import React, { useState } from 'react'; import './PhonoChangeApplier.scss'; import ProtoLang from './components/ProtoLang'; import Features from './components/Features'; import Epochs from './components/Epochs'; const PhonoChangeApplier = () => { const [ lexicon, setLexicon ] = useState(['one']); const [ phonemes, setPhonemes ] = useState( { phoneme: [ 'feature' ] } ); const [ epochs, setEpochs ] = useState([{name: 'epoch 1', changes:['[+ feature]>[- feature]/_#']}]); return (