perf[TagsView]: set the scrollPane as a business component (#1660)

src/views/layout/components/TagsView/ScrollPane.vue

@@ -14,16 +14,21 @@ export default {
       left: 0
     }
   },
+  computed: {
+    scrollWrapper() {
+      return this.$refs.scrollContainer.$refs.wrap
+    }
+  },
   methods: {
     handleScroll(e) {
       const eventDelta = e.wheelDelta || -e.deltaY * 40
-      const $scrollWrapper = this.$refs.scrollContainer.$refs.wrap
+      const $scrollWrapper = this.scrollWrapper
       $scrollWrapper.scrollLeft = $scrollWrapper.scrollLeft + eventDelta / 4
     },
     moveToTarget(currentTag) {
       const $container = this.$refs.scrollContainer.$el
       const $containerWidth = $container.offsetWidth
-      const $scrollWrapper = this.$refs.scrollContainer.$refs.wrap
+      const $scrollWrapper = this.scrollWrapper
       const tagList = this.$parent.$refs.tag
 
       let firstTag = null
@@ -44,6 +49,7 @@ export default {
         const currentIndex = tagList.findIndex(item => item === currentTag)
         const prevTag = tagList[currentIndex - 1]
         const nextTag = tagList[currentIndex + 1]
+
         // the tag's offsetLeft after of nextTag
         const afterNextTagOffsetLeft = nextTag.$el.offsetLeft + nextTag.$el.offsetWidth + tagAndTagSpacing
 

src/views/layout/components/TagsView/index.vue

@@ -26,7 +26,7 @@
 </template>
 
 <script>
-import ScrollPane from '@/components/ScrollPane'
+import ScrollPane from './ScrollPane'
 import { generateTitle } from '@/utils/i18n'
 import path from 'path'
 
@@ -90,7 +90,6 @@ export default {
           }
         }
       })
-
       return tags
     },
     initTags() {
@@ -115,12 +114,10 @@ export default {
         for (const tag of tags) {
           if (tag.to.path === this.$route.path) {
             this.$refs.scrollPane.moveToTarget(tag)
-
             // when query is different then update
             if (tag.to.fullPath !== this.$route.fullPath) {
               this.$store.dispatch('updateVisitedView', this.$route)
             }
-
             break
           }
         }
@@ -178,8 +175,8 @@ export default {
       } else {
         this.left = left
       }
-      this.top = e.clientY
 
+      this.top = e.clientY
       this.visible = true
       this.selectedTag = tag
     },

src/views/layout/components/index.js

@@ -1,4 +1,4 @@
 export { default as Navbar } from './Navbar'
 export { default as Sidebar } from './Sidebar/index.vue'
-export { default as TagsView } from './TagsView'
+export { default as TagsView } from './TagsView/index.vue'
 export { default as AppMain } from './AppMain'