JavaScript ES6+ Features Every Developer Should Know

Modern JavaScript Features

ES6 (ES2015) and later versions introduced powerful features that make JavaScript more expressive and easier to work with.

Arrow Functions

Arrow functions provide a shorter syntax and lexical this binding:

const add = (a, b) => a + b;

Template Literals

Template literals allow embedded expressions and multi-line strings:

const message = `Hello, ${name}!`;

Destructuring

Extract values from arrays and objects more easily:

const { name, age } = user;
const [first, second] = array;

Spread and Rest Operators

The spread operator (...) expands iterables, while rest collects them:

const newArray = [...oldArray, newItem];
const sum = (...numbers) => numbers.reduce((a, b) => a + b);

Promises and Async/Await

Handle asynchronous operations more elegantly:

async function fetchData() {
  const response = await fetch('/api/data');
  return response.json();
}

Modules

Organize code with import and export statements:

import { Component } from 'react';
export default MyComponent;

Classes

ES6 classes provide a cleaner syntax for object-oriented programming in JavaScript.