@swift-ws/gulp-kit/gulp/helpers/deepMerge.js

A starter kit for automating frontend development using Gulp.js.

import {relative, join} from 'path';

export function deepMerge(target = {}, source = {}) {
    const isObject = (item) => (item && typeof item === 'object' && !Array.isArray(item));

    if (isObject(target) && isObject(source)) {

        for (const key in source) {
            if (isObject(source[key])) {
                if (!target[key]) {
                    Object.assign(target, { [key]: {} });
                }
                deepMerge(target[key], source[key]);
            } else {
                Object.assign(target, { [key]: source[key] });
            }
        }
    }

    return target;
}