@thi.ng/checks

This is one of 216 standalone projects. LLM-free, human-made and cared for software, maintained as part of the @thi.ng/umbrella ecosystem and anti-framework.

Please help me to work full-time on these projects by sponsoring me. Thank you!

• About
• Status
• Installation
• Dependencies
• API
• Authors
• License

About

Collection of 70+ type, feature & value checks.

• exists
• existsAndNotNull
• hasBigInt
• hasCrypto
• hasMaxLength
• hasMinLength
• hasPerformance
• hasWASM
• hasWebGL
• hasWebSocket
• implementsFunction
• isASCII
• isAlpha
• isAlphaNum
• isArray
• isArrayBufferLike
• isArrayBufferView
• isArrayLike
• isAsyncIterable
• isBigInt
• isBlob
• isBoolean
• isChrome
• isDarkMode
• isDataURL
• isDate
• isEven
• isFalse
• isFile
• isFirefox
• isFloatString
• isFunction
• isGenerator
• isHex
• isHexColor
• isIE
• isIllegalKey
• isInRange
• isInt32
• isIntString
• isIterable
• isMap
• isMobile
• isNaN
• isNegative
• isNil
• isNode
• isNotStringAndIterable
• isNull
• isNumber
• isNumeric
• isNumericFloat
• isNumericInt
• isObject
• isOdd
• isPlainObject
• isPositive
• isPrimitive
• isPrintableASCII
• isPromise
• isPromiseLike
• isProtoPath
• isRegExp
• isSafari
• isSet
• isString
• isSymbol
• isTouchEvent
• isTransferable
• isTrue
• isTypedArray
• isUUID
• isUUIDv4
• isUint32
• isUndefined
• isZero

Status

STABLE - used in production

Search or submit any issues for this package

Installation

yarn add @thi.ng/checks

ESM import:

import * as ch from "@thi.ng/checks";

Browser ESM import:

<script type="module" src="https://esm.run/@thi.ng/checks"></script>

JSDelivr documentation

For Node.js REPL:

const ch = await import("@thi.ng/checks");

Package sizes (brotli'd, pre-treeshake): ESM: 2.03 KB

Dependencies

None

API

Generated API docs

TODO

Authors

• Karsten Schmidt (Main author)
• Gavin Cannizzaro
• Jay Zawrotny

If this project contributes to an academic publication, please cite it as:

@misc{thing-checks,
  title = "@thi.ng/checks",
  author = "Karsten Schmidt and others",
  note = "https://thi.ng/checks",
  year = 2016
}

License

2016 - 2026 Karsten Schmidt // Apache License 2.0