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Chips Input

Group objects in an array by a property

Build a React Accordion component that allows users to expand and collapse sections of content.

Guess the number

Write a function that arranges a list of non-negative integers to form the largest possible number

Write a function `countVowels` that takes a string as input and returns the number of vowels in that string.

Implement the function `once(fn)` which accepts another function `fn` and returns a new function.

Implement a function that transforms a function of multiple arguments into a sequence of functions each taking a single argument (currying).

You have to build a simple Counter App in React that also shows the previous count value.

Implement a Stack data structure in JavaScript.