Literal Types and Enums

Literal Types restrict values to specific strings or numbers. Enums group related constants, providing a named list of numeric or string options.

Worked example

How it reads

'dusk' | 'neon' forces the theme to match only those literals
enum Direction creates lookup constants available at runtime

Cloud tip: Default to union literal types for simplicity unless you need lookup constants.

index.ts

TYPESCRIPT

type-checked, then run in your browser

Console

Run your code to see its output here.

YOUR TURN

Add Orbit = 2 to FlightState, then log FlightState.Orbit and FlightState[2]: 2 then Orbit.

Press Run to check your work.

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