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sindresorhus/is-interactiveJavaScript

Check if stdout or stderr is interactive

Last commit Nov 6, 2023

 (118 stars) (5 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-ioJavaScript

[DEPRECATED] Check if the runtime is io.js instead of Node.js

Last commit May 16, 2017

 (15 stars) (1 fork) (0 indexed issues) (0 open good first issues)
sindresorhus/is-ipJavaScript

Check if a string is an IP address

Last commit Aug 5, 2023

 (118 stars) (16 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-jpgJavaScript

Check if a Buffer/Uint8Array is a JPEG image

Last commit Jul 8, 2022

 (27 stars) (9 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-jxaJavaScript

Check if your code is running in a JXA environment

Last commit Sep 18, 2021

 (33 stars) (3 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-jxrJavaScript

Check if a Buffer/Uint8Array is a JPEG XR image

Last commit Sep 18, 2021

 (9 stars) (3 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-low-power-modeJavaScript

Check if the system is in low power mode

Last commit Jul 25, 2024

 (69 stars) (3 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-mdJavaScript

Check if a filepath is a Markdown file

Last commit May 4, 2021

 (22 stars) (7 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-network-errorJavaScript

Check if a value is a Fetch network error

Last commit May 8, 2026

 (160 stars) (10 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-npmJavaScript

Check if your code is running as an npm or yarn script

Last commit Sep 10, 2025

 (66 stars) (9 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-npm-cliJavaScript

Check if your code is running as an npm script

Last commit Sep 18, 2021

 (54 stars) (3 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-objJavaScript

Check if a value is an object

Last commit Apr 16, 2021

 (42 stars) (9 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-observableJavaScript

Check if a value is an Observable

Last commit Jun 6, 2022

 (43 stars) (8 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-onlineJavaScript

Check if the internet connection is up

Last commit Nov 15, 2025

 (1,361 stars) (89 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-online-cliJavaScript

Check if the internet connection is up

Last commit Sep 11, 2025

 (74 stars) (4 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-path-cwdJavaScript

Check if a path is the current working directory

Last commit May 10, 2025

 (22 stars) (9 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-path-in-cwdJavaScript

Check if a path is in the current working directory

Last commit May 3, 2021

 (23 stars) (6 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-path-insideJavaScript

Check if a path is inside another path

Last commit Sep 11, 2025

 (40 stars) (15 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-plain-objJavaScript

Check if a value is a plain object

Last commit May 4, 2024

 (104 stars) (9 forks) (0 indexed issues) (0 open good first issues)
sindresorhus/is-pngJavaScript

Check if a Buffer/Uint8Array is a PNG image

Last commit Jul 8, 2022

 (48 stars) (4 forks) (0 indexed issues) (0 open good first issues)