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Descriptions and status summaries are generated by an AI from publicly available data. They may not reflect the current state of a project. More on AI-extracted content. Project owners can request a correction or removal by emailing info@devupdate.io.
is-symbol is a small JavaScript utility that answers the question, “Is this an ES6 Symbol value?”. It can be used in Node.js or other JS code to test whether a given input is a Symbol, including cases like Symbol.iterator and Symbol.for.
The source shows signs of continued activity (upstream push dated 2026-03-16), but the most recent documented package updates appear to be v1.1.1 from 2024-12-13, so tagged update cadence is relatively infrequent as of 2026-09-10.
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This JavaScript module checks whether a given value is a JS SharedArrayBuffer. It’s designed to work across realms and iframes without relying on `instanceof` or mutable properties, and can be used for type guards in code that needs to distinguish SharedArrayBuffer values.
The module appears quiet rather than actively maintained, with the most recent upstream push on 2026-01-13 and the last published update on 2024-12-18 (a gap of well over a year from today, 2026-09-10).
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This is a small JavaScript utility that checks whether a value is a JS Set (using cross-realm or iframe-safe detection). It is useful for validating inputs and distinguishing Sets from other collection types like Map, WeakSet, and WeakMap.
Maintenance status: The package does not show frequent published updates. The most recent tagged update is v2.0.3 on 2024-03-08, while the last upstream push was 2026-01-13, suggesting some repository activity but not recent consumer-facing update activity.
Last release:
is-regex is a JavaScript module that checks whether a given value is a JS regular expression, including cases that work across realms and iframes. It can be useful in validation logic where you need to distinguish regex objects from other values, for example returning true for /a/g and new RegExp('a','g').
Maintenance status: There is evidence of upstream activity (last upstream push on 2026-04-08), but the most recent published updates shown are v1.2.1 on 2024-12-12 and v1.2.0 on 2024-11-30, so relative to today (2026-09-10) the package appears to be in a quiet or maintenance mode.
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is-plain-obj is a small utility that checks whether a JavaScript value is a plain object. It returns true for objects created with {}, new Object(), or Object.create(null), and false for arrays and other non-plain types.
This repository appears quiet or in maintenance mode as of today (2026-09-10). The most recent published update listed is v4.1.0 on 2022-06-15, and the last upstream push was 2024-05-04, with no more recent version updates shown.
Last release:
This module checks whether a value is a JavaScript Number object, including boxed numbers like new Number(42). It is designed to work across different realms or iframes, which can be useful for type checks in browser or mixed-window environments.
Maintenance status: Evidence shows the project is not completely abandoned, with an upstream push on 2025-12-30. However, the most recent published updates for the package are v1.1.1 (2024-12-16), so overall it looks low-cadence/maintenance-oriented rather than actively iterating day to day.
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`is-number` is a JavaScript and Node.js utility that returns `true` for values that are numbers or string representations of finite numbers, otherwise `false`. It is useful for validating regex matches, user input, and parsed strings where it is not always reliable to determine whether a value is truly numeric.
The source appears quiet rather than actively maintained as of 2026-09-10, with the most recent upstream push dated 2022-09-15 and the newest documented code version update shown here dating back to 2018-07-04.
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Checks whether a JavaScript value is negative zero (-0). Useful when you need to distinguish -0 from 0 using a small helper, though the README warns that “=== will lie to you.”
Maintenance status: Not clearly actively maintained, the most recent published update in the provided data is v2.0.3 (2024-02-19). There is evidence of an upstream push on 2025-12-30, but no corresponding published updates are shown here, so the project looks mostly quiet with only occasional activity.
Last release:
This is a small JavaScript utility that checks whether a given value is a JS Map. It’s designed to work across realms and iframes, which makes it useful when validating Map values in different execution contexts.
The source appears quiet, with the most recent published update tag seen in the provided history at v2.0.3 (2024-03-08). Although there was an upstream push on 2025-12-30, the available data does not show additional tagged updates after 2024-03-08, so active maintenance is not clearly evidenced.
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is-hexadecimal is a small ESM JavaScript function that checks whether a given code point or the first character of a string is a hexadecimal character (a-f, 0-9, case insensitive). It is useful as a shared helper in other packages when you need consistent hexadecimal character validation.
The source does not show evidence of active maintenance in the recent period, with the last known upstream push on 2022-11-23 and the latest summarized updates in 2021, which is several years ago relative to 2026-09-10.
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is-glob is a small JavaScript utility that checks whether a string “looks like” a glob pattern or an extglob pattern, returning true or false. It helps you conditionally use glob-handling modules (for example node-glob) so code can run faster and avoid unnecessary initialization when the input is not actually a glob.
Maintenance status: No recent evidence of active development as of today (last upstream push was 2022-12-29, and the most recent shown updates are from 2021), so the source appears quiet/dormant (maintenance mode) rather than actively maintained.
Last release:
This is a small JavaScript utility that checks whether a given value is a native ES6 generator function. It’s useful when you need to detect generator functions (for example, to handle generator-based control flow differently).
Maintenance status: The project shows occasional active work, with recent updates in late 2025 and an upstream push on 2025-12-30, but there have been no apparent updates since then (as of 2026-09-10), so it reads as quiet or maintenance mode rather than continuously active.
Last release:
This JavaScript module checks whether a given value is a JS FinalizationRegistry, with support for cross-realm usage like iframes. It is useful for runtime type checking of FinalizationRegistry instances.
The source (inspect-js/is-finalizationregistry) appears quiet, with its most recent upstream update on 2024-12-17, which is well over 18 months ago relative to 2026-09-10, suggesting it is not actively maintained.
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is-extglob is a JavaScript utility that returns true if a string contains an extglob pattern, and false otherwise. It is useful for detecting extended glob syntax in input strings, with support for escaped extglobs returning false.
The source repo (micromatch/is-extglob) appears quiet and not actively maintained, with the last upstream push on 2019-05-25, and no updates shown after 2.1.1 in 2016 (as of today, 2026-09-10).
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is-extendable is a JavaScript utility that returns whether a value is one of the types that can be extended (array, plain object, or function). It is useful for safely deciding if a value should support key-based extension.
This GitHub source appears largely dormant, with the last upstream push on 2021-08-20, and no updates since 2017 (latest shown version 1.0.1 on 2017-09-11), so it does not look actively maintained as of 2026-09-10.
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is-decimal is a small ESM JavaScript function that checks whether a given character (string) or code point (number) is an ASCII decimal digit. It is useful as a shared helper for validating numeric characters, especially when used by related packages.
Maintenance status: Evidence suggests the project is quiet or dormant, with the last upstream push on 2022-11-23 and the most recent listed update being 2.0.1 from 2021-11-04, so it does not appear actively maintained as of 2026-09-10.
Last release:
Checks whether a given value is a JavaScript Date object, returning true for `new Date()` and false for other types. It is designed to work across realms and iframes, even with ES6 `@@toStringTag`, making it useful for type checks in mixed browser or execution contexts.
Maintenance status: Evidence suggests occasional maintenance rather than active, continuous development. The latest published updates were v1.1.0 on 2024-12-13, and there was an upstream push on 2025-12-30, but no newer published updates are shown since then.
Last release:
A small JavaScript utility that checks whether a value is a JS DataView. It is designed to work across realms and iframes without relying on instanceof or mutable properties. Useful when you need a reliable DataView type check in runtime code.
The source appears to be quiet and not actively maintained, with the last upstream push on 2024-12-19 and no further published updates since then (about 21 months as of 2026-09-10).
Last release: