ElementUI浅尝辄止32：NavMenu 导航菜单

为网站提供导航功能的菜单。常用于网站平台顶部或侧边栏菜单导航。

1.如何使用？顶栏

/*导航菜单默认为垂直模式，通过mode属性可以使导航菜单变更为水平模式。另外，在菜单中通过submenu组件可以生成二级菜单。Menu 还提供了background-color、text-color和active-text-color，分别用于设置菜单的背景色、菜单的文字颜色和当前激活菜单的文字颜色。*/<el-menu :default-active="activeIndex" class="el-menu-demo" mode="horizontal" @select="handleSelect"><el-menu-item index="1">处理中心</el-menu-item><el-submenu index="2"><template slot="title">我的工作台</template><el-menu-item index="2-1">选项1</el-menu-item><el-menu-item index="2-2">选项2</el-menu-item><el-menu-item index="2-3">选项3</el-menu-item><el-submenu index="2-4"><template slot="title">选项4</template><el-menu-item index="2-4-1">选项1</el-menu-item><el-menu-item index="2-4-2">选项2</el-menu-item><el-menu-item index="2-4-3">选项3</el-menu-item></el-submenu></el-submenu><el-menu-item index="3" disabled>消息中心</el-menu-item><el-menu-item index="4"><a href="https://www.ele.me" target="_blank">订单管理</a></el-menu-item>
</el-menu>
<div class="line"></div>
<el-menu:default-active="activeIndex2"class="el-menu-demo"mode="horizontal"@select="handleSelect"background-color="#545c64"text-color="#fff"active-text-color="#ffd04b"><el-menu-item index="1">处理中心</el-menu-item><el-submenu index="2"><template slot="title">我的工作台</template><el-menu-item index="2-1">选项1</el-menu-item><el-menu-item index="2-2">选项2</el-menu-item><el-menu-item index="2-3">选项3</el-menu-item><el-submenu index="2-4"><template slot="title">选项4</template><el-menu-item index="2-4-1">选项1</el-menu-item><el-menu-item index="2-4-2">选项2</el-menu-item><el-menu-item index="2-4-3">选项3</el-menu-item></el-submenu></el-submenu><el-menu-item index="3" disabled>消息中心</el-menu-item><el-menu-item index="4"><a href="https://www.ele.me" target="_blank">订单管理</a></el-menu-item>
</el-menu><script>export default {data() {return {activeIndex: '1',activeIndex2: '1'};},methods: {handleSelect(key, keyPath) {console.log(key, keyPath);}}}
</script>

2.侧栏

垂直菜单，可内嵌子菜单。

//通过el-menu-item-group组件可以实现菜单进行分组，分组名可以通过title属性直接设定，也可以通过具名 slot 来设定。<el-row class="tac"><el-col :span="12"><h5>默认颜色</h5><el-menudefault-active="2"class="el-menu-vertical-demo"@open="handleOpen"@close="handleClose"><el-submenu index="1"><template slot="title"><i class="el-icon-location"></i><span>导航一</span></template><el-menu-item-group><template slot="title">分组一</template><el-menu-item index="1-1">选项1</el-menu-item><el-menu-item index="1-2">选项2</el-menu-item></el-menu-item-group><el-menu-item-group title="分组2"><el-menu-item index="1-3">选项3</el-menu-item></el-menu-item-group><el-submenu index="1-4"><template slot="title">选项4</template><el-menu-item index="1-4-1">选项1</el-menu-item></el-submenu></el-submenu><el-menu-item index="2"><i class="el-icon-menu"></i><span slot="title">导航二</span></el-menu-item><el-menu-item index="3" disabled><i class="el-icon-document"></i><span slot="title">导航三</span></el-menu-item><el-menu-item index="4"><i class="el-icon-setting"></i><span slot="title">导航四</span></el-menu-item></el-menu></el-col><el-col :span="12"><h5>自定义颜色</h5><el-menudefault-active="2"class="el-menu-vertical-demo"@open="handleOpen"@close="handleClose"background-color="#545c64"text-color="#fff"active-text-color="#ffd04b"><el-submenu index="1"><template slot="title"><i class="el-icon-location"></i><span>导航一</span></template><el-menu-item-group><template slot="title">分组一</template><el-menu-item index="1-1">选项1</el-menu-item><el-menu-item index="1-2">选项2</el-menu-item></el-menu-item-group><el-menu-item-group title="分组2"><el-menu-item index="1-3">选项3</el-menu-item></el-menu-item-group><el-submenu index="1-4"><template slot="title">选项4</template><el-menu-item index="1-4-1">选项1</el-menu-item></el-submenu></el-submenu><el-menu-item index="2"><i class="el-icon-menu"></i><span slot="title">导航二</span></el-menu-item><el-menu-item index="3" disabled><i class="el-icon-document"></i><span slot="title">导航三</span></el-menu-item><el-menu-item index="4"><i class="el-icon-setting"></i><span slot="title">导航四</span></el-menu-item></el-menu></el-col>
</el-row><script>export default {methods: {handleOpen(key, keyPath) {console.log(key, keyPath);},handleClose(key, keyPath) {console.log(key, keyPath);}}}
</script>

 3.展开折叠

<el-radio-group v-model="isCollapse" style="margin-bottom: 20px;"><el-radio-button :label="false">展开</el-radio-button><el-radio-button :label="true">收起</el-radio-button>
</el-radio-group>
<el-menu default-active="1-4-1" class="el-menu-vertical-demo" @open="handleOpen" @close="handleClose" :collapse="isCollapse"><el-submenu index="1"><template slot="title"><i class="el-icon-location"></i><span slot="title">导航一</span></template><el-menu-item-group><span slot="title">分组一</span><el-menu-item index="1-1">选项1</el-menu-item><el-menu-item index="1-2">选项2</el-menu-item></el-menu-item-group><el-menu-item-group title="分组2"><el-menu-item index="1-3">选项3</el-menu-item></el-menu-item-group><el-submenu index="1-4"><span slot="title">选项4</span><el-menu-item index="1-4-1">选项1</el-menu-item></el-submenu></el-submenu><el-menu-item index="2"><i class="el-icon-menu"></i><span slot="title">导航二</span></el-menu-item><el-menu-item index="3" disabled><i class="el-icon-document"></i><span slot="title">导航三</span></el-menu-item><el-menu-item index="4"><i class="el-icon-setting"></i><span slot="title">导航四</span></el-menu-item>
</el-menu><style>.el-menu-vertical-demo:not(.el-menu--collapse) {width: 200px;min-height: 400px;}
</style><script>export default {data() {return {isCollapse: true};},methods: {handleOpen(key, keyPath) {console.log(key, keyPath);},handleClose(key, keyPath) {console.log(key, keyPath);}}}
</script>