npm WARN extract-text-webpack-plugin@4.0.0-beta.0 requires a peer of webpack@^3.0.0 || ^4.0.0 but none is installed. You must install peer dependencies yourself.
解決方法:
npm install webpack@^4.0.0
npm WARN extract-text-webpack-plugin@4.0.0-beta.0 requires a peer of webpack@^3.0.0 || ^4.0.0 but none is installed. You must install peer dependencies yourself.
解決方法:
npm install webpack@^4.0.0