提升常用方法至全局

src/main.js

@@ -1,6 +1,13 @@
 import Vue from 'vue'
 import ElementUI from 'element-ui'
 
+import dayjs from 'dayjs'
+import numeral from 'numeral'
+import lodash from 'lodash'
+import qs from 'qs'
+
+import * as constant from '@/constant'
+
 import 'normalize.css/normalize.css' // A modern alternative to CSS resets
 import 'default-passive-events'
 import 'babel-polyfill'
@@ -104,6 +111,17 @@ Vue.mixin({
   computed: {
     selects() {
       return store.state.selects
+    },
+    $helpers() {
+      return {
+        dayjs,
+        numeral,
+        lodash,
+        qs,
+      }
+    },
+    $constant() {
+      return constant
     }
   },
   methods: {