Here are the key features introduced in ES7 (ECMAScript 2016) with detailed descriptions and examples:

1. Exponentiation Operator ():

• Provides a shorthand for calculating exponentials (x raised to the power of y).
• Syntax: base ** exponent

JavaScript

const result = 2 ** 4; // 16 (2 raised to the power of 4)
const squared = x ** 2; // Square of x

2. Array.prototype.includes():

• Checks if an array includes a certain element.
• Returns true if the element is found, false otherwise.

JavaScript

const numbers = [1, 2, 3];
const hasTwo = numbers.includes(2); // true
const hasFour = numbers.includes(4); // false


Key Points:

• ES7 was a smaller update compared to ES6, focusing on these two specific additions.
• These features further streamlined common operations and enhanced code readability.
• While limited in scope, they contribute to the ongoing evolution of JavaScript.