Registry / type-stubs / typescript-union

typescript-union

library0.2.0jsnpmunverified

A utility library providing generic types for manipulating TypeScript unions at the type level. Version 0.2.0 is current; the package is experimental and sees infrequent updates. Key differentiators: offers type transformations such as filtering and mapping union members without runtime code. Alternatives like type-fest or utility-types provide broader type utilities but may lack union-specific operations.

type-stubs

npm install typescript-union

github ↗package ↗

INSTALL

IMPORT

SIG · TYPESCRIPT-UNION

typescript-union

type-stubsjavascriptv0.2.0

Install

—

Import

—

Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–223 runs

build_error

glibc

node 18–223 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

Filter

✓ import { Filter } from 'typescript-union'

Used in type context only; no runtime export.

Split

✓ import { Split } from 'typescript-union'

✗ const { Split } = require('typescript-union')

ESM-only; avoid CommonJS require.

UnionToIntersection

✓ import { UnionToIntersection } from 'typescript-union'

Exported as named type.

Demonstrates Filter and UnionToIntersection type utilities for union transformations.

import { Filter, UnionToIntersection } from 'typescript-union'; type Mixed = string | number | boolean; type OnlyStrings = Filter<Mixed, string>; // string type Funcs = ((x: string) => void) | ((x: number) => void); type Intersected = UnionToIntersection<Funcs>; // (x: string & number) => void

Debug

Known issues

deprecatedPackage is abandoned; no updates since 2020.

fix

Consider alternatives like type-fest or ts-essentials.

affects: >=0.0.0

gotchaAll exports are types only; importing at runtime will cause errors.

fix

Use import type syntax: import type { Filter } from 'typescript-union'.

affects: >=0.0.0

breakingRemoval of deprecated type aliases in version 0.2.0.

fix

Replace deprecated aliases with the new names per changelog.

affects: >=0.2.0

Errors

Common errors & fixes

Cannot find module 'typescript-union' or its corresponding type declarations.

Package not installed or missing type definitions.

fix

Install: npm install typescript-union --save-dev

'Filter' cannot be used as a value because it is a type.

Runtime usage of a type-only export.

fix

Remove from runtime code or use import type.

Upgrade

Version history

0.2.0latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

26 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/ksxnodemodules/typescript-union ↗

packagehttps://www.npmjs.com/package/typescript-union ↗