There's a couple places in GCV that use jQuery. I did this because it was a dependency of Bootstrap anyway, so when in Rome... However, Bootstrap 5 dropped jQuery as a dependency and it's now hard to justify keeping it around given how little it's actually used in the project.
PR #852 updated all relevant code to no longer use jQuery. Golden Layout is now the only code that depends on jQuery. When Golden Layout is updated to version 2 (issue #369) then jQuery will no longer be required.
There's a couple places in GCV that use jQuery. I did this because it was a dependency of Bootstrap anyway, so when in Rome... However, Bootstrap 5 dropped jQuery as a dependency and it's now hard to justify keeping it around given how little it's actually used in the project.