JavaScript ES6+ Features for Beginners

JavaScript ES6+ Features for Beginners

JavaScript ES6, also known as ECMAScript 2015 , introduced a wide range of modern features that make coding more efficient, readable, and maintainable. In the years since, newer ECMAScript versions ( ES7, ES8, ES9, ES10 , and beyond) have added even more powerful capabilities. This guide explores all major ES6+ features for beginners, with practical examples and best practices to help you write modern JavaScript code confidently. 1. Let and Const ES6 introduced let and const for block-scoped variables, replacing var in most cases. 1.1 Let let age = 25; age = 26; // allowed console.log(age); 1.2 Const const pi = 3.14159; // pi = 3.14; // Error: cannot reassign a const variable console.log(pi); Use let for variables that change and const for constants or objects that should not be reassigned. 2. Template Literals Template literals allow multi-line strings and string interpolation using backticks ( ` ). const name = 'John'; const greeting = `Hello, ${name}! Welcome to ES6+ JavaScript.`; console…