方式一：

通過cnpm安裝node-sass

 cnpm install node-sass --save 

方式二：

通過npm 安裝

1、安裝sass-loader

 npm install sass-loader --save-dev 

2、安裝 node-sass

 npm install node-sass --save-dev

如若不安裝node-sass ，會出現如下錯誤：

ERROR  Failed to compile with 1 errors                                                                                                                                              3:13:52 PM
 

 error  in ./src/styles/index.scss

 Module build failed (from ./node_modules/sass-loader/dist/cjs.js):

 Error: Cannot find module 'node-sass'

     at Function.Module._resolveFilename (internal/modules/cjs/loader.js:636:15)

     at Function.Module._load (internal/modules/cjs/loader.js:562:25)

     at Module.require (internal/modules/cjs/loader.js:692:17)
 

     at require (internal/modules/cjs/helpers.js:25:18)

     at getDefaultSassImplementation (D:\WebStormProject\tourism-supervision-service-platform\node_modules\sass-loader\dist\getDefaultSassImplementation.js:24:10)

     at getSassImplementation (D:\WebStormProject\tourism-supervision-service-platform\node_modules\sass-loader\dist\getSassImplementation.js:19:72)
 

     at Object.loader (D:\WebStormProject\tourism-supervision-service-platform\node_modules\sass-loader\dist\index.js:40:61)

 @ ./src/styles/index.scss 4:14-225 14:3-18:5 15:22-233

  @ ./src/main.js

  @ multi (webpack)-dev-server/client?http://localhost:9999/sockjs-node (webpack)/hot/dev-server.js ./src/main.js