The usual way to run a Node.js program is to run the globally available
node command (once you install Node.js) and pass the name of the file you want to execute.
If your main Node.js application file is
app.js, you can call it by typing:
Above, you are explicitly telling the shell to run your script with
Above, we are explicitly giving the absolute path of interpreter. Not all operating systems have
node in the bin folder, but all should have
env. You can tell the OS to run
env with node as parameter:
To use a shebang, your file should have executable permission. You can give
app.js the executable permission by running:
chmod u+x app.js
While running the command, make sure you are in the same directory which contains the
To execute a string as argument you can use
On Windows, using cmd.exe a single quote will not work correctly because it only recognizes double
" for quoting. In Powershell or Git bash, both
" are usable.
node -e "console.log(123)"
As of nodejs V16, there is a built-in option to automatically restart the application when a file changes. This is useful for development purposes. To use this feature, you need to pass the `--watch' flag to nodejs.
node --watch app.js
So when you change the file, the application will restart automatically.
--watch flag documentation.