fon循环总是返回最后值问题

Posted 2020-10-15 dontes

问题距离

window.onload = function(){
    var box = document.getElementById("box");
    var num = 0;
    for(var i=0;i<10;i++){
        box.onclick = function(){
            console.log(i); //总是打印10
        }
    }
    
}

解决办法
window.onload = function(){
    var div = document.getElementsByTagName("div");
    var num = 0;
    for(var i=0;i<div.length;i++){
        (function(i){
            div[i].onclick = function(){
                console.log(i); 
            }
        })(i)
    }
    
}