在执行npm run dev 时出现错误：_vueRouter2.default is not

Question

在执行npm run dev时出现_vueRouter2.default is not a constructorUncaught TypeError: _vueRouter2.default is not a constructor    at Object.eval (eval at <anonymous> (build.js:1195), <anonymous>:64:14)    at eval (eval at <anonymous> (build.js:1195), <anonymous>:93:30)    at Object.<anonymous> (build.js:1195)    at __webpack_require__ (build.js:654)    at fn (build.js:84)    at Object.<anonymous> (build.js:1989)    at __webpack_require__ (build.js:654)    at build.js:701    at build.js:704

Answer 1

我的问题已经解决了，你看一下你的是不是也是这个原因。
在webpack配置文件webpack.config.js文件中，config={}里面有一个参数是resolve：

resolve: {

      alias: {

          'vue$': 'vue/dist/vue.js'

      }

  },

这里缺少vue-router，加进去即可。

resolve: {

      alias: {

          'vue$': 'vue/dist/vue.js',

          'vue-router$': 'vue-router/dist/vue-router.common.js'

      }

  },