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I've seen some posts that refer to running npm with a -d argument. For example, this issue refers to doing npm -d install coffee-script. There are a few other pages that also refer to this syntax, including the install instructions for at least one npm package.

But I've been unable to find any documentation for this -d argument. The docs for npm install make no mention of -d, nor does the npm FAQ, nor do any of the other documentation pages I've looked through.

Does the -d option do anything? If so, what?

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  • 2
    I think that should be "npm i -D .........." which would be equivalent of "npm install --save-dev ............"
    – DevWL
    Commented Jun 10, 2017 at 8:00
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    @DevWL, did you read the other answers to this question? :-) -d and -D are different. stackoverflow.com/a/28463702/87399
    – Joe White
    Commented Jun 10, 2017 at 19:32

1 Answer 1

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It's a shortcut for --loglevel info

See the Shorthands and Other CLI Niceties section:

  • -d: --loglevel info
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    Ah... of course the command-line parameters wouldn't be documented on the pages that talk about command-line parameters or the commands they apply to. Silly me!
    – Joe White
    Commented Mar 3, 2012 at 15:07
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    @JoeWhite Ugh, was just tearing my hair out trying to figure out what it is. Google isn't exactly friendly to short command line options.
    – Alex B
    Commented Jun 26, 2013 at 3:02
  • Makes much more sense to be under "misc"... Just ask Google if they agree: google.com/search?q=npm+install+-d
    – Seb Nilsson
    Commented Jan 7, 2014 at 10:52
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    What was debug then again? Ahh, turns out there is no --loglevel debug but "verbose" (-dd) and "silly" (-ddd). Fair enough.
    – Philzen
    Commented Apr 3, 2014 at 23:09

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