CustomHandler best practices

[ToHold]

Recently I wanted to add a delay before displaying the text of CooperativeGesturesHandler on smartphones, so I decided to create my own Handler that extends of CooperativeGesturesHandler :

import * as MapLibreGL from 'maplibre-gl';

class CooperativeGesturesHandler extends MapLibreGL.CooperativeGesturesHandler {
	private _touchmoveDelayer: boolean = false;
	private _touchmoveDelayerTiemout: number = null;

	constructor(map: MapLibreGL.Map, active: boolean) {
		super(map, active);
	}

	touchmove(e: TouchEvent) {
		if (e.touches.length !== 1) {
			this._touchmoveDelayer = true;
			clearTimeout(this._touchmoveDelayerTiemout);
			this._touchmoveDelayerTiemout = null;
		} else if (this._touchmoveDelayerTiemout == null && this._touchmoveDelayer){
			this._touchmoveDelayerTiemout = setTimeout(() => {
				this._touchmoveDelayer = false;
				this._touchmoveDelayerTiemout = null;
			}, 500);
		}

		this._onCooperativeGesture((!this._touchmoveDelayer) && e.touches.length === 1);
	}
}

export default CooperativeGesturesHandler;

But here comes the problem : when adding a new Handler this way :

const cooperativeGestures = new CooperativeGesturesHandler(map, true);
cooperativeGestures.enable();
map.cooperativeGestures = cooperativeGestures;
map.handlers._add("cooperativeGestures", cooperativeGestures );

I can't find a way to specify the order inside the HandlerManager._handlers array, I need to specify an order because handlers "touchPan", and "touchZoom" are blocking the "touchMove" event. I can add an allowed list to the "_add" method this way : map.handlers._add("cooperativeGestures", cooperativeGestures , ["touchPan", "touchZoom"]); but now because my custom handler is added at the end of HandlerManager._handlers "touchZoom" and "touchPan" are not blocked by my custom handler.

Well it works, but when it comes to edit other handlers it becomes harder, that's why I would love to have some advices, or the best practices to create my custom handlers.

By the way I would avoid to use HandlerManager._handlers or HandlerManager._handlersById, because in my mind prefixed by _ variables can be changed in new realeases, and I even don't know if it's a great idea to use map.handlers._add too.

Any advices would be appreciate :)

[ToHold]

Is there also a way to specify a custom HandlerManager._addDefaultHandlers function ?

[HarelM]

Most of the handler logic is internal, and too complicated if you ask me.
Some handlers are checking the state of other handler in some situations, I looked into it when fixing some bugs in the cooperative gesture handler.

Have you tried css' animation-delay?