| 1 | /** |
| 2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | * |
| 4 | * This source code is licensed under the MIT license found in the |
| 5 | * LICENSE file in the root directory of this source tree. |
| 6 | */ |
| 7 | |
| 8 | /** |
| 9 | * Given an object type with multiple keys, produce a type that has either all of the keys non-null, or all the keys undefined |
| 10 | * ``` |
| 11 | * EnsureAssignedTogether<{a: number, b: string}> === {a: number, b: string} | {a?: undefined, b?: undefined} |
| 12 | * ``` |
| 13 | * This is useful for props that need to be provided together. |
| 14 | **/ |
| 15 | export type EnsureAssignedTogether<T extends object> = T | {[key in keyof T]?: undefined}; |
| 16 | |