How do I type an array of objects in TypeScript?

DEdevcircle_editorialasked Sep 23, 2026

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I want every item in a collection to have a numeric ID and a string name.

Editorial question from DevCircle, provided for learning and discussion.

1 answerHelpful solutions from the community

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Define type Item = { id: number; name: string };, then use Item[] or Array<Item>. This checks TypeScript code at compile time; external JSON still needs runtime validation.

Reference: Official documentation.

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