VUE环境搭建前几步骤可以看博客

报错信息如下：

PS H:\UI\VUE\my-project-first> npm run dev

> my-project-first@1.0.0 dev H:\UI\VUE\my-project-first
> webpack-dev-server --inline --progress --config build/webpack.dev.conf.js

 94% asset optimization

 ERROR  Failed to compile with 2 errors                                                                         08:56:42

 error  in ./src/App.vue

Module build failed: Error: Cannot find module 'prettier'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:581:15)
    at Function.Module._load (internal/modules/cjs/loader.js:507:25)
    at Module.require (internal/modules/cjs/loader.js:637:17)
    at require (internal/modules/cjs/helpers.js:20:18)
    at Object.<anonymous> (H:\UI\VUE\my-project-first\node_modules\_vue-loader@13.7.3@vue-loader\lib\template-compiler\index.js:1:80)
    at Module._compile (internal/modules/cjs/loader.js:689:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
    at Module.load (internal/modules/cjs/loader.js:599:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
    at Function.Module._load (internal/modules/cjs/loader.js:530:3)
    at Module.require (internal/modules/cjs/loader.js:637:17)
    at require (internal/modules/cjs/helpers.js:20:18)
    at loadLoader (H:\UI\VUE\my-project-first\node_modules\_loader-runner@2.4.0@loader-runner\lib\loadLoader.js:18:17)
    at iteratePitchingLoaders (H:\UI\VUE\my-project-first\node_modules\_loader-runner@2.4.0@loader-runner\lib\LoaderRunner.js:169:2)
    at runLoaders (H:\UI\VUE\my-project-first\node_modules\_loader-runner@2.4.0@loader-runner\lib\LoaderRunner.js:365:2)
    at NormalModule.doBuild (H:\UI\VUE\my-project-first\node_modules\_webpack@3.12.0@webpack\lib\NormalModule.js:182:3)

 @ ./src/App.vue 11:0-392
 @ ./src/main.js
 @ multi ./node_modules/_webpack-dev-server@2.11.3@webpack-dev-server/client?http://localhost:8080 webpack/hot/dev-server ./src/main.js

 error  in ./src/components/HelloWorld.vue

Module build failed: Error: Cannot find module 'prettier'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:581:15)
    at Function.Module._load (internal/modules/cjs/loader.js:507:25)
    at Module.require (internal/modules/cjs/loader.js:637:17)
    at require (internal/modules/cjs/helpers.js:20:18)
    at Object.<anonymous> (H:\UI\VUE\my-project-first\node_modules\_vue-loader@13.7.3@vue-loader\lib\template-compiler\index.js:1:80)
    at Module._compile (internal/modules/cjs/loader.js:689:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
    at Module.load (internal/modules/cjs/loader.js:599:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
    at Function.Module._load (internal/modules/cjs/loader.js:530:3)
    at Module.require (internal/modules/cjs/loader.js:637:17)
    at require (internal/modules/cjs/helpers.js:20:18)
    at loadLoader (H:\UI\VUE\my-project-first\node_modules\_loader-runner@2.4.0@loader-runner\lib\loadLoader.js:18:17)
    at iteratePitchingLoaders (H:\UI\VUE\my-project-first\node_modules\_loader-runner@2.4.0@loader-runner\lib\LoaderRunner.js:169:2)
    at runLoaders (H:\UI\VUE\my-project-first\node_modules\_loader-runner@2.4.0@loader-runner\lib\LoaderRunner.js:365:2)
    at NormalModule.doBuild (H:\UI\VUE\my-project-first\node_modules\_webpack@3.12.0@webpack\lib\NormalModule.js:182:3)

 @ ./src/components/HelloWorld.vue 11:0-404
 @ ./src/router/index.js
 @ ./src/main.js
 @ multi ./node_modules/_webpack-dev-server@2.11.3@webpack-dev-server/client?http://localhost:8080 webpack/hot/dev-server ./src/main.js

可以参看链接，我直接在项目下，对prettier模块进行安装，

PS H:\UI\VUE\my-project-first> cnpm install prettier
√ Installed 1 packages
√ Linked 0 latest versions
√ Run 0 scripts
√ All packages installed (1 packages installed from npm registry, used 1s(network 1s), speed 1.38MB/s, json 1(7.65kB), tarball 1.94MB)

再输入npm run dev

PS H:\UI\VUE\my-project-first> npm run dev

> my-project-first@1.0.0 dev H:\UI\VUE\my-project-first
> webpack-dev-server --inline --progress --config build/webpack.dev.conf.js

 13% building modules 32/37 modules 5 active ...t-first\src\components\HelloWorld.vue{ parser: "babylon" } is deprecated; we now treat it as { parser: "bab 95% emitting

 DONE  Compiled successfully in 3615ms                                                                          08:57:18

 I  Your application is running here: http://localhost:8080

在浏览器中打开，http://localhost:8080即可看到页面来了。