Element: [Bug, Report], Uncaught, TypeError:, Cannot, read, property,'prototype', undefined, of

Created on 2 Jul 2017 · 11Comments · Source: ElemeFE/element

Element UI version

1.3.7

OS/Browsers version

windows7/google chrome 59.0.3071.115（正式版本）（32 位）

Vue version

2.3.4

Reproduction Link

https://codepen.io/Quieterwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww/pen/awYqgN

Steps to reproduce

页面中引入index.js，其他什么都不需要做，就会报错

What is Expected?

不报错

What is actually happening?

报错:Uncaught TypeError: Cannot read property 'prototype' of undefined

Source

anrananran

Most helpful comment

不是版本问题，应该是引入顺序错了，把vue.js引用放在index.js前面就好了

JesseJia on 4 Sep 2018

👍4

All 11 comments

Translation of this issue:

Element UI version

1.3.7

OS/Browsers version

Windows7/google chrome 59.0.3071.115 (official version) (32 bits)

Vue version

2.3.4

Reproduction Link

https://codepen.io/Quieterwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww/pen/awYqgN

Steps to reproduce

Index.js is introduced into the page, and nothing else needs to be done

What is Expected?

Error free

What is actually happening?

Error: Uncaught, TypeError:, Cannot, read, property,'prototype', of, undefined

element-bot on 2 Jul 2017

找到原因了，自己的问题

anrananran on 2 Jul 2017

😕1 👎1

什么原因，我也遇到类似的问题，vue-cli新建的项目刚引入element报错：

index.js:2 Uncaught TypeError: Cannot read property 'prototype' of undefined
at Object.t.__esModule (index.js:2)
at t (index.js:1)
at Object.t.__esModule (index.js:2)
at t (index.js:1)
at Object.t.__esModule (index.js:2)
at t (index.js:1)
at Object.t.__esModule (index.js:2)
at t (index.js:1)
at Object.t.__esModule (index.js:2)
at t (index.js:1)

feichangtutu on 1 Aug 2017

I have the same issue.
Vue 2.8.2
Element-ui 1.4.3

Uncaught TypeError: Cannot read property 'prototype' of undefined
at Object.t.__esModule (index.js:2)
at t (index.js:1)
at Object.t.__esModule (index.js:2)
at t (index.js:1)
at Object.t.__esModule (index.js:2)
at t (index.js:1)
at Object.t.__esModule (index.js:2)
at t (index.js:1)
at Object.t.__esModule (index.js:2)
at t (index.js:1)

VitaliyPetroff on 3 Sep 2017

property 'prototype' of undefined 为啥黎？

GoogleCodes on 8 Jan 2018

卧槽，什么原因，说一下啊大哥。我在vue中的 index.html刚刚引入就报错

dh360 on 22 May 2018

@dinghao1994 看看是不是引入的vue版本不对

anrananran on 23 May 2018

版本是 2.9.3 应该不是版本问题吧

dh360 on 24 May 2018

不是版本问题，应该是引入顺序错了，把vue.js引用放在index.js前面就好了

JesseJia on 4 Sep 2018

👍4

vuejs的文件引入需要在element-ui的index.js文件前面

gdmec07140726 on 11 Jan 2019

正如 @JesseJia 和 @gdmec07140726 说的，引入顺序问题。我是 rails 写了嵌套模版，里层引入 element-ui，外层引入 vue，但是渲染顺序写反了

<head>
  <%= stylesheet_link_tag    'v2/element-ui', media: 'all' %>
  <%= javascript_include_tag 'v2/element-ui' %>
</head>

<%= render template: "layouts/v2/application" %> <%#引入 vue%>

顺序调整一下就好了

<%= render template: "layouts/v2/application" %> <%#引入 vue%>

<head>
  <%= stylesheet_link_tag    'v2/element-ui', media: 'all' %>
  <%= javascript_include_tag 'v2/element-ui' %>
</head>