[5.2] Fix Multilingual Associations Infinite Loop

[MatMyfta]

Pull Request for Issue #44224

Summary of Changes

This update implements conditional checks to verify the existence of specified variables before accessing or modifying their values. This enhancement prevents potential runtime errors associated with null or undefined variables.

Testing Instructions

Described in the issue

Actual result BEFORE applying this Pull Request

Described in the issue

Expected result AFTER applying this Pull Request

• Console errors related to variable access will be resolved.
• The infinite loop that previously caused the administration console to become unresponsive is eliminated.

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[newtastic]

I have tested this item ✅ successfully on 2b457d3

I tested this with J5.2.0 Stable and it works like excepted now!

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[fgsw]

Test by using prebuilt package:

Uncaught TypeError: n.querySelector(...) is null
    <anonymous> https://j44360:8890/media/com_associations/js/sidebyside.min.js?983476:4
    <anonymous> https://j44360:8890/media/com_associations/js/sidebyside.min.js?983476:4

[MatMyfta]

What prebuilt package are you testing?
The changes are made on the build directory, so all the resources in media have to be rebuild with the new changes.

[fgsw]

The changes are made on the build directory

Had only looked at the prebuild package at the end of the Pull Request and not at the Directory-Path if it contain build.

Would be better in cases like this to not offer prebuilt packages.

[Quy]

Installed the pre-built package:

[Quy]

Still an issue:

[Quy]

[Quy]

I have tested this item ✅ successfully on cdad048

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[viocassel]

I have tested this item ✅ successfully on cdad048

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[richard67]

RTC

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