What this snippet does
Unlike getters/setters, property decorators do not intercept assignments; they only run once during class definition.
Expected output
20
Why practise typing this
Typing decorators 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
- Applying a basic class decoratorDecorators · advanced
- Injecting metadata into a classDecorators · advanced
- Decorator returning an invalid typeDecorators · advanced
- Logging method calls with a decoratorDecorators · advanced
- Depracating a method safelyDecorators · advanced
- Losing 'this' context in method decoratorsDecorators · advanced