es6.js

/*** ES6 Features ***/
// Let and Const
let variableName = "value"; // Block-scoped, can be reassigned
const constantName = "value"; // Block-scoped, cannot be reassigned
// Arrow Functions
const myFunction = (param) => {
	return param * 2;
}
// Template Literals
const greeting = `Hello, $(name)!` // Embedded expressions
// Destructuring Assignment
const { a, b} = obj; // Extracts properties from an object
const [x, y] = array; // Extracts values from an array
// Spread and Rest Operator
const newArray = [...arrayl, ...array2]; // Combines arrays
const newObj = {...obj1, ...obj2 }; // Combines objects

function sum(...numbers) {
	return numbers.reduce((acc, curr) => acc + curr, 0); // Rest parameter
}
// Default Parameters
function multiply(a, b = 1){
	return a * b;
}
// Promises
const promise = new Promise((resolve, reject) => {
	if (success) {
		resolve ("Success!");
	} else {
		reject ("Failure!");
	}
});

promise
•then ((response) => console. log(response))
•catch((error) =› console. log(error));

// Classes
class Animal {
	constructor (name) {
		this.name = name;
	}
	speak() {
		console.log(`${this.name) makes a noise.`);
	}
}
class Dog extends Animal {
	speak() {
		console. log(`${this.name) barks.`);
	}
}
const dog = new Dog ("Rex");
dog.speak(); // Rex barks.