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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 appears to be in a low-activity maintenance state, with the latest published updates dated 2024-12-13 (v1.1.1) and no further versioned updates shown since then, despite an upstream push on 2026-03-16.
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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.
Maintenance/active status: The repository shows upstream activity as recently as 2026-01-13, which suggests it is not completely dormant, though the most recent published updates appear to be from 2024-12-18.
Last release:
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 repo shows an upstream push on 2026-01-13, but the most recently published updates are v2.0.3 (2024-03-08). Overall, this looks more like maintenance mode with limited consumer-facing publishing.
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').
Active maintenance: The upstream repo shows a recent push on 2026-04-08, which suggests it is not completely abandoned, though the most recent published updates we can see are older.
Last release:
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.
Maintenance status: Not actively maintained as of today. The last upstream push was 2024-05-04, and the most recent listed published update is v4.1.0 in 2022, indicating a long period with no new updates.
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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: Not clearly “actively maintained” as of today, because the most recent published updates appear to be v1.1.1 on 2024-12-16, with the latest recorded upstream push on 2025-12-30 but no corresponding new published update shown in the provided summaries.
Last release:
`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.
Maintenance status: The source appears largely in maintenance mode as of 2026-06-09. The most recent documented updates in the provided summary are from 2018, and the last upstream push shown is 2022-09-15.
Last release:
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 updates tag is v2.0.3 on 2024-02-19, and the latest evidence of ongoing work is an upstream push on 2025-12-30, but there are no corresponding tagged updates after 2024-02-19.
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 rather than actively maintained, with the last published update being v2.0.3 on 2024-03-08 (and no newer published updates shown as of 2026-06-09). An upstream push exists on 2025-12-30, but no corresponding update details are included here.
Last release:
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 last upstream push was on 2022-11-23, and the most recent listed update is 2.0.1 from 2021-11-04, so the project appears quiet or in maintenance mode rather than actively maintained as of 2026-06-09.
Last release:
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: Appears dormant or in maintenance mode, the last upstream push was 2022-12-29, and the most recent tagged update in the provided history is v4.0.3 (2021-09-29), which is long before today (2026-06-09).
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 repository shows recent activity in late 2025 (latest upstream push on 2025-12-30), and there have been multiple updates in 2025, indicating it is not clearly abandoned. However, there is no evidence of further updates in 2026 up to 2026-06-09.
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.
Maintenance status: The last upstream push was 2024-12-17, which is well over 1 year ago relative to 2026-06-09, so the source appears quiet/dormant rather than actively maintained.
Last release:
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.
Actively maintained: No, the most recent documented package updates are from 2016-12-11 (2.1.1), and the next provided entries are older. While there was an upstream push in 2019, no newer published updates are shown in the provided release summaries.
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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.
The repository appears quiet or in maintenance mode, with the last upstream push on 2021-08-20 and the most recent listed version update dating to 2017-09-11, so there is no evidence of active ongoing development as of 2026-06-09.
Last release:
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.
The source does not show recent activity relative to today (latest listed update 2.0.1 in 2021, and the upstream push was 2022-11-23), so it appears quiet or in maintenance mode rather than actively maintained.
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.
The source appears to have had recent repository activity (upstream push on 2025-12-30), but its last published update is v1.1.0 (2024-12-13), which is a long gap relative to today (2026-06-09). Overall, it looks more quiet or in maintenance mode than actively maintained.
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 repository appears effectively in maintenance mode or quiet: the most recent upstream push and the newest recorded update are from 2024-12, about 6 months before today (2026-06), with no newer updates shown in the provided history.
Last release: