Hashed module ids by default

[smelukov]

Feature request

What is the expected behavior?

Consistent chunk hash

What is motivation or use case for adding/changing the behavior?

After this PR we have got worst long-term caching "out of the box" because modules id were changed very often (even if don't change these modules) and chunk hash was changed too (because modules id were in bootstrap code).

How should this be implemented in your opinion?

optimization.moduleIds: 'hashed' in prod-mode by default

Are you willing to work on this yourself?
yes

[ooflorent]

moduleIds: hashed is deprecated in the next branch in favor of deterministic.

[smelukov]

@ooflorent got it
I still think that moduleIds should be hashed deterministic by default

[smelukov]

If there are no objections then I would like to create PR

[ooflorent]

Sure! Then do it on next branch ;)

[smelukov]

Any ideas what’s wrong with tests? :)

[smelukov]

Is anyone can look at the test's error?
It fails in places that I didn't touch

[smelukov]

PR was merged 🎉

[smelukov]

moduleIds: hashed is deprecated in the next branch in favor of deterministic.

@ooflorent can you tell me please what's the biggest profit from using DeterministicModuleIdsPlugin instead of HashedModuleIdsPlugin? Why HashedModuleIdsPlugin will be deprecated in webpack 5?
Seems like these two are the same, but DeterministicModuleIdsPlugin generates a pure numeric ids