how does process.env.ROOT_URL work

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I'm following this sample and they use config.rootUrl = process.env.ROOT_URL || 'http://localhost:3000/'; I thought this would mean it would get the url of the page depending on the environment. When I use my app on heroku to go to fb. it reports an error Can't Load URL . I see when I hover the link somewhere it shows the localhost link and not the website name. So how does process.env.ROOT_URL work ?

or where do they define process.env.ROOT_URL

ROOT_URL is just an environment variable. On Heroku, you can set it like:

$ heroku config:set ROOT_URL='whateveryouwant'

node.js - how does process.env.ROOT_URL work, rootUrl = process.env.ROOT_URL || 'http://localhost:3000/'; I thought this would mean it would get the url of the page depending on the environment. When I use​  Accessing environment variables in the Node.js is supported out of the box. When your Node.js process boots up, it will automatically provide an access to all the existing environment variables by creating the env object as a property of the process global object. I am using Node.js version 11. Now, if you have not installed Node.js, then

ROOT_URL should be an environment variable, so when you run your app, it should look something like this:

user$ ROOT_URL="" node app.js 

If ROOT_URL is not declared, it will default to localhost:3000

Setting the ROOT_URL on development - help, I am using a Digital Ocean vps do to my Meteor development. ROOT_URL = "​"; console.log(process.env. Thanks Glasser. I tried --mobile-server but the app is still empty. BTW, is there any way to give client app some intial parameter. Like, I want to have some initial settings for the app (Free and Paid versions, for example), which use the same server/db instance.

in your terminal / command line

export ROOT_URL=http://localhost:3000/

then you can run your node script

node index.js

as mentioned by the previous answers process.env references all system variables available in the current terminal / command line session

so for instance, you could see the value of your HOME folder by doing the following


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Meteor: Full-Stack Web Application Development, If Mongo/Node/PhantomJS is already installed, you can change the preceding our env configuration would look like the following code: "env": { "ROOT_URL":  How does the t.join() work? public class TestTwo extends Thread { public static void How does angular-cli @ webpack work? I have used angular-cli with systemJS and am now comfortable with its build process,test cases & component interaction. recently I upgraded my angular-cli to [email protected] But I am pretty confused with