修复不支持object.assign

Author: 李杰

README.md

@@ -4,7 +4,7 @@ StickyNav会在页面到达导航条位置的时候吸顶，超过父容器高
 
 ## Demo
 
-[Live demo](https://eijil.github.io/vue-sticky-nav/)
+[Live demo](http://vue-sticky-nav.surge.sh)
 
 ## install
 

dist/build.js

@@ -12,6 +12,7 @@
   },
   "dependencies": {
     "@tweenjs/tween.js": "^18.3.2",
+    "lodash": "^4.17.15",
     "vue": "^2.6.10",
     "vue-sticky-nav": "^1.1.9"
   },

package.json

@@ -49,8 +49,11 @@
 </template>
 
 <script>
-import {throttle} from "./throttle.js";
+
+import assign from 'lodash/assign';
+import throttle from 'lodash/throttle';
 import TWEEN from "@tweenjs/tween.js";
+
 const DEFAULT_OPTIONS = {
   zIndex: 1000,
   stickyTop: 0,
@@ -81,7 +84,7 @@ export default {
     }
   },
   created() {
-    this.stickyOptions = Object.assign({}, DEFAULT_OPTIONS, this.options);
+    this.stickyOptions = assign({}, DEFAULT_OPTIONS, this.options);
     this.navs = this.stickyOptions.navs;
   },
   watch: {