getify

class Foo {
   constructor(x) { this.foo = x; }
   hello() { console.log(this.foo); }
}

class Bar extends Foo {
  constructor(x) { super(x); this.bar = x * 100; }
  world() { console.log(this.bar); }
}

danieliser

/**
 * ECMA2015
 */
function convertHex(hexCode, opacity = 1){
    var hex = hexCode.replace('#', '');

    if (hex.length === 3) {
        hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
    }