nyastodon/app/javascript/mastodon/features/ui/components/document_title.js

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import { PureComponent } from 'react';
import { connect } from 'react-redux';
import PropTypes from 'prop-types';
import { title } from 'mastodon/initial_state';
const mapStateToProps = state => ({
unread: state.getIn(['missed_updates', 'unread']),
});
export default @connect(mapStateToProps)
class DocumentTitle extends PureComponent {
static propTypes = {
unread: PropTypes.number.isRequired,
};
componentDidMount () {
this._sideEffects();
}
componentDidUpdate() {
this._sideEffects();
}
_sideEffects () {
const { unread } = this.props;
if (unread > 99) {
document.title = `(*) ${title}`;
} else if (unread > 0) {
document.title = `(${unread}) ${title}`;
} else {
document.title = title;
}
}
render () {
return null;
}
}