CODEWITHSUNDEEP
typescript
Ben
Ben

Reputation: 80

Can you declare an object as itself in typescript?

In the example below, is there a way to tell typescript that arr2 is exactly the type it's initialized as?

let arr1 = [{pass: "YAY"}];
arr1[0].pass
let arr2 = [{fail: "NOO"}, 'ok'];
arr2[0].fail //compiler error

Upvotes: 1

Views: 40

Answers (1)

CertainPerformance
CertainPerformance

Reputation: 371019

as const will do what you need. It'll type the arr2 as a tuple (containing an object with a fail property, and containing an 'ok' string), and not as an array:

let arr2 = [{fail: "NOO"}, 'ok'] as const;

Upvotes: 2

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