Use an object indexes to define a possible types in typescript-CodePudding

I know that we can extract type possibilies using an array:

const fruits = ['Apple', 'Pear', 'Banana'] as const
type fruitType = typeof fruits[number] // "Apple" | "Pear" | "Banana"

I wonder if we can do this using object indexes instead?

const fruits = {
  apple: { shape: 'round', color: 'red' },
  pear: { shape: 'pear-like', color: 'yellow' },
  banana: { shape: 'banana-shaped', color: 'banana-colored' }
}
type fruitType = typeof indexes of fruits // "apple" | "pear" | "banana"

Thanks!

CodePudding user response：

I believe this is what you are looking for:

type fruitType = keyof typeof fruits // "apple" | "pear" | "banana";

Here is a link to the documentation as @jcalz suggested, and the Playground