command line arguments to Node.js

Question

I've read several related questions here but still can't figure out what I'm doing wrong. Here's my script (simple.js):

    var x = process.argv[2]
    console.log(x);

now when I type in the REPL

    .load simple.js Hello

the REPL answers

 Failed to load:simple.js Hello

but I've done this (simple2.js):

    console.log(process.argv);

and when I .load this file in REPL it answers

    > console.log(process.argv);
    [ 'C:\\Program Files\\nodejs\\node.exe' ]
    undefined

Just tested it: I don't think the REPL .load is designed for this sort of thing. You probably have to use the standard node simple.js Hello in terminal. — gcampbell
– gcampbell, Commented Jul 5, 2016 at 17:24

Tamas Hegedus · Accepted Answer · 2016-07-05 17:24:53Z

1

You can't pass command line args to .load. The second case didn't fail because you didn't pass one.

If you want to use cmdline args, just use the OS terminal and enter node simple.js Hello.

answered Jul 5, 2016 at 17:24

Tamas Hegedus

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peteb · Accepted Answer · 2016-07-05 17:31:15Z

0

.load inside the Node REPL just loads a file. From the REPL docs it looks like the primary use case of .load is to restore a REPL session that was saved using .save.

In your succesful example its simply showing what process.argv is set to when you ran node in your terminal

edited Jul 5, 2016 at 17:31

answered Jul 5, 2016 at 17:25

peteb

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