I tried out the following code snippet here
interface OnlyName {
name: string
}
interface MyTest2 extends OnlyName {
age: number
}
let test1: OnlyName;
const setTest1 = (v: OnlyName) => {
test1 = v
console.log(test1)
}
let test2: MyTest2 = {
name: 'test2',
age: 2,
}
setTest1(test2)
I was expecting an error when calling setTest1() because it is supposed to only accept parameters of type OnlyName. However, to my surprise, it worked even when passing MyTest2.
Why did it not throw an error and is there a way to enforce only accepting OnlyName?