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78 repositories

which-typed-array
Public
Which kind of Typed Array is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.
JavaScript
•
MIT License
•6•11•1•0•Updated May 26, 2026May 26, 2026
is-equal
Public
Are these two values conceptually equal?
javascript is equal
javascript is equal
JavaScript
•
MIT License
•7•60•2•0•Updated May 21, 2026May 21, 2026
is-descriptor
Public
Returns true if a value has the characteristics of a valid JavaScript descriptor. Works for data descriptors and accessor descriptors.
nodejs javascript node
nodejs javascript node descriptor accessor accessor-descriptor data-descriptor
JavaScript
•
MIT License
•5•12•0•0•Updated May 12, 2026May 12, 2026
is-accessor-descriptor
Public
Returns true if a value has the characteristics of a valid JavaScript accessor descriptor.
nodejs javascript node
nodejs javascript node descriptor accessor accessor-descriptor
JavaScript
•
MIT License
•5•15•0•0•Updated May 10, 2026May 10, 2026
is-core-module
Public
Is this specifier a node.js core module?
node module core
node module core is
JavaScript
•
MIT License
•12•26•1•1•Updated May 5, 2026May 5, 2026
is-bigint
Public
Is this an ES BigInt value?
javascript brand is
javascript brand is ecmascript bigint
JavaScript
•
MIT License
•3•7•1•0•Updated Apr 29, 2026Apr 29, 2026
has-symbols
Public
Determine if the JS environment has Symbol support. Supports spec, or shams.
javascript es6 es2015
javascript es6 es2015 ecmascript symbols symbol has core-js symbol-support
JavaScript
•
MIT License
•7•18•1•1•Updated Apr 29, 2026Apr 29, 2026
object-inspect
Public
string representations of objects in node and the browser
javascript node browser
javascript node browser object inspect
JavaScript
•
MIT License
•45•161•4•4•Updated Apr 26, 2026Apr 26, 2026
has-tostringtag
Public
Determine if the JS environment has `Symbol.toStringTag` support. Supports spec, or shams.
javascript ecmascript symbols
javascript ecmascript symbols symbol tostringtag
JavaScript
•
MIT License
•4•5•1•0•Updated Apr 25, 2026Apr 25, 2026
hasOwn
Public
A robust, ES3 compatible, "has own property" predicate.
JavaScript
•
MIT License
•2•2•1•0•Updated Apr 17, 2026Apr 17, 2026
functions-have-names
Public
Does this JS environment support the `name` property on functions?
javascript environment functions
javascript environment functions property ie9 ie name ie10 ie11
JavaScript
•
MIT License
•2•9•1•0•Updated Apr 16, 2026Apr 16, 2026
is-regex
Public
Is this value a JS regex?
javascript is regex
javascript is regex regexp js-regex
JavaScript
•
MIT License
•10•24•1•0•Updated Apr 8, 2026Apr 8, 2026
is-nan
Public
ES6-compliant shim for Number.isNaN - the global isNaN returns false positives.
JavaScript
•
MIT License
•7•0•0•0•Updated Apr 7, 2026Apr 7, 2026
is-arguments
Public
Is this an arguments object? It's a harder question than you think.
javascript is object
javascript is object arguments
JavaScript
•
MIT License
•4•17•1•0•Updated Mar 20, 2026Mar 20, 2026
has-bigints
Public
Determine if the JS environment has BigInt support.
JavaScript
•
MIT License
•6•8•1•0•Updated Mar 19, 2026Mar 19, 2026
buffer-equal
Public
JavaScript
•
MIT License
•2•3•0•0•Updated Mar 19, 2026Mar 19, 2026
which-collection
Public
Which kind of Collection (Map, Set, WeakMap, WeakSet) is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.
javascript map set
javascript map set collection weakmap which weakset
JavaScript
•
MIT License
•4•10•1•0•Updated Mar 19, 2026Mar 19, 2026
typed-array-length
Public
Robustly get the length of a Typed Array.
JavaScript
•
MIT License
•3•8•1•0•Updated Mar 19, 2026Mar 19, 2026
which-boxed-primitive
Public
Which kind of boxed JS primitive is this?
JavaScript
•
MIT License
•3•7•1•0•Updated Mar 19, 2026Mar 19, 2026
object-is
Public
ES6-compliant shim for Object.is - differentiates between -0 and +0, and can compare to NaN.
JavaScript
•
MIT License
•8•0•0•0•Updated Mar 18, 2026Mar 18, 2026
has-named-captures
Public
Does the JS environment support named capture groups in regexes?
javascript regex regular-expression
javascript regex regular-expression capture group regular-expressions named
JavaScript
•
MIT License
•1•2•1•0•Updated Mar 16, 2026Mar 16, 2026
has-private-fields
Public
Determine if the JS environment has private fields (`class { #x; }`) support.
javascript ecmascript class
javascript ecmascript class private fields private-field
JavaScript
•
MIT License
•2•5•1•0•Updated Mar 16, 2026Mar 16, 2026
which-builtin-type
Public
What is the type of this builtin JS value?
JavaScript
•
MIT License
•2•3•1•0•Updated Mar 16, 2026Mar 16, 2026
node-deep-equal
Public
node's assert.deepEqual algorithm
nodejs javascript node
nodejs javascript node assert strict equal deepequal loose
JavaScript
•
MIT License
•106•793•4•0•Updated Mar 16, 2026Mar 16, 2026
is-symbol
Public
Is this an ES6 Symbol value?
javascript is symbol
javascript is symbol es6-symbol boxed
JavaScript
•
MIT License
•5•19•1•0•Updated Mar 16, 2026Mar 16, 2026
available-regexp-flags
Public
Which regular expression flags does the current environment support?
unicode regex regexp
unicode regex regexp sticky global multiline ignorecase flags dotall hasindices
JavaScript
•
MIT License
•2•6•1•0•Updated Mar 10, 2026Mar 10, 2026
available-typed-arrays
Public
Returns an array of Typed Array names that are available in the current environment.
JavaScript
•
MIT License
•4•3•1•0•Updated Mar 10, 2026Mar 10, 2026
.github
Public template
.github repo for inspect-js org
JavaScript
•
MIT License
•3•1•0•0•Updated Feb 25, 2026Feb 25, 2026
node-exports-info
Public
Info about node `exports` field support: version ranges, categories, etc.
JavaScript
•
MIT License
•2•1•1•0•Updated Jan 28, 2026Jan 28, 2026
is-weakref
Public
Is this value a JS WeakRef? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
JavaScript
•
MIT License
•3•3•1•0•Updated Jan 20, 2026Jan 20, 2026

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78 repositories

which-typed-array

is-equal

is-descriptor

is-accessor-descriptor

is-core-module

is-bigint

has-symbols

object-inspect

has-tostringtag

hasOwn

functions-have-names

is-regex

is-nan

is-arguments

has-bigints

buffer-equal

which-collection

typed-array-length

which-boxed-primitive

object-is

has-named-captures

has-private-fields

which-builtin-type

node-deep-equal

is-symbol

available-regexp-flags

available-typed-arrays

.github

node-exports-info

is-weakref

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78 repositories