js实现切换导航

            toggleNav(event){
                if($(event.target)[0].className!='selected'){
                    $(event.target)[0].className='selected';
                    $($(event.target)[0]).siblings('li')[0].className='';
                }
            },

    .nav
        ul
            li.selected(@click="toggleNav") 邀请人 
                b
            li(@click="toggleNav") 被邀请人
                b 

    .nav {
        ul {
            display: flex;
            width: 100%;
            z-index: 999;
            height: 100px;
            li {
                text-align: center;
                flex:1;
                border-bottom:1px solid #333;
                z-index: 999;

                &.selected {
                    position: relative;
                    b {
                        display: block;
                        margin: 0 auto;
                        width: 200px;
                        height: 8px;
                        background-color: #999;
                        position: absolute;
                        bottom: 0;
                        left: 80px;
                        // border-bottom: 8px solid #999;
                    }
                }
            }
        }
    }