Spread Operator

Added in ES 2015
The array spread operator is symbolized with three dots ( ... )

Combining Arrays

const myArray1 = ['mon', 'tue'] 
const myArray2 = ['wed', 'thu', 'fri']  
const myArray3 = [...myArray1, ...myArray2] 

Using array destructuring (added in ES 2015)

const myArray2 = ['wed', 'thu', 'fri']  
var [firstItem, ...remainingItems] = myArray2 
console.log(remainingItems); 

This operator converts an array to a list of items.

const myArray = ['mon', 'tue', 100] 
const newArray = [...oldArray]; 

Passing a list of arguments to a function

You can also use the spread operator to collect function arguments as an array.

const myArguments = ['arg1', 'arg2', 100] 

myFunction(...myArguments); 
function myFunction1(text1, text2, number1) { 
} 

this could also be done using array destructuring