Context: Event delegation is a pattern that allows handling events at a higher level in the DOM than the element that actually triggered the event. Answer Tip: Discuss how event delegation works by using the concept of event bubbling. Explain how it can be useful for managing events for dynamic content and give an example of implementing it using addEventListener.

Context: Closures are an important concept in JavaScript that refers to a function having access to variables from another function’s scope. Answer Tip: Describe how closures work by referring to how an inner function retains access to variables defined in its outer function even after the outer function has returned. Provide a simple example where a closure is used to create a private counter.

Context: Understanding the difference between these two operators is crucial as it relates to type coercion in JavaScript. Answer Tip: Explain that == compares values for equality after converting both to a common type (type coercion), while === checks for both value and type without conversion. Use examples to illustrate the difference, such as comparing 0 == false versus 0 === false.

Context: The this keyword is context-dependent in JavaScript and can refer to different things based on how a function is called. Answer Tip: Discuss how this behaves in different contexts, such as in global scope, within a function, as a method in an object, and in event handlers. Mention how bind, call, and apply can be used to explicitly set the value of this.

Context: Promises are an essential feature of modern JavaScript for handling asynchronous operations. Answer Tip: Describe what a promise is, its states (pending, fulfilled, rejected), and how then, catch, and finally are used to handle asynchronous operations. An example might include using a promise to fetch data from an API.