#Javascript

Explain the differences between 'let', 'const', and 'var' in JavaScript and their use cases.

Implement a debounced search functionality in a frontend application that minimizes the number of requests sent to the server while the user types in a search box.

Implement a polyfill for the Array.prototype.sort() method using Quick Sort. Explain how the recursion works in your implementation and what edge cases should be considered.

Implement a typeahead feature that suggests options based on user input. The implementation should allow the list to populate based on the search keyword and include a delete icon to clear the input field.

What are some of the key features introduced in ES6? Provide a brief overview and discuss the benefits of using these features in modern JavaScript development.