eslint/no-var Restriction
What it does
ECMAScript 6 allows programmers to create variables with block scope instead of function scope using the let and const keywords. Block scope is common in many other programming languages and helps programmers avoid mistakes.
Why is this bad?
Using var in an es6 environment triggers this error
Example
javascript
// error
var x = "y";
var CONFIG = {};
// success
let x = "y";
const CONFIG = {};