SOURCE

<div id="app" v-cloak>
    <div class="mian" v-clickouteside="handleClose">
        <button @click="show = !show">点击显示下拉菜单</button>
        <div class="dropdown" v-show="show">
            <p>下拉框的内容，点击外面区域可以关闭</p>
        </div>
    </div>
</div>
<script>
      Vue.directive('clickouteside',{
        bind:function(el,binding,vnode){
            function documentHandler(e){
                if(el.contains(e.target)){
                        return false
                }
                if(binding.expression){
                    binding.value(e)
                }
            }
            el.__vueClickOutside__ = documentHandler
            document.addEventListener('click',documentHandler)
        },
        unbind:function(el,binding){
            document.removeEventListener('click',el.__vueClickOutside__)
            delete el.__vueClickOutside__
        }

    })
    const app = new Vue({
        el:'#app',
        data:{
            show:false
        },
        methods:{
            handleClose:function(){
                console.log('show',this.show)
                this.show = false
            }
        }
    })
  

</script>

html, body{
    margin: 0;
    padding: 0;
    height: 100%;
    color: #657180;
    font-size: 16px;
}
.daily-menu{
    width: 150px;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    overflow: auto;
    background: #f5f7f9;
}
.daily-menu-item{
    font-size: 18px;
    text-align: center;
    margin: 5px 0;
    padding: 10px 0;
    cursor: pointer;
    border-right: 2px solid transparent;
    transition: all .3s ease-in-out;
}
.daily-menu-item:hover{
    background: #e3e8ee;
}
.daily-menu-item.on{
    border-right: 2px solid #3399ff;
}

.daily-menu ul{
    list-style: none;
}
.daily-menu ul li a{
    display: block;
    color: inherit;
    text-decoration: none;
    padding: 5px 0;
    margin: 5px 0;
    cursor: pointer;
}
.daily-menu ul li a:hover, .daily-menu ul li a.on{
    color: #3399ff;
}

.daily-list{
    width: 300px;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 150px;
    overflow: auto;
    border-right: 1px solid #d7dde4;
}
.daily-date{
    text-align: center;
    margin: 10px 0;
}
.daily-item{
    display: block;
    color: inherit;
    text-decoration: none;
    padding: 16px;
    overflow: hidden;
    cursor: pointer;
    transition: all .3s ease-in-out;
}
.daily-item:hover{
    background: #e3e8ee;
}
.daily-img{
    width: 80px;
    height: 80px;
    float: left;
}
.daily-img img{
    width: 100%;
    height: 100%;
    border-radius: 3px;
}
.daily-title{
    padding: 10px 5px 10px 90px;
}
.daily-title.noImg{
    padding-left: 5px;
}
.daily-article{
    margin-left: 450px;
    padding: 20px;
}
.daily-article-title{
    font-size: 28px;
    font-weight: bold;
    color: #222;
    padding: 10px 0;
}

.view-more a{
    display: block;
    cursor: pointer;
    background: #f5f7f9;
    text-align: center;
    color: inherit;
    text-decoration: none;
    padding: 4px 0;
    border-radius: 3px;
}

.daily-comments{
    margin: 10px 0;
}
.daily-comments span{
    display: block;
    margin: 10px 0;
    font-size: 20px;
}
.daily-comment{
    overflow: hidden;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px dashed #e3e8ee;
}
.daily-comment-avatar{
    width: 50px;
    height: 50px;
    float: left;
}
.daily-comment-avatar img{
    width: 100%;
    height: 100%;
    border-radius: 3px;
}
.daily-comment-content{
    margin-left: 65px;
}
.daily-comment-name{

}
.daily-comment-time{
    color: #9ea7b4;
    font-size: 14px;
    margin-top: 5px;
}
.daily-comment-text{
    margin-top: 10px;
}