What are some examples of the Strategy Pattern in JavaScript?

Can you explain the Strategy Pattern in JavaScript?

Sure! The Strategy Pattern is a behavioral design pattern that enables selecting an algorithm's behavior at runtime.

Can you give me a practical example of it?

Absolutely! Imagine a payment system where you can choose between different payment methods like credit card, PayPal, or Bitcoin. Each payment method can be a strategy.

How would you implement that in code?

You can create a PaymentContext class that uses a PaymentStrategy interface. Each payment method would implement this interface.

Could you show me a code snippet for that?

Sure! Here's a simple example:

class PaymentStrategy {
    pay(amount) {}
}

class CreditCardPayment extends PaymentStrategy {
    pay(amount) { console.log(`Paid ${amount} using Credit Card`); }
}

class PayPalPayment extends PaymentStrategy {
    pay(amount) { console.log(`Paid ${amount} using PayPal`); }
}

class PaymentContext {
    constructor(strategy) {
        this.strategy = strategy;
    }
    executePayment(amount) {
        this.strategy.pay(amount);
    }
}

const payment = new PaymentContext(new CreditCardPayment());
payment.executePayment(100);

That's a great example! Thanks for explaining.