How to import .json file as arguments to .js file and launch it using command line?

Question

I have a .json file stored in a local directory on my computer.

data.json

{ 
  "foo": "bar",
  "baz": "bat"
}

I want to load data.json as arguments somehow into a .js file that I also have stored locally on my computer. Then run it.

app.js

var foo = "bar",
    baz = "bat"; // Somehow, I need to import these arguments from data.json
// Then do stuff with them...

app.js is a pure javascript file (without access to an HTML "wrapper" or any JS libraries like jQuery, etc.).

I would like to use one of the following to call app.js:

Command line / shell script (including but not necessarily node.js),
AppleScript (Mac OS X Yosemite v.10.10.1), or
iMacros for Firebox bookmarklet.

How can I accomplish this?

What about updating data.jsonso that it looks like data = { ... }then adding <script type="text/javascript" src="data.json"></script> and then saying var mydata = JSON.parse(data);? — fedorqui
– fedorqui, Commented May 10, 2016 at 13:42
@fedorqui: I like the thought process. But would this really work as the question describes "without an HTML wrapper?" AFAIK, the <script> tag is only useable in HTML files not pure JS, correct? — Let Me Tink About It
– Let Me Tink About It, Commented May 10, 2016 at 14:04
Uhms, I guess you are right (I am not very familiar with JavaScript in general). Would this approach help you? Load JSON file locally using pure Javascript. It uses an XMLHttpRequest. — fedorqui
– fedorqui, Commented May 10, 2016 at 14:09

Community · Accepted Answer · 2017-05-23 11:47:16Z

2

If you are using node, just require the json.

// app.js
var data = require('./data.json');
var foo = data.foo // etc

In your command line you can just run

node app.js

Of course if your data json is in a different directory, adjust the path accordingly. You could also allow it to use any json by providing it as an argument (see here)

edited May 23, 2017 at 11:47

CommunityBot

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answered May 10, 2016 at 13:51

Andrei Nemes

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1 Comment

Andrei Nemes Over a year ago

I'm not using any library; op is happy with using node. please don't downvote just because you don't understand the question

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