Home / Questions / 39398
Accepted
Nelson Torres
Asked: 2020-12-16 09:09:55 +0800 CST 2020-12-16 09:09:55 +0800 CST

How to get command line arguments in node.js?

  • 772

It's a simple thing to do with a bash, I would just search for $1it and have the first parameter sent, but with node I have no idea how it works and googleit didn't help me.

If I want to run something like:

node pepe.js "hello"

How do I receive that parameter in my program?

Greetings.

nodejs

1 Answers

  1. Best Answer

    process.argvis an array containing the command line arguments.

    The first element ( process.argv[0]) contains the path to the executable of node, the second element contains the name of the running javascript file, in this case pepe.js. The following arguments have the values ​​passed by the command line. In this case process.argv[2] === "hola".

    With the following example:

    process.argv.forEach((val, index) => {
  console.log(`${index}: ${val}`);
});

    Then running:

    $ node pepe.js uno dos=tres cuatro

    You would get the output:

    0: /ruta/a/bin/node
1: /ruta/a/pepe.js
2: uno
3: dos=tres
4: cuatro

    Official Documentation

    Salu2

    • 8