How to import js file in nodejs (in cloud9)

Question

This is a basic question, but I'm struggling to find the answer. I am trying to import a js file (located here: http://eloquentjavascript.net/code/ancestry.js) into my Cloud9 Nodejs IDE, but I don't know how to do it.

I have successfully imported the file into my library. However, I am unclear on what I am to do with the code added at the bottom of the file:

// `require(./path/to/ancestry.js)` will get you the array.
if (typeof module != "undefined" && module.exports)
  module.exports = ANCESTRY_FILE;

I tried adding it to the server.js file with no success.

Thanks in advance, josh

Did you try saving the file as is and instead call it inside another JS file, within the same directory, using var ancestry = require('./ancestry'); — Bwaxxlo
– Bwaxxlo, Commented Feb 2, 2016 at 17:45

Bwaxxlo · Accepted Answer · 2016-02-02 17:48:01Z

1

The code at the bottom is usually to check whether CommonJS is enabled (basically, is it Node.js or browser). As long as you have the ancestry file in a folder, make another file inside the same folder, e.g: list-ancenstry.js and write into it:

var ancestry = require("./ancestry"); 
console.log(ancestry) //Logs the array

answered Feb 2, 2016 at 17:48

Bwaxxlo

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4 Comments

Josh Over a year ago

Your suggestion worked. However, I cannot run the code in the immediate window (Javascript REPL). The following gets me a ReferenceError: var ancestry = JSON.parse(ANCESTRY_FILE)

Bwaxxlo Over a year ago

NO, run it using require. Make sure you read up on module imports in Node.js. Btw, whats your setup? It doesn't sound like a generic Node.js setup.

Josh Over a year ago

If I type 'var ancestry = require("./ancestry");' in the immediate window, I get 'ReferenceError: require is not defined'. As far as my set-up is concerned, I'm afraid I don't know how to answer that question. This is new to me. What information are you looking for?

Bwaxxlo Over a year ago

If require is undefined, it looks like your node setup needs some tweaking.

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