Mark `js-sys` as optional for identity_core

[frederikrothenberger]

Description of change

In #1397 my intention was to make the js-sys dependency mutually exclusive with the feature custom_time. As it turns out, it's not that simple and mixing target specific dependencies with feature specific dependencies does not actually work. See here and here.

So this removes the broken feature reference in the dependency declaration and instead marks it as optional. Also, the feature custom_time takes precedence over js-sys so these do not actually conflict and one could enable both.

Type of change

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• [x] Bug fix (a non-breaking change which fixes an issue)
• [ ] Enhancement (a non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Documentation Fix

How the change has been tested

Existing tests

Change checklist

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• [x] I have followed the contribution guidelines for this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes

[frederikrothenberger]

@itsyaasir: Sorry to bother you again, but I made a mistake in #1397 and this PR fixes it.

[itsyaasir]

@frederikrothenberger Thank you for your contribution! I noticed that in your changes, the js-sys dependency is marked as optional This means that the dependency won't be automatically included during the build process unless it is explicitly enabled (by feature IIRC). If you take a look at the github action which is building for wasm32-unknown-unkown it is failing to find the dep "js-sys" for the now_utc function. Since we are already compiling it conditionally according to the target, is the optional required here ?

[frederikrothenberger]

@itsyaasir: Yes, the optional is required, otherwise you cannot compile to wasm32-unknown-unknwon without it (breaking compatibility with the ICP platform).

But we should be able to enable it by default (still gated by the target). Would that be an option?

[itsyaasir]

@itsyaasir: Yes, the optional is required, otherwise you cannot compile to wasm32-unknown-unknwon without it (breaking compatibility with the ICP platform).

But we should be able to enable it by default (still gated by the target). Would that be an option?

That should be fine. We are also using the js-sys dependency for wasm bindings with ts

[frederikrothenberger]

@itsyaasir: I made it a default feature.

[itsyaasir]

@itsyaasir: I made it a default feature.

Did you forget to push the changes ? I can't see the dependency being a default feature.

You modified this default-features = true but this only activates the default features of the js-sys crate as show here

[frederikrothenberger]

@itsyaasir: Yes, my bad. I got confused about the default switches. Fixed now.