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Comprehensive TypeScript/JavaScript utility library with cross-environment support (Node.js, browser, web worker) providing helper functions, polyfills (ES5-ES2023), type checking utilities, and optimized implementations for better minification and code r
Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)
- array
- assert
- assertion
- async
- async function
- async-function
- asyncFunction
- bool
- boolean
- browser
- check
- check-type
- checking
- class
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TypeScript typeof utility helper with no dependencies.
- typescript
- util
- typeof
- type guards
- isArray
- isBase64
- isBoolean
- isDate
- isDateValid
- isDefined
- isError
- isFunction
- isGuid
- isInfinity
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Detect whether a value is an error.
ExtremeJS Utilities
helper tools for javascript validation
- Full code documentation
- code coverage
- jest tests
- validation
- data validation
- data type checker
- lodash alternative
- utilities
- utils
- library helpers
- tools
- isEmpty
- isArray
- arraySize
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An ESnext spec-compliant `Error.isError` shim/polyfill/replacement that works as far down as ES3
A utility library for type checks and type manipulation in JavaScript and TypeScript, providing functions to determine types and verify values like null, undefined, boolean, number, and more.
- types
- getInstanceType
- getType
- isArray
- isAsyncFunction
- isAsyncGeneratorFunction
- isBigint
- isBoolean
- isDate
- isError
- isFunction
- isGeneratorFunction
- isInfinity
- isMap
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Type detection beyond `typeof`
- typeof
- getType
- type detection
- isArray
- isAsyncFunction
- isBigInt
- isBlob
- isBoolean
- isCallable
- isCustomElement
- isDate
- isElement
- isElementCollection
- isEmptyObject
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Simple and light-weight JavaScript type checker that brings convenience!
- is-array
- isArray
- is-bigint
- isBigint
- is-blob
- isBlob
- is-boolean
- isBoolean
- is-date
- isDate
- is-error
- isError
- is-file
- isFile
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A node.js module to get, compare and check types
Check if the parameter is error
Type check in TypeScript
- type
- typescript
- is-arguments
- is-array
- is-array-buffer
- is-array-buffer-view
- is-blob
- is-boolean
- is-buffer
- is-date
- is-error
- is-file
- is-float32-array
- is-float64-array
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