objCreate.js

var cardJSON = {
    text:'this is text',
    color:'red'
};

var Card = function(obj){
    var that = this;
    var props = Object.getOwnPropertyNames(obj);
    props.forEach(function(prop){
        var propDescriptor = Object.getOwnPropertyDescriptor(obj, prop);
        that[prop] = propDescriptor.value
    });
    function setColor(color){
        that.color = color;
    }
    
    return {
        props : that,
        setColor : setColor
    };
};

var card1 = new Card(cardJSON);
console.log(card1.props.color);
card1.setColor('blue');
console.log(card1.props.color);