解决IE兼容性问题，降级simple-drawing-board 到1.4.1

package.json

@@ -34,10 +34,10 @@
     "nprogress": "0.2.0",
     "path-to-regexp": "2.4.0",
     "screenfull": "3.3.3",
-    "simple-drawing-board": "^2.0.1",
+    "simple-drawing-board": "1.4.1",
     "vue": "2.5.17",
     "vue-count-to": "1.0.13",
-    "vue-router": "^3.1.3",
+    "vue-router": "3.1.3",
     "vuex": "3.0.1",
     "wangeditor": ">=3.0.0",
     "xlsx": "^0.11.16"

src/main.js

@@ -21,12 +21,12 @@ Vue.use(mavonEditor)
 Vue.use(permission)
 Vue.use(ElementUI, { locale })
 Vue.config.productionTip = false
-require('babel-polyfill')
 
 const routerPush = Router.prototype.push
 Router.prototype.push = function push(location) {
   return routerPush.call(this, location).catch(error => error)
 }
+require('babel-polyfill')
 
 new Vue({
   el: '#app',