🔸Replacing a Property in TypeScript Data Types Without Duplicating🔸

While writing code, we often face challenging situations. I focus on finding ways to simplify development and increase type safety. One such issue was adapting user IDs in my back-end project. Here is how I fixed it using TypeScript.

▪️Problem: Adapting User Identifiers for External Integration

In my project, I had several data types that used a userId property to identify users. For an external integration, I needed to replace this userId with a customerId. This required modifying multiple existing types without duplicating code or compromising type safety.

▪️Solution: Using TypeScript Utility Types

To solve this issue, I created a utility type that ensures the type includes a userId property, omits the userId, and adds a customerId property. This approach allowed me to transform the existing data types efficiently.

▪️Implementation

I applied the utility type to transform the existing data types in my project. This ensured that my code remained consistent and type-safe.

For more details and the full implementation, please check out the GitHub repository.

▪️Lessons Learned

This approach allowed me to reuse existing types, ensuring consistency and type safety across my data models while adhering to the DRY principle. There can be more than one solution for every problem we encounter. I would love to know your thoughts about my approach and any alternative solutions you may have. Let’s learn from each other.