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type-check

npmv0.4.0

type-check allows you to check the types of JavaScript values at runtime with a Haskell like type syntax.

Not recommended for new projects

No — type-check should not be adopted for new projects. Last published 2351 days ago.

  • ?Adoption: grade ?, Not reported by this registry.

    No download data reported for this package yet.

  • FMaintenance: grade F, Failing.

    Last published 2351 days ago.

  • AWeight: grade A, Excellent.

    Pulls in 1 transitive package, about 57 KB installed.

  • BSupply chain: grade B, Good.

    This package has a single maintainer (bus factor of 1).

  • ALicense: grade A, Excellent.

    MIT — permissive, with no copyleft found in the dependency tree.

Grades are computed deterministically from registry metadata collected by PackageGraph — downloads, dependents, publish dates, the resolved dependency tree, maintainer count, and declared licenses. No third-party scores are used.

Install cost

What you actually take on by adding type-check to a project.

1
Direct dependencies

Runtime packages this one declares itself.

1
Total installed

Distinct packages in the full runtime tree, deduplicated the way a package manager would.

57 KB
Install size

Unpacked size of this package plus its entire runtime tree.

1
Tree depth

Longest resolved dependency chain below this package.

Licenses in the dependency tree

MIT

Every license you inherit by installing type-check, not just its own. Check this before a legal review, not after.

Compatibility

Node.js
node >= 0.8.0
Module format
CommonJS only
TypeScript
No bundled types
Install scripts
None

Quick start

A usage example from the type-check README.

jsFull README ↗
// Basic types:
var typeCheck = require('type-check').typeCheck;
typeCheck('Number', 1);               // true
typeCheck('Number', 'str');           // false
typeCheck('Error', new Error);        // true
typeCheck('Undefined', undefined);    // true

// Comment
typeCheck('count::Number', 1);        // true

// One type OR another type:
typeCheck('Number | String', 2);      // true
typeCheck('Number | String', 'str');  // true
Example truncated — see the full README.

type-check vs the alternatives

Packages solving a similar problem in the npm ecosystem, compared on the signals that drive an adoption decision.

PackageWeekly downloadsDependentsLicenseLast release
type-checkthis page02MIT6 years ago
type-is130.9M3MIT1 day ago
is-plain-obj112.9M1MIT1 day ago
is-generator-fn01MIT1 day ago
zod246.7M13MIT1 day ago
has-flag166.9M1MIT1 day ago

Dependencies

Declared by type-check v0.4.0. Runtime dependencies are installed with the package; dev dependencies are not.

Runtime (1)

prelude-ls ^1.2.1

Dev (3)

browserify ^16.5.1livescript ^1.6.0mocha ^7.1.1

Used by

Popular packages that depend on type-check.

optionatornpm

option parsing and help generation

↓ 0/wk◈ 2 dependents⚖ MIT
levnnpm

Light ECMAScript (JavaScript) Value Notation - human written, concise, typed, flexible

↓ 0/wk◈ 2 dependents⚖ MIT

Relationship graph

Dependencies (left) and dependents (right) of type-check.

prelude-lsoptionatorlevntype-check
type-check dependencies dependents

Frequently installed together

prelude-lsnpm

prelude.ls is a functionally oriented utility library. It is powerful and flexible. Almost all of its functions are curried. It is written in, and is the recommended base library for, LiveScript.

↓ 0/wk◈ 3 dependents⚖ MIT
word-wrapnpm

Wrap words to a specified length.

↓ 93.2M/wk◈ 1 dependents⚖ MITTS
deep-isnpm

node's assert.deepEqual algorithm except for NaN being equal to NaN

↓ 0/wk◈ 1 dependents⚖ MIT
levnnpm

Light ECMAScript (JavaScript) Value Notation - human written, concise, typed, flexible

↓ 0/wk◈ 2 dependents⚖ MIT
fast-levenshteinnpm

Efficient implementation of Levenshtein algorithm with locale-specific collator support.

↓ 0/wk◈ 3 dependents⚖ MIT

Release history

No releases in the last two years, typically about 160 days apart.

Recent versions of type-check
VersionPublishedSizeLicense
0.4.0latest6 years ago21 KBMIT
0.3.210 years ago—MIT
0.3.112 years ago—MIT
0.3.013 years ago—MIT
0.2.013 years ago—MIT
0.1.013 years ago—MIT

Overview

type-check is an npm package that type-check allows you to check the types of JavaScript values at runtime with a Haskell like type syntax. It has 2 known dependents in the graph. The latest version is 0.4.0, released under the MIT license.

Who should use it

Teams working in the npm ecosystem who need type-check allows you to check the types of JavaScript values at runtime with a Haskell like type syntax and value a focused solution.

When not to use it

Consider an alternative if you need to have first-class TypeScript types out of the box, or if a more actively-maintained option better fits your npm stack.

Pros

  • Clear open-source license (MIT).

Cons

  • No bundled TypeScript types (may require a separate @types package).

Auto-generated from collected registry metadata. No external claims are inferred.

Maintainers

gkz

Keywords

checkcheckinglibrarytype

Frequently asked questions

Should I use type-check?

No — type-check should not be adopted for new projects. Last published 2351 days ago.

How do I install type-check?

Run `npm install type-check` to add type-check to your npm project.

How many dependencies does type-check have?

type-check declares 4 direct dependencies and pulls in 1 packages in total once its runtime tree is resolved totalling about 57 KB on disk.

What license is type-check released under?

type-check is distributed under the MIT license.

How popular is type-check?

npm does not publish download counts. Within PackageGraph's crawl, 2 known packages depend on type-check.

Is type-check still maintained?

The most recent release of type-check (v0.4.0) was published 6 years ago.

Does type-check run install scripts?

No. type-check does not define preinstall, install, or postinstall scripts, so installing it does not execute publisher-supplied code.