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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | 1x 1x 1x 4x 4x 1x 4x 4x 2x 1x 2x 2x 1x 1x 2x 2x 1x 2x | import { OverlayScrollbars } from 'overlayscrollbars';
const targets: Set<Element> = new Set();
const targetInstanceMap: WeakMap<Element, OverlayScrollbars> = new WeakMap();
/**
* Adds the given OverlayScrollbars instance to the given element.
* @param target The element which is the target of the OverlayScrollbars instance.
* @param osInstance The OverlayScrollbars instance.
*/
export const addInstance = (target: Element, osInstance: OverlayScrollbars): void => {
targetInstanceMap.set(target, osInstance);
targets.add(target);
};
/**
* Removes a OverlayScrollbars instance from the given element.
* @param target The element from which its OverlayScrollbars instance shall be removed.
*/
export const removeInstance = (target: Element): void => {
targetInstanceMap.delete(target);
targets.delete(target);
};
/**
* Gets the OverlayScrollbars from the given element or undefined if it doesn't have one.
* @param target The element of which its OverlayScrollbars instance shall be get.
*/
export const getInstance = (target: Element): OverlayScrollbars | undefined => targetInstanceMap.get(target);
/**
* Gets a Map which represents all active OverayScrollbars instances.
* The Key is the ekement and the value is the instance.
*/
export const allInstances = (): ReadonlyMap<Element, OverlayScrollbars> => {
const validTargetInstanceMap: Map<Element, OverlayScrollbars> = new Map();
targets.forEach((target: Element) => {
/* istanbul ignore else */
if (targetInstanceMap.has(target)) {
validTargetInstanceMap.set(target, targetInstanceMap.get(target)!);
}
});
targets.clear();
validTargetInstanceMap.forEach((instance: OverlayScrollbars, validTarget: Element) => {
targets.add(validTarget);
});
return validTargetInstanceMap;
};
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