mergeDeep.ts28 lines · main

1	/**
2	* Check if item is Object
3	*/
4	export function isObject(item: any): boolean {
5	return item && typeof item === 'object' && !Array.isArray(item)
6	}
7
8	/**
9	* Deep merge two objects.
10	* @return merged object
11	*/
12	export function mergeDeep(target: any, ...sources: any[]): any {
13	if (sources.length === 0) return target
14	const source = sources.shift()
15
16	if (isObject(target) && isObject(source)) {
17	for (const key in source) {
18	if (isObject(source[key])) {
19	if (!target[key]) Object.assign(target, { [key]: {} })
20	mergeDeep(target[key], source[key])
21	} else {
22	Object.assign(target, { [key]: source[key] })
23	}
24	}
25	}
26
27	return mergeDeep(target, ...sources)
28	}