Practice refactoring with ES2015 features.

CodeRoad is an open-sourced interactive tutorial platform for the Atom Editor. Learn more at CodeRoad.io.

• install the tutorial package

  npm install --save coderoad-es2015

• install and run the atom-coderoad plugin

Using let & const.

let allows you to declare variables that are limited in scope to the block, statement, or expression on which it is used.

This is unlike the var keyword, which defines a variable globally, or locally to an entire function regardless of block scope.

var global = true;
let blockScoped = true;

Writing basic functions continued.

We'll write two more basic functions, this time without any help.