Updating JavaScript object-attributes from another object

Question

(This question already has answers here): question from:https://stackoverflow.com/questions/12534238/updating-javascript-object-attributes-from-another-object

Answer 1

function update(obj/*, …*/) {
    for (var i=1; i<arguments.length; i++) {
        for (var prop in arguments[i]) {
            var val = arguments[i][prop];
            if (typeof val == "object") // this also applies to arrays or null!
                update(obj[prop], val);
            else
                obj[prop] = val;
        }
    }
    return obj;
}

should do the trick: update(currentObject, updateObject). You might want to add some type checks, like Object(obj) === obj to extend only real objects with real objects, use a correct loop for arrays or hasOwnProperty tests.