Function observe

packages/base/src/delegate/ResizeHandler.ts:24–34

(element: HTMLElement, callback: ResizeObserverCallback)

};

const observe = (element: HTMLElement, callback: ResizeObserverCallback) => {
	const callbacks = observedElements.get(element) || [];

	// if no callbacks have been added for this element - start observing it
	if (!callbacks.length) {
		getResizeObserver().observe(element);
	}

	// save the callbacks in an array
	observedElements.set(element, [...callbacks, callback]);
};

const unobserve = (element: HTMLElement, callback: ResizeObserverCallback) => {
	const callbacks = observedElements.get(element) || [];