Drag & drop (libraries)
summary
Tried two Ember add‑ons, then builds a custom wrapper around Sortable.js to recreate the React hook feel: ordered callbacks, group sorting, disabled items and no DOM-level HTML fiddling. Hits a critical bug: mismatched DOM vs data when lists live in separate components so moved items become “lost.” Switches to Dracula, a single component with children approach that requires a small cache and sync step and that reliably keeps DOM and data consistent.
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