jquery / jquery/jquerymobile.com
TypeError: Cannot read properties of undefined (reading 'concat') when using jQuery 3.x
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- Dominant language
- HTML
- Stars
- 57
- Forks
- 69
- PR merge metrics
- No merged PRs in 30d
Description
Error:
Cannot read properties of undefined (reading 'concat')
I'm using jquery 3.3.1 and I've tried 3.6.1 also
jquery mobile is 1.4.5
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
The report names no files, tests, or reproduction, only jQuery 3.3.1/3.6.1 and jQuery Mobile 1.4.5. Start by creating a minimal reproduction for the undefined concat error with those versions, then identify the failing project entry point. Done means the cause is confirmed and a regression test or documented compatibility result covers the issue.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- jquery
- Domain
- frontend
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 20/100