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samchon/typia
Super-fast/easy runtime validators and serializers via transformation
MITAug 28, 2026 · metrics 2.10.0
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Catalogue tag
#is
Every repository in the public record carrying this tag — from its GitHub topics or the keywords its package registries publish. Health is measured under the same versioned methodology as the rest of the record.
71 records
npm
sindresorhus/file-type
Detect the file type of a file, stream, or data
MITSep 17, 2026 · metrics 2.10.0
npm
sindresorhus/is
Type check values
MITSep 16, 2026 · metrics 2.10.0
npm
stdlib-js/assert
Standard assertion utilities.
Apache-2.0Oct 19, 2026 · metrics 2.10.0
npm
jonschlinkert/isobject
Is the value an object, and not an array or null?
MITSep 16, 2026 · metrics 2.10.0
npm
seijikohara/switch-ts
Switch-case with support for complex conditions for TypeScript
MITSep 8, 2026 · metrics 2.10.0
npm
syntax-tree/unist-util-is
utility to check if a node passes a test
MITSep 16, 2026 · metrics 2.10.0
npm
inspect-js/is-accessor-descriptor
Returns true if a value has the characteristics of a valid JavaScript accessor descriptor.
MITSep 16, 2026 · metrics 2.10.0
npm
inspect-js/is-descriptor
Returns true if a value has the characteristics of a valid JavaScript descriptor. Works for data descriptors and accessor descriptors.
MITSep 15, 2026 · metrics 2.10.0
npm
jonschlinkert/is-plain-object
Returns true if the given value is an object created by the Object constructor.
MITSep 16, 2026 · metrics 2.10.0
npm
inspect-js/is-core-module
Is this specifier a node.js core module?
MITSep 16, 2026 · metrics 2.10.0
npm
inspect-js/is-generator-function
Is this an ES6 generator function?
MITSep 16, 2026 · metrics 2.10.0
npm
inspect-js/is-regex
Is this value a JS regex?
MITSep 16, 2026 · metrics 2.10.0
npm
sindresorhus/is-installed-globally
Check if your package was installed globally
MITOct 21, 2026 · metrics 2.10.0
npm
inspect-js/is-array-buffer
Is this value a JS ArrayBuffer? This module works cross-realm/iframe, does not depend on `instanceof` or mutable properties, and despite ES6 Symbol.toStringTag.
MITSep 16, 2026 · metrics 2.10.0
npm
inspect-js/is-date-object
Is this value a JS Date object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
MITSep 16, 2026 · metrics 2.10.0
npm
inspect-js/is-symbol
Is this an ES6 Symbol value?
MITSep 16, 2026 · metrics 2.10.0
npm
inspect-js/is-typed-array
Is this value a JS Typed Array? This module works cross-realm/iframe, does not depend on `instanceof` or mutable properties, and despite ES6 Symbol.toStringTag.
MITSep 16, 2026 · metrics 2.10.0
npm
sindresorhus/uint8array-extras
Useful utilities for working with Uint8Array (and Buffer)
MITSep 23, 2026 · metrics 2.10.0
npm
sindresorhus/valid-filename
Check if a string is a valid filename
MITOct 3, 2026 · metrics 2.10.0
npm
inspect-js/is-boolean-object
Is this value a JS Boolean? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
MITSep 16, 2026 · metrics 2.10.0
npm
inspect-js/is-data-descriptor
Returns true if a value has the characteristics of a valid JavaScript data descriptor.
MITSep 15, 2026 · metrics 2.10.0
npm
inspect-js/is-number-object
Is this value a JS Number object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
MITSep 16, 2026 · metrics 2.10.0
npm
inspect-js/is-arguments
Is this an arguments object? It's a harder question than you think.
MITOct 20, 2026 · metrics 2.10.0
npm
inspect-js/is-bigint
Is this an ES BigInt value?
MITSep 16, 2026 · metrics 2.10.0
npm
inspect-js/is-negative-zero
Is this value negative zero? === will lie to you.
MITSep 16, 2026 · metrics 2.10.0
npm
inspect-js/is-set
Is this value a JS Set? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
MITSep 16, 2026 · metrics 2.10.0
npm
inspect-js/is-weakset
Is this value a JS WeakSet? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
MITSep 16, 2026 · metrics 2.10.0
npm
sindresorhus/is-absolute-url
Check if a URL is absolute
MITSep 23, 2026 · metrics 2.10.0
npm
sindresorhus/is-builtin-module
Check if a string matches the name of a Node.js builtin module
MITOct 21, 2026 · metrics 2.10.0