Why not use HashedModuleIdsPlugin

[kwzm]

Is this a bug report?

No

I was curious about how create-react-app implements long cache, how do you control the file hashes to remain the same when adding or removing files, because I didn't see HashedModuleIdsPlugin added to the webpack configuration

[ianschmitz]

That's a good question. Reading their caching guide it seems to be the recommended approach.

It appears setting optimization.moduleIds: "hashed" will enable this plugin for us as well: https://github.com/webpack/webpack/blob/81cf088cd6a0231b94fa2399bd29294eccee1907/lib/WebpackOptionsApply.js#L362-L391.

Some other relevant info about a change to the default in webpack 5: webpack/webpack#8268 and https://github.com/webpack/changelog-v5/blob/master/README.md#deterministic-chunk-and-module-ids

[jiajianrong]

In webpack 4.3, [contenthash](https://github.com/webpack/webpack/releases/tag/v4.3.0) is introduced which I think it's supposed to replace HashedModuleIdsPlugin.

webpack prior to 4.3, only unstable thunkhash was prodived.