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I can create package of react app for SharePoint online by using "gulp serve" and "gulp package-solution" commands. However, I want to create package by using Webpack. How can I achieve this?

  • Why do you need it? Normally you shouldn't use webpack directly in SPFx, everything is handled by SPFx build pipeline internally. – Sergei Sergeev Dec 17 '18 at 7:21
  • To implement tree shaking and features of webpack.. – RajeshSharepointGeek Dec 17 '18 at 7:34
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You can't create an SPFx package using webpack directly, however you have options to modify webpack configuration which is used by SPFx build pipeline internally.

Good reading here - Extending Webpack in the SharePoint Framework toolchain.
So theoretically you are able to modify some settings inside a webpack pipeline.
However, consider a few gotchas:

  • SPFx still uses webpack 3, thus you should use tree shaking features of webpack 3 (which are probably don't work as good as in 4.x version)

  • I'm not sure if in general, it's a good idea to change production-related settings for SPFx. From my perspective, it might lead to unexpected errors. Unfortunately, Microsoft doesn't provide clear information on this topic.

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