Add ArrayAt type for stricter Array.prototype.at() with tuples
10
👍
0See sindresorhus/ts-extras#39 and microsoft/TypeScript#47660.
const tuple = ['abc', 123, true] as const;
type First = ArrayAt<typeof tuple, 0>; // 'abc'
type Last = ArrayAt<typeof tuple, -1>; // true
type SecondToLast = ArrayAt<typeof tuple, -2>; // 123
type ThirdToLast = ArrayAt<typeof tuple, -3>; // 'abc'
type OutOfBounds = ArrayAt<typeof tuple, 999>; // should not compile since 999 does not extend 0 | 1 | 2 | -1 | -2 | -3const array = ['abc', 123, true];
type First = ArrayAt<typeof tuple, 0>; // string | number | true
type Last = ArrayAt<typeof tuple, -1>; // string | number | true
type OutOfBounds = ArrayAt<typeof tuple, 999>; // string | number | true
sindresorhus / type-fest
A collection of essential TypeScript types
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