javascript中的闭包这一篇就够了 about goodblog HOT 2 OPEN

doucument.body.innerHTML="<div` id=div1>aaa</div>"+"<div id=div2>bbb</div>"+"<div id=div3>ccc</div>";
for(var i=1;i<4;i++){
    !function(i){
        document.getElementById('div'+i);
        addEventListener('click',function(){
           alert(i);//1,2,3 
        });
    }
}

!function() {
    console.log('a')
}()