froebel/nullish.js

TypeScript utility library

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.nullish = exports.notNullish = void 0;

/** Checks if `value` is nullish. Literal types are narrowed accordingly. */
const nullish = value => value === undefined || value === null;

exports.nullish = nullish;

/**
 * Checks if `value` is not nullish. Literal types are narrowed accordingly.
 *
 * @example
 * ```
 * const nums = (...values: (number | undefined)[]): number[] => values.filter(notNullish)
 * ```
 */
const notNullish = value => value !== null && value !== undefined;

exports.notNullish = notNullish;
module.exports = Object.assign(exports.default || {}, exports);