Object:

let obj = {
  attr1: 'attr1',
  attr2: 123
}

Getters/Setters:

obj.attr1 = 'attr1'

var attr1 = 'attr1'
obj[attr1] = 'attr1'

Array as object:

let array = ['one','two',3]
let ele1 = array[0]
let num = array[2]

Function:

function func(var1) {
console.log(var1);
}

Set const from output of anonymous function

const newArray = (() => {
    return baseArray.map (
        m => {
            return { new_id : m.id, new_name : m.name }
        }
    )
}) ()

Printing using forEach:

<div>
    {newArray.map((m) => <p>{m.new_name}</p>)}
</div>

 

Fetching from a URL

fetch(URL).then (res => res.text())
      .then(text => {)...

Pattern Matching

Place Holder