/TypeScript/Typescript one of the array items

Typescript one of the array items

Typescript one of array

function stringLiterals<T extends string>(...args: T[]): T[] { return args; }
type ElementType<T extends ReadonlyArray<unknown>> = T extends ReadonlyArray<infer ElementType> ? ElementType : never;

const values = stringLiterals('A', 'B');
type Foo = ElementType<typeof values>;

const v1: Foo = 'A' // This should work
const v2: Foo = 'D' // This should give me an error since 'D' doesn't exist in values

Source: github.com

Typescript one of the array items

const animals = ['cat', 'dog', 'mouse'] as const
type Animal = typeof animals[number]

// type Animal = 'cat' | 'dog' | 'mouse'

Source: steveholgado.com

Similar codes

1 vote174 views2 answers
Dart clone list
TypeScript
0 vote154 views3 answers
Error: Maximum update depth exceeded. This can happen when a component repeatedly calls setState inside componentWillUpdate or componentDidUpdate. React limits the number of nested updates to prevent infinite loops.
TypeScript
0 vote215 views1 answer
Keyboard events pygame
TypeScript
0 vote161 views1 answer
Foreach localstorage
TypeScript
10 votes151 views3 answers
Usage typescript in react native
TypeScript
0 vote168 views1 answer
Must_not exists elastic search
TypeScript
1 vote180 views1 answer
CLIENT MISSING INTENTS discord
TypeScript
0 vote169 views2 answers
List elements not in indices
TypeScript
0 vote163 views1 answer
React.ComponentProps<T>
TypeScript
3 votes149 views1 answer
Typescript react input type
TypeScript