# is-wsl > Check if the process is running inside [Windows Subsystem for Linux](https://msdn.microsoft.com/commandline/wsl/about) (Bash on Windows) Can be useful if you need to work around unimplemented or buggy features in WSL. Supports both WSL 1 and WSL 2. ## Install ```sh npm install is-wsl ``` ## Usage ```js import isWsl from 'is-wsl'; // When running inside Windows Subsystem for Linux console.log(isWsl); //=> true ```