TypeScript · Middle · Question 65 of 75

What do the intrinsic types `Uppercase`, `Capitalize` etc. allow?

type Getter<K extends string> = `get${Capitalize<K>}`;
type G = Getter<'name'>; // 'getName'

✓Correct answer: Transforming string literal types, often combined with template literal and mapped types
2Changing strings at runtime
3Only checking that a string is uppercase

Explanation

They let you derive names like getName/onClick from keys, keeping APIs consistent automatically.

Further reading

TS Handbook: Template Literal Types ↗

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