import { type RequiredKeysOf } from "https://deno.land/x/actionify@0.3.0/src/deps/types.ts";
Extract all required keys from the given type.
This is useful when you want to create a new type that contains different type values for the required keys only or use the list of keys for validation purposes, etc...
Examples
Example 1
Example 1
import type {RequiredKeysOf} from 'type-fest';
declare function createValidation<Entity extends object, Key extends RequiredKeysOf<Entity> = RequiredKeysOf<Entity>>(field: Key, validator: (value: Entity[Key]) => boolean): ValidatorFn;
interface User {
name: string;
surname: string;
luckyNumber?: number;
}
const validator1 = createValidation<User>('name', value => value.length < 25);
const validator2 = createValidation<User>('surname', value => value.length < 25);