@thi.ng/checks

# ![@thi.ng/checks](https://media.thi.ng/umbrella/banners-20230807/thing-checks.svg?567a74c6) [![npm version](https://img.shields.io/npm/v/@thi.ng/checks.svg)](https://www.npmjs.com/package/@thi.ng/checks) ![npm downloads](https://img.shields.io/npm/dm/@thi.ng/checks.svg) [![Mastodon Follow](https://img.shields.io/mastodon/follow/109331703950160316?domain=https%3A%2F%2Fmastodon.thi.ng&style=social)](https://mastodon.thi.ng/@toxi) > [!NOTE] > This is one of 201 standalone projects, maintained as part > of the [@thi.ng/umbrella](https://github.com/thi-ng/umbrella/) monorepo > and anti-framework. > > 🚀 Please help me to work full-time on these projects by [sponsoring me on > GitHub](https://github.com/sponsors/postspectacular). Thank you! ❤️ - [About](#about) - [Status](#status) - [Installation](#installation) - [Dependencies](#dependencies) - [API](#api) - [Authors](#authors) - [License](#license) ## About Collection of 70+ type, feature & value checks. - [`exists`](https://docs.thi.ng/umbrella/checks/functions/exists.html) - [`existsAndNotNull`](https://docs.thi.ng/umbrella/checks/functions/existsAndNotNull.html) - [`hasBigInt`](https://docs.thi.ng/umbrella/checks/functions/hasBigInt.html) - [`hasCrypto`](https://docs.thi.ng/umbrella/checks/functions/hasCrypto.html) - [`hasMaxLength`](https://docs.thi.ng/umbrella/checks/functions/hasMaxLength.html) - [`hasMinLength`](https://docs.thi.ng/umbrella/checks/functions/hasMinLength.html) - [`hasPerformance`](https://docs.thi.ng/umbrella/checks/functions/hasPerformance.html) - [`hasWASM`](https://docs.thi.ng/umbrella/checks/functions/hasWASM.html) - [`hasWebGL`](https://docs.thi.ng/umbrella/checks/functions/hasWebGL.html) - [`hasWebSocket`](https://docs.thi.ng/umbrella/checks/functions/hasWebSocket.html) - [`implementsFunction`](https://docs.thi.ng/umbrella/checks/functions/implementsFunction.html) - [`isASCII`](https://docs.thi.ng/umbrella/checks/functions/isASCII.html) - [`isAlpha`](https://docs.thi.ng/umbrella/checks/functions/isAlpha.html) - [`isAlphaNum`](https://docs.thi.ng/umbrella/checks/functions/isAlphaNum.html) - [`isArray`](https://docs.thi.ng/umbrella/checks/functions/isArray.html) - [`isArrayBufferLike`](https://docs.thi.ng/umbrella/checks/functions/isArrayBufferLike.html) - [`isArrayBufferView`](https://docs.thi.ng/umbrella/checks/functions/isArrayBufferView.html) - [`isArrayLike`](https://docs.thi.ng/umbrella/checks/functions/isArrayLike.html) - [`isAsyncIterable`](https://docs.thi.ng/umbrella/checks/functions/isAsyncIterable.html) - [`isBigInt`](https://docs.thi.ng/umbrella/checks/functions/isBigInt.html) - [`isBlob`](https://docs.thi.ng/umbrella/checks/functions/isBlob.html) - [`isBoolean`](https://docs.thi.ng/umbrella/checks/functions/isBoolean.html) - [`isChrome`](https://docs.thi.ng/umbrella/checks/functions/isChrome.html) - [`isDataURL`](https://docs.thi.ng/umbrella/checks/functions/isDataURL.html) - [`isDate`](https://docs.thi.ng/umbrella/checks/functions/isDate.html) - [`isEven`](https://docs.thi.ng/umbrella/checks/functions/isEven.html) - [`isFalse`](https://docs.thi.ng/umbrella/checks/functions/isFalse.html) - [`isFile`](https://docs.thi.ng/umbrella/checks/functions/isFile.html) - [`isFirefox`](https://docs.thi.ng/umbrella/checks/functions/isFirefox.html) - [`isFloatString`](https://docs.thi.ng/umbrella/checks/functions/isFloatString.html) - [`isFunction`](https://docs.thi.ng/umbrella/checks/functions/isFunction.html) - [`isGenerator`](https://docs.thi.ng/umbrella/checks/functions/isGenerator.html) - [`isHex`](https://docs.thi.ng/umbrella/checks/functions/isHex.html) - [`isHexColor`](https://docs.thi.ng/umbrella/checks/functions/isHexColor.html) - [`isIE`](https://docs.thi.ng/umbrella/checks/functions/isIE.html) - [`isIllegalKey`](https://docs.thi.ng/umbrella/checks/functions/isIllegalKey.html) - [`isInRange`](https://docs.thi.ng/umbrella/checks/functions/isInRange.html) - [`isInt32`](https://docs.thi.ng/umbrella/checks/functions/isInt32.html) - [`isIntString`](https://docs.thi.ng/umbrella/checks/functions/isIntString.html) - [`isIterable`](https://docs.thi.ng/umbrella/checks/functions/isIterable.html) - [`isMap`](https://docs.thi.ng/umbrella/checks/functions/isMap.html) - [`isMobile`](https://docs.thi.ng/umbrella/checks/functions/isMobile.html) - [`isNaN`](https://docs.thi.ng/umbrella/checks/functions/isNaN.html) - [`isNegative`](https://docs.thi.ng/umbrella/checks/functions/isNegative.html) - [`isNil`](https://docs.thi.ng/umbrella/checks/functions/isNil.html) - [`isNode`](https://docs.thi.ng/umbrella/checks/functions/isNode.html) - [`isNotStringAndIterable`](https://docs.thi.ng/umbrella/checks/functions/isNotStringAndIterable.html) - [`isNull`](https://docs.thi.ng/umbrella/checks/functions/isNull.html) - [`isNumber`](https://docs.thi.ng/umbrella/checks/functions/isNumber.html) - [`isNumeric`](https://docs.thi.ng/umbrella/checks/functions/isNumeric.html) - [`isNumericFloat`](https://docs.thi.ng/umbrella/checks/functions/isNumericFloat.html) - [`isNumericInt`](https://docs.thi.ng/umbrella/checks/functions/isNumericInt.html) - [`isObject`](https://docs.thi.ng/umbrella/checks/functions/isObject.html) - [`isOdd`](https://docs.thi.ng/umbrella/checks/functions/isOdd.html) - [`isPlainObject`](https://docs.thi.ng/umbrella/checks/functions/isPlainObject.html) - [`isPositive`](https://docs.thi.ng/umbrella/checks/functions/isPositive.html) - [`isPrimitive`](https://docs.thi.ng/umbrella/checks/functions/isPrimitive.html) - [`isPrintableASCII`](https://docs.thi.ng/umbrella/checks/functions/isPrintableASCII.html) - [`isPromise`](https://docs.thi.ng/umbrella/checks/functions/isPromise.html) - [`isPromiseLike`](https://docs.thi.ng/umbrella/checks/functions/isPromiseLike.html) - [`isProtoPath`](https://docs.thi.ng/umbrella/checks/functions/isProtoPath.html) - [`isRegExp`](https://docs.thi.ng/umbrella/checks/functions/isRegExp.html) - [`isSafari`](https://docs.thi.ng/umbrella/checks/functions/isSafari.html) - [`isSet`](https://docs.thi.ng/umbrella/checks/functions/isSet.html) - [`isString`](https://docs.thi.ng/umbrella/checks/functions/isString.html) - [`isSymbol`](https://docs.thi.ng/umbrella/checks/functions/isSymbol.html) - [`isTouchEvent`](https://docs.thi.ng/umbrella/checks/functions/isTouchEvent.html) - [`isTransferable`](https://docs.thi.ng/umbrella/checks/functions/isTransferable.html) - [`isTrue`](https://docs.thi.ng/umbrella/checks/functions/isTrue.html) - [`isTypedArray`](https://docs.thi.ng/umbrella/checks/functions/isTypedArray.html) - [`isUUID`](https://docs.thi.ng/umbrella/checks/functions/isUUID.html) - [`isUUIDv4`](https://docs.thi.ng/umbrella/checks/functions/isUUIDv4.html) - [`isUint32`](https://docs.thi.ng/umbrella/checks/functions/isUint32.html) - [`isUndefined`](https://docs.thi.ng/umbrella/checks/functions/isUndefined.html) - [`isZero`](https://docs.thi.ng/umbrella/checks/functions/isZero.html) ## Status **STABLE** - used in production [Search or submit any issues for this package](https://github.com/thi-ng/umbrella/issues?q=%5Bchecks%5D+in%3Atitle) ## Installation ```bash yarn add @thi.ng/checks ``` ESM import: ```ts import * as ch from "@thi.ng/checks"; ``` Browser ESM import: ```html <script type="module" src="https://esm.run/@thi.ng/checks"></script> ``` [JSDelivr documentation](https://www.jsdelivr.com/) For Node.js REPL: ```js const ch = await import("@thi.ng/checks"); ``` Package sizes (brotli'd, pre-treeshake): ESM: 1.65 KB ## Dependencies - [tslib](https://www.typescriptlang.org/) ## API [Generated API docs](https://docs.thi.ng/umbrella/checks/) TODO ## Authors - [Karsten Schmidt](https://thi.ng) (Main author) - [Gavin Cannizzaro](https://github.com/gavinpc-mindgrub) - [Jay Zawrotny](https://github.com/eccentric-j) If this project contributes to an academic publication, please cite it as: ```bibtex @misc{thing-checks, title = "@thi.ng/checks", author = "Karsten Schmidt and others", note = "https://thi.ng/checks", year = 2016 } ``` ## License © 2016 - 2025 Karsten Schmidt // Apache License 2.0