Grokking Node.js Design Patterns for Interviews/

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Implement a Config-Driven Notification Service Factory

Implement a Config-Driven Notification Service Factory

Create a notification factory that builds the correct service (email, SMS, or push) from a nested config object.

We'll cover the following...

Problem statement

Your app supports multiple notification channels—Email, SMS, and Push. The active channel is defined in a nested config object like:

const config = {
  notifications: {
    channel: 'sms'
  }
}

The team wants to support swappable notification ...