PC 端和移动端用 js 实现关闭页面 [ 新手入门 ]

<script>
    var flag = IsPC(); //true为PC端，false为手机端
    if(flag){
        $('.close_btn').click(function(){
            window.opener=null;
            window.open('','_self');
            window.close();
        })
    }else{
        $('.close_btn').click(function(){
            window.history.back();
        })
    }


    function IsPC() {
        var userAgentInfo = navigator.userAgent;
        var Agents = ["Android", "iPhone",
            "SymbianOS", "Windows Phone",
            "iPad", "iPod"];
        var flag = true;
        for (var v = 0; v < Agents.length; v++) {
            if (userAgentInfo.indexOf(Agents[v]) > 0) {
                flag = false;
                break;
            }
        }
        return flag;
    }
</script>