引入 element-ui 报错

报错内容

element-ui.common.js:338 Uncaught Error: Cannot find module 'async-validator'
  at webpackMissingModule (element-ui.common.js:338:1)
  at Object.eval (element-ui.common.js:338:1)
  at webpack_require (element-ui.common.js:21:1)
  at Module.eval (element-ui.common.js:23393:1)
  at webpack_require (element-ui.common.js:21:1)
  at Object.eval (element-ui.common.js:368:1)
  at webpack_require (element-ui.common.js:21:1)
  at eval (element-ui.common.js:85:1)
  at eval (element-ui.common.js:88:1)
  at ./node_modules/element-ui/lib/element-ui.common.js (app.js:2907:1)

原因：

通过 https://github.com/vuejs/vuepress/issues/2275 (opens new window) 发现，element-ui 依赖 core-js 的 2.x 版本，而 web 项目依赖 core-js 的 3.x 版本导致的

解决办法：

npm install async-validator@1.11.5