Issue with 8.4.0 due to PR #5954

[fiveable-jferg]

Check that this is really a bug

• I confirm

Reproduction link

Will create a repro if needed.

Bug description

The code in https://github.com/nolimits4web/swiper/pull/5954/files#diff-88a223b4c7649642379e3d1da5338dc2432bbe32b5787cfcda0b484fce3e3786 is causing me issues because there is a circumstance where displayName is null, and since there is no check for && child.type.displayName in the if statement, I'm getting a Cannot read property 'includes' of undefined when that situation is encountered.

Expected Behavior

Check succeeds without error.

Actual Behavior

TypeError: Cannot read property 'includes' of undefined

Swiper version

8.4.0

Platform/Target and Browser Versions

React

Validations

• Follow our Code of Conduct
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.
• Make sure this is a Swiper issue and not a framework-specific issue

Would you like to open a PR for this bug?

• I'm willing to open a PR

[serdarjan1995]

I can confirm the issue is valid, as quick workaround we had to use swiper 8.3.2 version.

[jablonski]

Same problem here...

TypeError: e.type.displayName is undefined

[fiveable-jferg]

Thanks for the quick response!