What is the best way to access an object's key within an array using TypeScript?

How can I access the key values of the objects stored in a predefined array?

const temp = [
  { key: "name", value: "mike" },
  { key: "gender", value: "male" },
];

I am interested in retrieving the key values, such as name and gender, from the objects within the temp array to create a union type.

Answer №1

By including the as const annotation in your array declaration, you can conveniently access the type of the keys:

const example = [
  { key: "name", value: "mike" },
  { key: "gender", value: "male" },
] as const;

type ExampleKey = (typeof example)[number]["key"];

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