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- /**
- Create a union of the given object's values, and optionally specify which keys to get the values from.
- Please upvote [this issue](https://github.com/microsoft/TypeScript/issues/31438) if you want to have this type as a built-in in TypeScript.
- @example
- ```
- // data.json
- {
- 'foo': 1,
- 'bar': 2,
- 'biz': 3
- }
- // main.ts
- import {ValueOf} from 'type-fest';
- import data = require('./data.json');
- export function getData(name: string): ValueOf<typeof data> {
- return data[name];
- }
- export function onlyBar(name: string): ValueOf<typeof data, 'bar'> {
- return data[name];
- }
- // file.ts
- import {getData, onlyBar} from './main';
- getData('foo');
- //=> 1
- onlyBar('foo');
- //=> TypeError ...
- onlyBar('bar');
- //=> 2
- ```
- */
- export type ValueOf<ObjectType, ValueType extends keyof ObjectType = keyof ObjectType> = ObjectType[ValueType];
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