(function (){
var list=document.getElementById("list-con");
list.addEventListener('click',function (ev) {
var target=ev.target
if (target.className.indexOf("like-btn")>=0){
if (target.classList.contains("active")){
return false
};
target.addClass("active");
}
})
})();
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var list=document.querySelector("list-con"); ?
而不是var list=document.querySelector(".list-con");
不太懂你问什么
1.这种匿名函数最好在最前面加分号(;),否则极容易出现惊喜
2.选择器获取
list-con确定不是.list-con或者#list-con?