An enum groups related constants:
- Numeric enum:
enum Direction { Up, Down }(Up = 0, Down = 1) - String enum:
enum Status { Active = "ACTIVE" }
Many teams prefer union literal types ("up" | "down") because they compile to no extra code.
TypeScript Enums
Named constants.
✍️ 3 exercises + code challenge in this lessonKey Takeaways: TypeScript Enums
Mastering TypeScript Enums helps you write clean and reliable TypeScript code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.
TypeScript Enums Code Example
TypeScriptenum Status {
Pending = "PENDING",
Shipped = "SHIPPED",
Delivered = "DELIVERED",
}
enum Level { Low, Medium, High }
const order: Status = Status.Shipped;
console.log(order, Level.High);Output
SHIPPED 2
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TypeScript Enums Practice Exercises
Check what you learned in “TypeScript Enums”.
/ 3 solved
Fill in the blank
Declare an enum.
Color { Red, Green, Blue }
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Multiple choice
In enum Level { Low, Medium, High }, what is Level.Medium?
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Code challenge
Create enum Role { Admin = "ADMIN", User = "USER" } and log Role.Admin.
Write the code in the live editor. Your answer is checked automatically.
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