getAllPropertyNames(obj) collects property names of the entire prototype chain until it reaches `Object` by using `Object.getOwnPropertyNames()`

getAllPropertyNames.ts

/**
 * Similar to Object.getOwnPropertyNames(obj) but including the properties of the entire prototype chain
 * @param obj
 * @param maxChainLength
 */
export function getAllPropertyNames(
	obj: { new(): any },
	maxChainLength: number = 10
): string[] {
	let set: Set<string> = new Set(), i: number = 0;
	do { i++;
		Object.getOwnPropertyNames(obj).forEach(n => set.add(n));
		obj = Object.getPrototypeOf(obj);
	} while(obj.constructor !== Object && i < maxChainLength);
	return [...set];
}