import React from 'react'; import { FormattedMessage } from 'react-intl'; import PropTypes from 'prop-types'; export default class ColumnBackButton extends React.PureComponent { static contextTypes = { router: PropTypes.object, }; handleClick = (event) => { // if history is exhausted, or we would leave mastodon, just go to root. if (window.history.state) { const state = this.context.router.history.location.state; if (event.shiftKey && state && state.mastodonBackSteps) { this.context.router.history.go(-state.mastodonBackSteps); } else { this.context.router.history.goBack(); } } else { this.context.router.history.push('/'); } } render () { return ( <button onClick={this.handleClick} className='column-back-button'> <i className='fa fa-fw fa-chevron-left column-back-button__icon' /> <FormattedMessage id='column_back_button.label' defaultMessage='Back' /> </button> ); } }