Despite being asynchronous it contains a single linear schedule and two callbacks. The obvious outcome is two layered constructors, and a single top level API object with two custom events.
You couldn't describe what was going on in an equivalent functional construction of a react version unless you first head off on a diatribe about signals/hooks/state-management-disaster-du-jour, the choice of use of which would have implications to both the event handlers in some way - though they likely couldn't be in-place here, they'd have to be passed down from parent context in a giant dance of inversion of control. At runtime the outcome would likely get parsed twice (once for shadow, once for insertion) if not more times under certain compositions. Here the jquery is almost incidental, and could be quickly replaced by something else - for example want to swap out htmx here, well, just add the markers to the DOM, delete the jquery lines and you're done. You'd probably need to spend at least an hour figuring out if you could fit something independent and platform-native into your react code base, hell I've seen people burn weeks on it.
You couldn't describe what was going on in an equivalent functional construction of a react version unless you first head off on a diatribe about signals/hooks/state-management-disaster-du-jour, the choice of use of which would have implications to both the event handlers in some way - though they likely couldn't be in-place here, they'd have to be passed down from parent context in a giant dance of inversion of control. At runtime the outcome would likely get parsed twice (once for shadow, once for insertion) if not more times under certain compositions. Here the jquery is almost incidental, and could be quickly replaced by something else - for example want to swap out htmx here, well, just add the markers to the DOM, delete the jquery lines and you're done. You'd probably need to spend at least an hour figuring out if you could fit something independent and platform-native into your react code base, hell I've seen people burn weeks on it.