The let keyword creates a block-scoped variable, so each iteration in a for...of loop has its own block scope. This helps prevent unintended variable hoisting and makes the code more predictable.

Yes, destructuring assignment in ES6 allows you to assign default values to variables. If the assigned value is undefined, the variable takes the default value specified. This feature enhances flexibility in handling variable assignments.

If you try to import a non-existent named export, it will result in an error at runtime. It's important to ensure that the named exports you are trying to import actually exist in the module.

In ES6, when importing a module, the resolution algorithm prioritizes searching the node_modules folder before checking the current directory. This allows for better organization of dependencies and avoids naming conflicts with local modules. It simplifies the module import process and enhances code maintainability by following a standardized approach to handle third-party libraries.

ES6 arrow functions, with their concise syntax, can make recursive functions shorter and more readable by eliminating the need for the 'function' keyword and providing implicit returns.

Tagged template literals provide a powerful mechanism for customizing string output, making them beneficial in scenarios where dynamic content manipulation is necessary, such as in i18n (internationalization) or code generation. Regular template literals are simpler and more suitable for static strings.

The yield* keyword in a generator function is used for delegating to another generator or iterable. It allows you to compose generators and is often used for iterating over iterable objects within the generator function. On the other hand, yield is used to pause the generator and yield a value to the caller.

When an async function throws an unhandled error, it results in a rejected Promise. The rejection carries the error information, and if not caught using a catch block or try...catch, it can lead to unhandled promise rejections. Understanding this behavior is essential for effective error handling in asynchronous code. Properly handling promise rejections ensures that errors are appropriately addressed, preventing unintended consequences in the application.

To catch HTTP errors when using the fetch API, you can use the catch method. This method is chained to the Promise returned by fetch and allows you to handle network errors, as well as HTTP errors (e.g., 404 or 500). By providing a callback function to catch, you can manage and respond to errors that may occur during the request.

Placing a try/catch block at the beginning of an async function allows you to catch and handle synchronous errors within the asynchronous context. This is important for comprehensive error handling in asynchronous code.