由于电脑重装系统了，导致启动vue项目报下面错误

@ ./node_modules/vue-style-loader??ref--8-oneOf-1-0!./node_modules/css-loader??                                                                                                                                  ref--8-oneOf-1-1!./node_modules/vue-loader/lib/loaders/stylePostLoader.js!./node                                                                                                                                  _modules/postcss-loader/src??ref--8-oneOf-1-2!./node_modules/sass-loader/dist/cj                                                                                                                                  s.js??ref--8-oneOf-1-3!./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_                                                                                                                                  modules/vue-loader/lib??vue-loader-options!./src/views/meizhuang/videoOne/lesson                                                                                                                                  Plan/index.vue?vue&type=style&index=0&id=85ab621a&lang=scss&scoped=true& 4:14-51                                                                                                                                  1 14:3-18:5 15:22-519
 @ ./src/views/meizhuang/videoOne/lessonPlan/index.vue?vue&type=style&index=0&id                                                                                                                                  =85ab621a&lang=scss&scoped=true&
 @ ./src/views/meizhuang/videoOne/lessonPlan/index.vue
 @ ./src/router/index.js
 @ ./src/main.js
 @ multi (webpack)-dev-server/client?http://192.168.4.26:9528/sockjs-node (webpa                                                                                                                                  ck)/hot/dev-server.js ./src/main.js

 error  in ./src/views/meizhuang/videoTwo/lessonPlan/index.vue?vue&type=style&in                                                                                                                                  dex=0&id=f3ac7266&lang=scss&scoped=true&

Module build failed (from ./node_modules/sass-loader/dist/cjs.js):
Error: Missing binding F:\vue-admin-template-master\node_modules\n                                                                                                                                  ode-sass\vendor\win32-x64-64\binding.node
Node Sass could not find a binding for your current environment: Windows 64-bit                                                                                                                                   with Node.js 10.x

Found bindings for the following environments:
  - Windows 64-bit with Node.js 12.x

This usually happens because your environment has changed since running `npm ins                                                                                                                                  tall`.
Run `npm rebuild node-sass` to download the binding for your current environment                                                                                                                                  .
    at module.exports (F:\vue-admin-template-master\node_modules\n                                                                                                                                  ode-sass\lib\binding.js:15:13)
    at Object.<anonymous> (F:\\vue-admin-template-master\node_modul                                                                                                                                  es\node-sass\lib\index.js:14:35)
    at Module._compile (internal/modules/cjs/loader.js:778:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)
    at Module.require (internal/modules/cjs/loader.js:692:17)
    at require (internal/modules/cjs/helpers.js:25:18)
    at getDefaultSassImpl (F:\\vue-admin-template-master\node_modul                                                                                                                                  es\sass-loader\dist\index.js:198:10)
    at Object.loader (F:\vue-admin-template-master\node_modules\sa                                                                                                                                  ss-loader\dist\index.js:80:29)

 @ ./node_modules/vue-style-loader??ref--8-oneOf-1-0!./node_modules/css-loader??                                                                                                                                  ref--8-oneOf-1-1!./node_modules/vue-loader/lib/loaders/stylePostLoader.js!./node                                                                                                                                  _modules/postcss-loader/src??ref--8-oneOf-1-2!./node_modules/sass-loader/dist/cj                                                                                                                                  s.js??ref--8-oneOf-1-3!./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_                                                                                                                                  modules/vue-loader/lib??vue-loader-options!./src/views/meizhuang/videoTwo/lesson                                                                                                                                  Plan/index.vue?vue&type=style&index=0&id=f3ac7266&lang=scss&scoped=true& 4:14-51                                                                                                                                  1 14:3-18:5 15:22-519
 @ ./src/views/meizhuang/videoTwo/lessonPlan/index.vue?vue&type=style&index=0&id                                                                                                                                  =f3ac7266&lang=scss&scoped=true&
 @ ./src/views/meizhuang/videoTwo/lessonPlan/index.vue
 @ ./src/router/index.js
 @ ./src/main.js
 @ multi (webpack)-dev-server/client?http://192.168.4.26:9528/sockjs-node (webpa                                                                                                                                  ck)/hot/dev-server.js ./src/main.js

 error  in ./src/views/login/index.vue?vue&type=style&index=0&lang=scss&

Module build failed (from ./node_modules/sass-loader/dist/cjs.js):
Error: Missing binding F:\vue-admin-template-master\node_modules\n                                                                                                                                  ode-sass\vendor\win32-x64-64\binding.node
Node Sass could not find a binding for your current environment: Windows 64-bit                                                                                                                                   with Node.js 10.x

Found bindings for the following environments:
  - Windows 64-bit with Node.js 12.x

This usually happens because your environment has changed since running `npm ins                                                                                                                                  tall`.
Run `npm rebuild node-sass` to download the binding for your current environment                                                                                                                                  .
    at module.exports (F:\vue-admin-template-master\node_modules\n                                                                                                                                  ode-sass\lib\binding.js:15:13)
    at Object.<anonymous> (F:\vue-admin-template-master\node_modul                                                                                                                                  es\node-sass\lib\index.js:14:35)
    at Module._compile (internal/modules/cjs/loader.js:778:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)
    at Module.require (internal/modules/cjs/loader.js:692:17)
    at require (internal/modules/cjs/helpers.js:25:18)
    at getDefaultSassImpl (F:\vue-admin-template-master\node_modul                                                                                                                                  es\sass-loader\dist\index.js:198:10)
    at Object.loader (F:\vue-admin-template-master\node_modules\sa                                                                                                                                  ss-loader\dist\index.js:80:29)

 @ ./node_modules/vue-style-loader??ref--8-oneOf-1-0!./node_modules/css-loader??                                                                                                                                  ref--8-oneOf-1-1!./node_modules/vue-loader/lib/loaders/stylePostLoader.js!./node                                                                                                                                  _modules/postcss-loader/src??ref--8-oneOf-1-2!./node_modules/sass-loader/dist/cj                                                                                                                                  s.js??ref--8-oneOf-1-3!./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_                                                                                                                                  modules/vue-loader/lib??vue-loader-options!./src/views/login/index.vue?vue&type=                                                                                                                                  style&index=0&lang=scss& 4:14-451 14:3-18:5 15:22-459
 @ ./src/views/login/index.vue?vue&type=style&index=0&lang=scss&
 @ ./src/views/login/index.vue
 @ ./src/router/index.js
 @ ./src/main.js
 @ multi (webpack)-dev-server/client?http://192.168.4.26:9528/sockjs-node (webpa                                                                                                                                  ck)/hot/dev-server.js ./src/main.js

 error  in ./src/views/meizhuang/videoThree/standard/index.vue?vue&type=style&in                                                                                                                                  dex=0&id=780f0392&lang=scss&scoped=true&

Module build failed (from ./node_modules/sass-loader/dist/cjs.js):
Error: Missing binding F:\vue-admin-template-master\node_modules\n                                                                                                                                  ode-sass\vendor\win32-x64-64\binding.node
Node Sass could not find a binding for your current environment: Windows 64-bit                                                                                                                                   with Node.js 10.x

报错显示说找不到node-sass，执行安装node-sass的命令却依然报错。

后面参考前辈经验才知道应该这么安装：cnpm install node-sass --save

安装成功之后就可以重新运行项目了。OK，问题解决。

附：安装cnpm的命令： npm install -g cnpm --registry=https://registry.npm.taobao.org