I ask as alot of form fields e.g. datepickers use jQuery and would be cool for them to use pure javascript. Not sure of this is possible? or in the pipeline?
We are still using jQuery code in some extensions and in the Meta Box plugin to use the jQuery extensions like date picker. Rewriting all the code by vanilla JS would take a lot of time but it is not impossible. You can send your feedback here https://trello.com/b/OCOz26GM/meta-boxs-public-roadmap
and the development team will consider adding it to the roadmap.
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