perf[Breadcrumb]: refine getBreadcrumb function

src/components/Breadcrumb/index.vue

@@ -31,16 +31,23 @@ export default {
   methods: {
     generateTitle,
     getBreadcrumb() {
-      // only show routes with name
-      let matched = this.$route.matched.filter(item => item.name)
-
+      // only show routes with meta.title
+      let matched = this.$route.matched.filter(item => item.meta && item.meta.title)
       const first = matched[0]
-      if (first && first.name.trim().toLocaleLowerCase() !== 'Dashboard'.toLocaleLowerCase()) {
+
+      if (!this.isDashboard(first)) {
         matched = [{ path: '/dashboard', meta: { title: 'dashboard' }}].concat(matched)
       }
 
       this.levelList = matched.filter(item => item.meta && item.meta.title && item.meta.breadcrumb !== false)
     },
+    isDashboard(route) {
+      const name = route && route.name
+      if (!name) {
+        return false
+      }
+      return name.trim().toLocaleLowerCase() === 'Dashboard'.toLocaleLowerCase()
+    },
     pathCompile(path) {
       // To solve this problem https://github.com/PanJiaChen/vue-element-admin/issues/561
       const { params } = this.$route