import React from 'react'; import PropTypes from 'prop-types'; import { length } from 'stringz'; export default class CharacterCounter extends React.PureComponent { static propTypes = { text: PropTypes.string.isRequired, max: PropTypes.number.isRequired, }; checkRemainingText (diff) { if (diff < 0) { return <span className='character-counter character-counter--over'>{diff}</span>; } return <span className='character-counter'>{diff}</span>; } render () { const diff = this.props.max - length(this.props.text); return this.checkRemainingText(diff); } }