# just > A V8 JavaScript runtime for Linux. > More information: . - Start a REPL (interactive shell): `just` - Run a JavaScript file: `just {{path/to/file.js}}` - Evaluate JavaScript code by passing it as an argument: `just eval "{{code}}"` - Initialize a new project in a directory of the same name: `just init {{project_name}}` - Build a JavaScript application into an executable: `just build {{path/to/file.js}} --static`