Prerequisites

You need to have the latest versions of Node.js and Git installed before you do anything given below.

Coding guidelines

You should ensure that your code meets the coding guidelines listed below

Spacing:
Use two spaces for indentation. No tabs.
Quotes:
Single-quoted strings are preferred to double-quoted strings; however, please use a double-quoted string if the value contains a single-quote character to avoid unnecessary escaping.
Variable declaration:
Don't use var, use let and const to declare your variables.

Guidelines are enforced using ESLint:

$ npm run lint

Any code change should be submitted as a pull request, based on dev branch. The description should explain what the code does.

First fork this repo on GitHub
After that, clone the repo on your local machine
Change your current directory to your cloned repo
Install the necessary npm dependencies by running npm install
Start the local dev server by running npm start
Create a new branch from the dev branch that matches the change that you are doing
Make your changes
Test and lint your changes
Commit your changes
Create a pull request