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jensenhertz avatar jensenhertz commented on June 2, 2024 1

Ah, makes sense. I didn't think about the fact you can do dynamic types. I've been also going to the direction using OM to validate external inputs because doing both TS and OM types is time consuming. Thanks for the explanation!

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sylvainpolletvillard avatar sylvainpolletvillard commented on June 2, 2024

That's actually a key difference between static and dynamic type checking. Static type checking is done at build time, and implies that all types are known in advance. Therefore your IDE can provide type-checking and autocomplete, because all types are static. That's called static code analysis.

While dynamic type-checking is done at runtime, and types can actually change dynamically. To give you a simple example, here is a Model that acts as a Number or a String depending on a coin flip:

const quanticModel = Model([Number, String]).assert(x => typeof x === (Math.random() < 0.5 ? "string" : "number"))

So it's impossible to provide Intellisense or other features related to static code analysis with dynamic type-checking solutions like ObjectModel. And it's impossible to provide type-checking based on values defined at runtime with solutions like TypeScript. Static and dynamic type-checking solutions are used for different purposes and objectives. In my current projects, I usually end up using both of them (TypeScript for core, internal logic, and ObjectModel for external interfaces controller)

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