ES6 tricks to make life easy with javascript.

sample.js

includes.
=========
  // old way was using indexOf() functio.
let a = "ABCD"
console.log(a.includes("A")) // true
console.log(a.includes("Z")) // false

Remove unwanted properties from object.
=======================================
  
// old way was using delete keyword.
let a = { a1: 444, a2: 555, a3: 666}
let {a1, a2 ...b} = a;
console.log(b) // { a3: 666 }
  
// https://developit.github.io/preact-perf/ => batchmark test for different frontend library and frameworks

Swap values
=============
  
let a = 1;
let a2 = 2;
console.log(a, a2); // 1 2
[a1, a2] = [a2, a1];
console.log(a, a2); // 2 1