BIP39 (Mnemonic code for generating deterministic keys) input validation demo:

This is a demo for live input-feedback. It is designed with BIP39 mnemonic codes in mind. Users type their code (e.g. oblige post bean mule hard easily actress woman recall know error junior upon canoe struggle) and the input field gives live feedback by coloring words in green or red, based on whether they have been spelled correctly or not.