/** * Simple object check. * @param item * @returns {boolean} */ export function isObject(item: unknown): item is Record<string, unknown> { return !!item && typeof item === 'object' && !Array.isArray(item) } /** * Deep merge two objects. * @param target * @param ...sources */ export function mergeDeep( target: Record<string, unknown>, ...sources: Record<string, unknown>[] ): Record<string, unknown> { if (!sources.length) { return target } const source = sources.shift() if (isObject(target) && isObject(source)) { for (const key in source) { if (isObject(source[key])) { if (!target[key]) { Object.assign(target, { [key]: {} }) } mergeDeep( target[key] as Record<string, unknown>, source[key] as Record<string, unknown> ) } else if (Array.isArray(target[key]) && Array.isArray(source[key])) { return (target[key] as unknown[]).map((el, i) => mergeDeep( el as Record<string, unknown>, (source[key] as unknown[])[i] as Record<string, unknown> ) ) as unknown as Record<string, unknown> } else { Object.assign(target, { [key]: source[key] }) } } } return mergeDeep(target, ...sources) }