Tips for transforming or changing Partial<T> into T

I have a variable named Partial<T> in my coding project.

returnPartial(): Partial<T> {}

proceed(param T) {} //<-- the provided input parameter will always be of type T in this function and cannot be changed

let object = this.returnPartial();
this.proceed(object) //<-- error: Argument of type 'Partial<T>' is not assignable to a parameter of type 'T'.

In some cases, the object variable actually has the same structure as T. Therefore, I need to convert or cast it to T in order to pass it to another function. How can this be achieved?

typescripttypescript-typings

Answer №1

By using the as keyword, you can explicitly convert an object into a different type in TypeScript.

executeConversion(obj as NewType)

Answer №2

Aside from @Adrian Brand's accurate response, here are the two distinct ways you can utilize to convert values:

sandbox

interface Foo {
    name: string;
}

type B = Partial<Foo>;

const b: B = {
    name: 'toot',
};

function f(_: Foo) { }

// Method #1
f(<Foo>b);

// Method #2
f(b as Foo);


f(b);

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