There is no corresponding index signature for type 'string' in Type

This is the code snippet I am using as a reference:

const MyArray = [
  { name: "Alice", age: 15 },
  { name: "Bob", age: 23 },
  { name: "Eve", age: 38 },
];

type Name = typeof MyArray[string]["name"]; //throws error as Type '{ name: string; age: number; }[]' has no matching index signature for type 'string'
type Age = typeof MyArray[number]["age"] //no error

I've noticed that I can easily access the age property, but encountering an error when trying to access the name in a similar manner. Can someone explain why this error occurs? Any help would be greatly appreciated!

Thank you in advance.

Answer №1

If you desire to retrieve the name in a similar manner to how you access the age, simply use typeof MyArray[number]["name"]. The reason for this is that the array indexes are numerical values.

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