Create-react-app V2 변경 적용사항.

 

index.js [serviceWorker]

import * as serviceWorker from './serviceWorker';

serviceWorker.register ();

 

 

webpack.config.js

            {
              test: sassRegex,
              exclude: sassModuleRegex,
              use: getStyleLoaders(
                {
                  importLoaders: 2,
                  sourceMap: isEnvProduction && shouldUseSourceMap,
                },
                'sass-loader'
              ),
              sideEffects: true,
            },

해당부분 아래와 같이 변경.

            {
              test: sassRegex,
              exclude: sassModuleRegex,
              use: getStyleLoaders({
                importLoaders: 2,
                sourceMap: isEnvProduction && shouldUseSourceMap
              }).concat({
                loader: require.resolve('sass-loader'),
                options: {
                  includePaths: [paths.appSrc + '/styles'],
                  sourceMap: isEnvProduction && shouldUseSourceMap
                }
              }),
              // Don't consider CSS imports dead code even if the
              // containing package claims to have no side effects.
              // Remove this when webpack adds a warning or an error for this.
              // See https://github.com/webpack/webpack/issues/6571
              sideEffects: true
            },