the following function takes the first argument as the base object and adds the following object arguments' items to it. Utilizes es6's spread operator

ObjectsMergerJavaScript.js

function mergeObjects(obj, ...others) {
    // returning the base object unchanged if no other arguments are provided
    if (others.length < 1) return obj;
    
    // looping through the arguments
    for (i = 0; i < others.length; i++) {
    
        let theObj = others[i];
        // if the current object is not an object or its value is null (typeof null is "object" in js), then console log the error
        if (typeof theObj !== "object" || typeof theObj === null) {
            console.log(theObj + " is not a JavaScript object");
        } else {
            for (key in theObj) {
                if (!obj.hasOwnProperty(key)) {
                    obj[key] = theObj[key];
                }
            }
        }       

    }
    return obj;
}