鼠标移过显示二维码代码

$(document).ready(function(){
    var t,t1;
    $(".side ul li.code-wrap").hover(function(){
        var _this = $(this);
        clearTimeout(t1);
        t = setTimeout(function(){
            _this.find('.popup').show();
        },300)
    },function(){
        var _this = $(this);
        clearTimeout(t);
        t1=setTimeout(function(){
            _this.find('.popup').hide();
        },100)
    });
});

<li class="code-wrap">
            <a href="#"><div class="sidebox"><img src="../assets/img/icon_code.png">二维码</div></a>
            <div class="popup">
                <a class="code-link">
                    <img class="code" src="../assets/img/weixin_code.png">
                </a>
                <span>加真源为微信好友</span>
                <div class="arr"></div>
            </div>
        </li>

            .popup {
                display: none;
                position: absolute;
                left: -180px;
                bottom: 0;
                text-align: center;
                border-radius: 2px;
                width: 170px;
                height: 200px;
                background: #fff;
                box-shadow: 0 1px 8px rgba(0,0,0,.1);
                font-size: 14px;
                .code-link {
                    display: block;
                    margin: 10px;
                    color: #777;
                    .code {
                        display: block;
                        margin-bottom: 10px;
                    }
                }
                .arr {
                    position: absolute;
                    right: -6px;
                    bottom: 14px;
                    width: 6px;
                    height: 11px;
                    background: url(../img/code_arrow.png) 0 0 no-repeat;
                }
            }