sass-loader安装+Failed to resolve loader: sass-loader You may need to install it.解决方法

通过 cnpm 安装node-sass

cnpm install node-sass --save

方式二：

通过npm 安装

        1、安装sass-loader

npm install sass-loader --save-dev

        2、安装 node-sass

npm install node-sass --save-dev

        如若不安装node-sass ，会出现如下错误：

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?:9999/sockjs-node (webpack)/hot/dev-server.js ./src/main.js