New Features in JavaScript 2016
Supported in all modern browsers since March 2017 .
| Feature | Description |
|---|---|
| ** | Raises the first operand to the power of the second |
| **= | Raises the value of a variable to the power of the right operand |
| Array includes() | Checks if an element is present in an array |
Browser Support
JavaScript 2016 is supported in all modern browsers since March 2017 :
| Chrome 52 | Edge 15 | Firefox 52 | Safari 10.1 | Opera 39 |
|---|---|---|---|---|
| Jul 2016 | Apr 2017 | Mar 2017 | May 2017 | Aug 2016 |
ES 2016 is not supported in Internet Explorer.
Exponentiation Operator
The exponentiation operator ( ** ) raises the first operand to the power of the second operand.
Example
let x = 5;
let z = x ** 2;x ** y produces the same result as Math.pow(x, y) :
Example
let x = 5;
let z = Math.pow(x,2);Exponentiation Assignment
Example
let x = 5;
x **= 2;JavaScript Array includes()
ECMAScript 2016 introduced Array.includes to arrays.
This allows us to check if an element is present in an array:
Example
const fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.includes("Mango");