字
							    	this.btnText = this.count+' s'
							    } else {     
							         this.show = true;     
							         clearInterval(this.timer);     
							         this.timer = null;    
							         this.btnText = "重新發送";
							    }    
							   }, 1000)    
							   }
 

別忘了定義show和count哦~~