What this snippet does
Type aliases can define object shapes just like interfaces, offering a slightly different syntax.
Expected output
30
Why practise typing this
Typing type aliases vs interfaces code builds muscle memory for the symbols and indentation TypeScript uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.
More TypeScript practice
- Creating a simple type aliasType Aliases vs Interfaces · beginner
- Assigning a boolean to a union type aliasType Aliases vs Interfaces · beginner
- Comparing type and interface syntaxType Aliases vs Interfaces · beginner
- Using a type alias for a recursive JSON structureType Aliases vs Interfaces · beginner
- Attempting to declare a duplicate type aliasType Aliases vs Interfaces · beginner
- Defining a constructable type aliasType Aliases vs Interfaces · advanced