组件中onClick事件怎么禁止短时间内重复点击？

function throttle(func: Function, interval: number) {  
  let lastTime = 0;  
  return () => {  
    const nowTime = Date.now();  
    const remainTime = interval - (nowTime - lastTime);  
    if (remainTime <= 0) {  
      lastTime = nowTime;  
      func();  
    }  
  };  
}  
  
@Entry  
@Component  
struct Index {  
  @State num: number = 0  
  
  build() {  
    Row() {  
      Column() {  
        Text(this.num.toString())  
        Button("click").onClick(throttle(() => {  
          this.num++  
        }, 5000))  
      }  
      .width('100%')  
    }  
    .height('100%')  
  }  
}