实现 Vue 框架用户短时间内多次点击同一按钮仅触发一次

export default {
  install(Vue) {
    Vue.directive('preventClick', {
      inserted(button, bind) {
        button.addEventListener('click', () => {
          if (!button.disabled) {
            button.disabled = true;
            setTimeout(() => {
              but.disabled = false
            }, )
          }
        })
      }
    })
  }
}

export function debounce(fn, delay = ) {
 // 记录上一次的延时器
 var timer = null;
 return function() {
  var args = arguments;
  var that = this;
  // 清除上一次延时器
  clearTimeout(timer)
  timer = setTimeout(function() {
    fn.apply(that,args)
  }, delay);
 }
}