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Uncaught TypeError: Cannot read properties of undefined (reading 'lazyPreloaderClass') #7935

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6 tasks done
BerkeAras opened this issue Mar 28, 2025 · 2 comments · May be fixed by #7936
Open
6 tasks done

Uncaught TypeError: Cannot read properties of undefined (reading 'lazyPreloaderClass') #7935

BerkeAras opened this issue Mar 28, 2025 · 2 comments · May be fixed by #7936

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@BerkeAras
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Check that this is really a bug

  • I confirm

Reproduction link

https://codesandbox.io/p/devbox/swiper-default-forked-6c96g3?workspaceId=ws_NcfeSzfz6N96RJW7VKTnaL

Bug description

We are getting an error Uncaught TypeError: Cannot read properties of undefined (reading 'lazyPreloaderClass').

Due to our complex case (combining VueJS with other technologies) we cannot reproduce the issue.

Expected Behavior

No response

Actual Behavior

No response

Swiper version

11.2.6

Platform/Target and Browser Versions

macOS Arc Browser, same issue on Windows/Linux/iOS/Android and on other browsers too.

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
@BerkeAras BerkeAras linked a pull request Mar 28, 2025 that will close this issue
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@Scribilicious
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Yes, it’s a rare issue. I stumbled upon it as well. Hopefully, they accept your pull request or find another way to fix this issue, since it’s spamming my error log.

@BerkeAras
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BerkeAras commented Mar 28, 2025 •
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Yes, it’s a rare issue. I stumbled upon it as well. Hopefully, they accept your pull request or find another way to fix this issue, since it’s spamming my error log.

Could you find any fix until the PR is merged & released? @Scribilicious

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fix(element): Add existance Check for params on lazyPreloaderClass BerkeAras/swiper
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@Scribilicious @BerkeAras