fix[Charts]: fixed charts resize mixins bug #1285 (#1290)

src/components/Charts/mixins/resize.js

 import { debounce } from '@/utils'
 
 export default {
+  data() {
+    return {
+      sidebarElm: null
+    }
+  },
   mounted() {
     this.__resizeHandler = debounce(() => {
       if (this.chart) {
@@ -9,14 +14,13 @@ export default {
     }, 100)
     window.addEventListener('resize', this.__resizeHandler)
 
-    const sidebarElm = document.getElementsByClassName('sidebar-container')[0]
-    sidebarElm.addEventListener('transitionend', this.sidebarResizeHandler)
+    this.sidebarElm = document.getElementsByClassName('sidebar-container')[0]
+    this.sidebarElm && this.sidebarElm.addEventListener('transitionend', this.sidebarResizeHandler)
   },
   beforeDestroy() {
     window.removeEventListener('resize', this.__resizeHandler)
 
-    const sidebarElm = document.getElementsByClassName('sidebar-container')[0]
-    sidebarElm.removeEventListener('transitionend', this.sidebarResizeHandler)
+    this.sidebarElm && this.sidebarElm.removeEventListener('transitionend', this.sidebarResizeHandler)
   },
   methods: {
     sidebarResizeHandler(e) {

src/views/dashboard/admin/components/LineChart.vue

@@ -32,7 +32,8 @@ export default {
   },
   data() {
     return {
-      chart: null
+      chart: null,
+      sidebarElm: null
     }
   },
   watch: {
@@ -55,8 +56,8 @@ export default {
     }
 
     // 监听侧边栏的变化
-    const sidebarElm = document.getElementsByClassName('sidebar-container')[0]
-    sidebarElm.addEventListener('transitionend', this.sidebarResizeHandler)
+    this.sidebarElm = document.getElementsByClassName('sidebar-container')[0]
+    this.sidebarElm && this.sidebarElm.addEventListener('transitionend', this.sidebarResizeHandler)
   },
   beforeDestroy() {
     if (!this.chart) {
@@ -66,8 +67,7 @@ export default {
       window.removeEventListener('resize', this.__resizeHandler)
     }
 
-    const sidebarElm = document.getElementsByClassName('sidebar-container')[0]
-    sidebarElm.removeEventListener('transitionend', this.sidebarResizeHandler)
+    this.sidebarElm && this.sidebarElm.removeEventListener('transitionend', this.sidebarResizeHandler)
 
     this.chart.dispose()
     this.chart = null