SyntaxError: Use of const in strict mode in Heroku

Question

I am following a tutorial from a book, we have just set up a heroku based mongodb database alongside a local database. The local app works fine but when I run it on Heroku I get the following error

/app/node_modules/mongoose/lib/index.js:7
const Schema = require('./schema');
^^^^^
SyntaxError: Use of const in strict mode.

I'm guessing that the fact the version of Node on Heroku is different to my localhost but maybe it is not.

when I do node --version on my local I get

v8.9.3

when I do it on Heroku I get

v0.10.48

which is a bit confusing.

How can I fix this so that it runs on Heroku. I have contacted their support but they sent me here as it is an application issue.

Thanks

Answer 1

Refer to Heroku documentation . If you want to have a specific version of nodejs, which for example supports const use the engines section of your package.json .

Sample from Heroku:

{
  "name": "myapp",
  "description": "a really cool app",
  "version": "1.0.0",
  "engines": {
    "node": "8.9.4"
  }
}