These are the front-end version of LeetCode questions, but with less emphasis on complicated algorithms and more focus on practical use cases. However, they can also be questions simply being the same LeetCode problem but you are required to answer in JavaScript.
Almost all existing utility functions you will be asked exist within the JavaScript language or famous third-party libraries like Lodash/Underscore, with the most famous being
debounce and throttle. However, Lodash's implementation is extremely over-engineered — reusing a lot of abstract functions and supporting weird and obscure use cases for older browsers; you're not expected to handle such edge cases within an interview setting.
