js闭包Demo
在body下添加十个a标签,点击依次弹出索引
for (let i = 0; i < 10; i++) { let a = document.createElement('a') a.innerHTML = i ;(function (i) { a.addEventListener('click',function () { alert(i) }) })(i) let body = document.getElementsByTagName('body')[0] body.appendChild(a) }
编辑:--ns868