<script>
const delay = (function () {
 let timer = 0
 return function (callback, ms) {
  clearTimeout(timer)
  timer = setTimeout(callback, ms)
 }
})()
export default {
methods：{
fn() {
   delay(() => {
    //执行部分
   }, 500)
}
}
}
</script>

var throttle = function(func, delay) {      
  var timer = null;      
  return function() {        
    var context = this;        
    var args = arguments;        
    if (!timer) {          
      timer = setTimeout(function() {            
        func.apply(context, args);            
        timer = null;          
      }, delay);        
    }      
  }    
}    
function handle() {      
  console.log(Math.random());    
}    
window.addEventListener('scroll', throttle(handle, 1000));