<script>
var Product = kendo.data.Model.define({
    id: "productId",
    fields: {
        productId: { type: "number" },
        name: { type: "string" },
        price: { type: "number" },
        category: { type: "string" }
    }
});

var product = new Product({
    productId: 1,
    name: "Wireless Mouse",
    price: 29.99,
    category: "Computer Accessories"
});

var jsonObject = product.toJSON();

/* The result can be observed in the DevTools(F12) console of the browser. */
console.log(jsonObject); // outputs { productId: 1, name: "Wireless Mouse", price: 29.99, category: "Computer Accessories" }
/* The result can be observed in the DevTools(F12) console of the browser. */
console.log(typeof jsonObject); // outputs "object" - it's a plain JavaScript object
/* The result can be observed in the DevTools(F12) console of the browser. */
console.log(JSON.stringify(jsonObject)); // outputs JSON string representation
</script>