You Might Not Know These: 5 Important and Lesser-Known Features in JavaScript

JavaScript has several advanced features that can enhance coding efficiency and improve code quality. One such feature is the optional chaining operator (?.), which prevents errors when accessing nested objects. The nullish coalescing operator (??) provides a default value when a variable is null or undefined. Debouncing functions can significantly improve performance by limiting the number of function calls during user interactions. Proxies allow for customized behaviors on objects by intercepting and redefining operations. Sets and WeakSets can be used to prevent duplicate values in collections. These features can make JavaScript code more efficient, clean, and maintainable.