import React from 'react'; import { FormattedMessage } from 'react-intl'; import PropTypes from 'prop-types'; import { Icon } from 'mastodon/components/icon'; import { createPortal } from 'react-dom'; export default class ColumnBackButton extends React.PureComponent { static contextTypes = { router: PropTypes.object, }; static propTypes = { multiColumn: PropTypes.bool, onClick: PropTypes.func, }; handleClick = () => { const { router } = this.context; const { onClick } = this.props; if (onClick) { onClick(); // Check if there is a previous page in the app to go back to per https://stackoverflow.com/a/70532858/9703201 // When upgrading to V6, check `location.key !== 'default'` instead per https://github.com/remix-run/history/blob/main/docs/api-reference.md#location } else if (router.route.location.key) { router.history.goBack(); } else { router.history.push('/'); } }; render () { const { multiColumn } = this.props; const component = ( ); if (multiColumn) { return component; } else { // The portal container and the component may be rendered to the DOM in // the same React render pass, so the container might not be available at // the time `render()` is called. const container = document.getElementById('tabs-bar__portal'); if (container === null) { // The container wasn't available, force a re-render so that the // component can eventually be inserted in the container and not scroll // with the rest of the area. this.forceUpdate(); return component; } else { return createPortal(component, container); } } } }