In a Promise, when an error occurs and is not caught, the Promise is rejected. This can lead to unhandled promise rejections, causing issues in the application. Understanding how to handle promise rejections is crucial in asynchronous programming with Promises.

To catch errors in an async function, you should use a try...catch statement. This helps in graceful error handling and prevents unhandled promise rejections.

No, async functions cannot be used as constructors for new objects. Async functions always return a Promise, and using them with the new keyword will result in a TypeError. Constructors should return objects, not Promises.

In JavaScript, the correct syntax for iterating over an array using a for...of loop is for (const element of array). The of keyword is used to loop over the values in an iterable object like an array.

To access a static property within a class method, you use the class name followed by a dot and the property name. This is because static properties are associated with the class itself, not with instances, so you reference them through the class name.

The seal method in JavaScript can be used to prevent any further addition or deletion of properties on an object, including its prototype. This ensures that the prototype remains fixed and cannot be modified.

In a for...of loop, the variable declared using const cannot be reassigned in each iteration. The loop variable retains its value throughout the loop, making it unsuitable for situations where reassignment is needed for each iteration.

To dynamically import a module based on a variable, the variable's value is included inside the square brackets of the import statement. This feature is known as dynamic import expressions, allowing developers to specify the module path at runtime. By using square brackets, the JavaScript interpreter treats the import statement as a dynamic expression, enabling more flexibility in module loading. Understanding this syntax is essential for dynamically loading modules based on runtime conditions, enhancing the adaptability of the application.

If you try to import a named export that doesn't exist in the module, it will result in a runtime error. The import statement expects the named export to exist, and an attempt to import a non-existent export will throw an error.

Promises allow for chaining, which enhances code readability. Chained promises provide a more elegant and sequential way of handling asynchronous operations compared to nested callbacks, making the code more readable and maintainable.

Destructuring assignment in ES6 allows developers to extract specific values from nested data structures, making the code more concise and readable. By specifying the desired variables in the destructuring pattern, developers can directly access the required data, avoiding verbose syntax and improving code maintainability. This feature simplifies the process of working with complex API responses or nested objects, enhancing overall code efficiency and clarity.

In object destructuring, the rest operator (...) is used to collect the remaining properties of an object into a new array. This allows you to extract specific properties while capturing the rest in a convenient variable, often referred to as an array or an object.