Deep spreads objects with a syntax like `Object.assign`

deepSpread.js

const deepSpread = (...objs: any[]) => {
	return objs.reduce(
		(mixed, obj = {}) => {
			//remove this line to only replace valid indicies instead of the whole array
			if (mixed.constructor === Array) mixed = [];
			for (const [key, val] of Object.entries(obj)) {
					if (
						(val && typeof val === 'object') ||
						(mixed[key] && typeof mixed[key] === 'object')
					)
						mixed[key] = deepSpread(mixed[key], val);
					else mixed[key] = val;
			}
			return mixed;
		},
		objs[1]?.constructor === Array ? [] : objs[0]?.constructor === Array ? [] : {},
	);
};