index.vue
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<template>
<el-menu
:default-active="activeMenu"
mode="horizontal"
@select="handleSelect"
>
<template v-for="(item, index) in topMenus">
<el-menu-item :style="{'--theme': theme}" :index="item.path" :key="index" v-if="index < visibleNumber"
><svg-icon :icon-class="item.meta.icon" />
{{ item.meta.title }}</el-menu-item
>
</template>
<!-- 顶部菜单超出数量折叠 -->
<el-submenu :style="{'--theme': theme}" index="more" v-if="topMenus.length > visibleNumber">
<template slot="title">更多菜单</template>
<template v-for="(item, index) in topMenus">
<el-menu-item
:index="item.path"
:key="index"
v-if="index >= visibleNumber"
><svg-icon :icon-class="item.meta.icon" />
{{ item.meta.title }}</el-menu-item
>
</template>
</el-submenu>
</el-menu>
</template>
<script>
import { constantRoutes } from "@/router";
export default {
data() {
return {
// 顶部栏初始数
visibleNumber: 5,
// 是否为首次加载
isFrist: false,
// 当前激活菜单的 index
currentIndex: undefined
};
},
computed: {
theme() {
return this.$store.state.settings.theme;
},
// 顶部显示菜单
topMenus() {
let topMenus = [];
this.routers.map((menu) => {
if (menu.hidden !== true) {
// 兼容顶部栏一级菜单内部跳转
if (menu.path === "/") {
topMenus.push(menu.children[0]);
} else {
topMenus.push(menu);
}
}
});
return topMenus;
},
// 所有的路由信息
routers() {
return this.$store.state.permission.topbarRouters;
},
// 设置子路由
childrenMenus() {
var childrenMenus = [];
this.routers.map((router) => {
for (var item in router.children) {
if (router.children[item].parentPath === undefined) {
if(router.path === "/") {
router.children[item].path = "/redirect/" + router.children[item].path;
} else {
if(!this.ishttp(router.children[item].path)) {
router.children[item].path = router.path + "/" + router.children[item].path;
}
}
router.children[item].parentPath = router.path;
}
childrenMenus.push(router.children[item]);
}
});
return constantRoutes.concat(childrenMenus);
},
// 默认激活的菜单
activeMenu() {
const path = this.$route.path;
let activePath = this.defaultRouter();
if (path.lastIndexOf("/") > 0) {
const tmpPath = path.substring(1, path.length);
activePath = "/" + tmpPath.substring(0, tmpPath.indexOf("/"));
} else if ("/index" == path || "" == path) {
if (!this.isFrist) {
this.isFrist = true;
} else {
activePath = "index";
}
}
var routes = this.activeRoutes(activePath);
if (routes.length === 0) {
activePath = this.currentIndex || this.defaultRouter()
this.activeRoutes(activePath);
}
return activePath;
},
},
beforeMount() {
window.addEventListener('resize', this.setVisibleNumber)
},
beforeDestroy() {
window.removeEventListener('resize', this.setVisibleNumber)
},
mounted() {
this.setVisibleNumber();
},
methods: {
// 根据宽度计算设置显示栏数
setVisibleNumber() {
const width = document.body.getBoundingClientRect().width / 3;
this.visibleNumber = parseInt(width / 85);
},
// 默认激活的路由
defaultRouter() {
let router;
Object.keys(this.routers).some((key) => {
if (!this.routers[key].hidden) {
router = this.routers[key].path;
return true;
}
});
return router;
},
// 菜单选择事件
handleSelect(key, keyPath) {
this.currentIndex = key;
if (this.ishttp(key)) {
// http(s):// 路径新窗口打开
window.open(key, "_blank");
} else if (key.indexOf("/redirect") !== -1) {
// /redirect 路径内部打开
this.$router.push({ path: key.replace("/redirect", "") });
} else {
// 显示左侧联动菜单
this.activeRoutes(key);
}
},
// 当前激活的路由
activeRoutes(key) {
var routes = [];
if (this.childrenMenus && this.childrenMenus.length > 0) {
this.childrenMenus.map((item) => {
if (key == item.parentPath || (key == "index" && "" == item.path)) {
routes.push(item);
}
});
}
if(routes.length > 0) {
this.$store.commit("SET_SIDEBAR_ROUTERS", routes);
}
return routes;
},
ishttp(url) {
return url.indexOf('http://') !== -1 || url.indexOf('https://') !== -1
}
},
};
</script>
<style lang="scss">
.topmenu-container.el-menu--horizontal > .el-menu-item {
float: left;
height: 50px !important;
line-height: 50px !important;
color: #999093 !important;
padding: 0 5px !important;
margin: 0 10px !important;
}
.topmenu-container.el-menu--horizontal > .el-menu-item.is-active, .el-menu--horizontal > .el-submenu.is-active .el-submenu__title {
border-bottom: 2px solid #{'var(--theme)'} !important;
color: #303133;
}
/* submenu item */
.topmenu-container.el-menu--horizontal > .el-submenu .el-submenu__title {
float: left;
height: 50px !important;
line-height: 50px !important;
color: #999093 !important;
padding: 0 5px !important;
margin: 0 10px !important;
}
</style>