Object vs prototype

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Object
function cloneObject (obj) {
    var newObj = {};

    for (var key in obj) {
        newObj[key] = obj[key];
    }

    return newObj;
}

var button = {
    method1: function () {
        console.log('method1 called');
    },
    method2: function () {
    }
};

var newButton = cloneObject(button);

newButton.method1();

 
ready
Prototype
function Button () {
}

Button.prototype.method1 = function () {
    console.log('method1 called');
};

Button.prototype.method2 = function () {
};

var newButton = new Button();
newButton.method1();
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