step7-assignment.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script>
        /*
        let cart = {
            getCostPrice : function(){
                return 100;
            },
            getSellingPrice : function(){
                let self = this;
                let calculateProfit = function(){
                    return self.getCostPrice() * 0.2;
                }
                return this.getCostPrice() + calculateProfit();
            }
        };
        console.log(cart.getSellingPrice());// 120
        */
        let cart = {
            getCostPrice : function(){
                return 100;
            },
            getSellingPrice : function(){
                let calculateProfit = function(){
                    return this.getCostPrice() * 0.2;
                }
               // return this.getCostPrice() + calculateProfit.call(this);
               // return this.getCostPrice() + calculateProfit.apply(this);
                return this.getCostPrice() + calculateProfit.bind(this)();
            }
        };
        console.log(cart.getSellingPrice());// 120
    </script>
</head>
<body>
    
</body>
</html>