Geremi Wanga

Controls the JavaScript is single threaded, which means it handles one task at a time. To prevent blocking the main thread, it uses asynchronous features like callbacks, promises, and async await. These tools allow JavaScript to manage operations like fetching data or reading files without freezing the browser. The event loop plays a crucial role by continuously checking if the call stack is empty and then pushing deferred functions (like .then() or setTimeout) from the queue to the stack. Mastering async concepts is crucial for writing responsive, non blocking code in modern web applications.

JavaScript adds JavaScript is a prototype based language, which means inheritance is achieved via prototypes rather than classical classes (though ES6 classes abstract this behavior). Every object has an internal link to another object called its prototype, and it inherits properties and methods from that prototype. The this keyword refers to the object that is currently executing the function and behaves differently depending on how the function is called (regular function, method, arrow function, etc.). Understanding objects, the prototype chain, and the behavior of this is essential for writing efficient and scalable code in JavaScript.