Is passing data through interfaces a suitable practice in TypeScript?

In my project, I have come across instances where an interface is being utilized instead of a class. For example:

function check(car: ICar) {
//perform some actions
}

this.check({mark: "Toyota", colour: "blue"});

Is it acceptable to continue using interfaces in this way or would it be better to rewrite the code with proper classes?

Answer №1

The item in question meets all the criteria of being a valid ICar (assuming it aligns with our standard definition...).

Remember, there's no requirement to incorporate classes simply because you're working with TypeScript - they are a separate concept from the type system and should only be utilized when necessary.

Answer №2

function validateCar(car: ICar) {
     ...
}

This function serves as a gatekeeper, stipulating that only objects conforming to the ICar interface can be assigned to the local variable car.

No actual interface is physically handed over in this process.

Picture it like a vigilant doorman, selectively permitting certain inputs.

this.validateCar({make: "Toyota", model: "Camry"});

This represents an invocation of the validateCar function using an object that may or may not meet the requirements of the ICar interface.

In typescript, type checking occurs at compile time, meaning any errors will show up when running the compiler with tsc.

Remember, if you pass a different data type during runtime, there won't be validation checks, potentially leading to faulty code execution.

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