ElementUI之Vue warn: Unknown custom element: el-divider

"dependencies": {
    "axios": "^0.17.0",
    "element-ui": "^2.4.6",
    "moment": "^2.24.0",
    "screenfull": "^3.3.2",
    "vue": "^2.5.2",
    "vue-router": "^3.0.1",
    "vuex": "^3.0.1"
  },

• 升级element-ui的版本

  	卸载之前的element-ui版本    npm uninstall element-ui
  	安装想要安装的版本          npm install element-ui @2.0.7 -S
  	安装最新版                 npm install element-ui  -S
  

• 在main.js中修改新增的 theme-chalk 主题：
  将import 'element-ui/lib/theme-default/index.css’替换为
  import 'element-ui/lib/theme-chalk/index.css’

---

更新依赖后自动变为：

"dependencies": {
    "axios": "^0.17.0",
    "element-ui": "^2.13.0",
    "moment": "^2.24.0",
    "screenfull": "^3.3.2",
    "vue": "^2.5.2",
    "vue-router": "^3.0.1",
    "vuex": "^3.0.1"
  },