I am learning vue-loader, and according to the method in the video,
I created a new file
1 index.html

2 main.js

import Vue from "vue";

3 webpack.config.js

module.exports={ entry:'./main.js', output:{ path:__dirname, filename:"build.js" } }

4 Empty App.vue file

5 After passing npm init, scripts was changed to the execution command

6 Downloaded webpck webpack-dev-server through cnpm install webpack webpack-dev-server

After finally passing npm run dev, the error is reported as follows

ERROR in ./main.js
Module not found: Error: Can't resolve 'vue' in '....vue-loader-demo'
@./main.js 1:0 -22
@multi ./~/_webpack-dev-server@2.4.5@webpack-dev-server/client?http://localhost:8081 webpack/hot/dev-server ./main.js
webpack:Failed to compile.

Kneel down and thank you all, waiting online