Suppose we have the following object:
o {a : 1, b : 2}
and this interface defined as:
interface MyInterface {
a : number
}
We are now looking to create a new object that represents the "intersection" of o and the MyInterface:
o2 : {a : 1}
The main objective is to send only relevant data to a REST service that expects a MyInterface object.
Is there a built-in function in Typescript to achieve this intersection?
It seems like you're mixing things up a bit here. The variable o is a value, whereas MyInterface represents a type.
If you want to create a type that combines both MyInterface and the type of o, you can use typeof o & MyInterface. However, it's not possible to generate logic at the value level based on types (such as extracting properties from an object based on an interface).
Instead of using MyInterface, consider substituting it with a concrete value like an array of keys, a class, or another object. With this approach, you can apply standard JavaScript techniques to intersect objects, and TypeScript should still work seamlessly.
TypeScript is a revolutionary language that brings advanced type system features and polyfill capabilities to JavaScript, enabling async / await functionality in older ES3+ environments.
Due to its focus on type safety and modernizing JavaScript code, TypeScript does not include the specific utility functions you may be seeking.
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