// 只针对最后一次输入触发

    1.     <button id="btn">按钮</button>
    2.     <script>
    3.         var timer
    4.         var btn=document.getElementById("btn");
    5.         btn.onclick=function(){
    6.             debounce(()=>{
    7.                 console.log(1)
    8.             },1000)
    9.         }
    10.         function debounce(fn,time){
    11.             if(timer){
    12.                 clearTimeout(timer)
    13.             }
    14.             timer=setTimeout(fn,time)
    15.         }
    16.     </script>

    01.gif