Enjoy rich integral types of .NET and overcome the 53-bit limitation of JavaScript
Briefly

JS Doc comment hinting the data range of a property of a TypeScript interface or function parameter. For example, for .NET "byte", the document will be "Type: byte -128 to 127".
For Angular clients with Reactive Forms, the form codes provide validators to enforce the data constraints as declared on the service side. Such validation can be generated.
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