原命令
webpack .\src\main.js .\dist\bundle.js
报错
ERROR in multi ./src/main.js ./dist/bundle.js
Module not found: Error: Can’t resolve ‘.\dist\bundle.js’ in ‘C:\Users\Tecna1205\Desktop\vue\webpack-study’
@ multi ./src/main.js ./dist/bundle.js main[1]

当webpack版本到达4，需更换命令为
webpack .\src\main.js -o .\dist\bundle.js –mode development

这样就可以生成bundle.js了