前端学习案例-weakMap知识铺垫 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>weakMap</title>
</head>
<body>
    <script>
        // WeakMap
        const oBtn1=document.querySelector("#btn1")
        const oBtn2=document.querySelector("#btn2")
        oBtn1.addEventListener("click",handleBtnClick,false)
        oBtn2.addEventListener("click",handleBtnClick,false)
        function handleBtn1Click(){
        }
        function handleBtn2Click(){   
        }
        oBtn1.remove()
        oBtn2.remove()          
        handleBtn1Click=null;
        handleBtn2Click=null;
        const oBtn3=new WeakMap()
        const oBtn4=new WeakMap()
        oBtn3.addEventListener("click",oBtnMap.get(oBtn3),false)
        oBtn4.addEventListener("click",oBtnMap.get(oBtn4),false)
        oBtn3.remove()
        oBtn4.remove()  
    </script>
</body>
</html>

posted @ 2022-08-26 20:35  前端导师歌谣  阅读(27)  评论(0)    收藏  举报