ES6 introduced essential features in JavaScript that modern developers rely on even in 2025.
Key ES6 features include let and const for block-scoped variables, arrow functions for shorter syntax, template literals for string interpolation, and destructuring for unpacking arrays or objects.
Additional important features include default parameters, rest and spread operators, enhanced object literals, promises for async operations, and modules for breaking code into reusable files.
These features have significantly enhanced code quality and efficiency, making JavaScript a powerful and modern tool.