The concept of passing arguments in Typescript

During my experience with Typescript programming, I encountered a situation like the one described below.
If I pass an argument containing an object with the same name as the parameter defined in the function signature, Typescript recognizes it, but not otherwise.

What is this particular feature of Typescript known as? Could it also be considered a form of type inference?

https://i.stack.imgur.com/KMwl2.png

Answer №1

TypeScript is specifically verifying the parameter being passed to func. The function func is defined as expecting an object with a key named bar.

The first and second calls to func are successful because the argument passed meets the criteria, but the third call results in an error. This is because the object passed does not contain a property named bar, but rather has a property named bbar.

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