Merge two objects using JavaScript.

mergeObjects.js

/**
 * Merges Obj1 data into Obj2.
 * 
 * @param {Object} obj1
 * @param {Object} obj2
 * @returns merged object
 * 
 * @example 
 * const a = {v : [1,2]};
 * const b = {v: [3]}
 * 
 * console.log({...a, ...b}, mergeObjects(a,b));
 * console.log({...b, ...a}, mergeObjects(b,a));
 */
function mergeObjects(obj1, obj2) {
    const o1 = { ...obj1 }, o2 = { ...obj2 };
    for (const key in o1) {
        if (o1.hasOwnProperty(key)) {
            if (Array.isArray(o2[key]) && Array.isArray(o1[key])) {
                o2[key] = [...o1[key], ...o2[key]];
                continue;
            }
            if (typeof o2[key] === "object" && typeof o1[key] === "object") {
                o2[key] = mergeObjects(o1[key], o2[key]);
                continue;
            }
            o2[key] = o1[key];
        }
    }
    return o2;
}

ez.js is more than just a library; it's a coding companion that simplifies complex tasks. Whether you're dealing with arrays, numbers, objects, or strings, ez.js has got your back! Say goodbye to coding hassles and hello to streamlined JavaScript magic.

• Typescript supported
• Github Repo
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• Documentation