React Challenges Posts OTP Input Exercise Covering Focus, Paste, and Validation

React Challenges has published a new coding exercise that asks developers to build a six-field one-time-password input component. The challenge requires implementing auto-advancing focus as digits are typed, paste handling for full codes, and keyboard navigation using arrow and backspace keys. Non-numeric characters must be silently ignored, and the component should display verification status derived directly from the current input values rather than stored as separate state. A reset button must clear all fields and return focus to the first input. The exercise is designed to strengthen skills in imperative focus management and derived state, which are commonly needed in authentication, two-factor auth, and payment flows.