mastodon/app/assets/javascripts/components/features/home_timeline/components/setting_text.jsx

import PropTypes from 'prop-types';
import ImmutablePropTypes from 'react-immutable-proptypes';

const style = {
  display: 'block',
  fontFamily: 'inherit',
  marginBottom: '10px',
  padding: '7px 0',
  boxSizing: 'border-box',
  width: '100%'
};

class SettingText extends React.PureComponent {

  constructor (props, context) {
    super(props, context);
    this.handleChange = this.handleChange.bind(this);
  }

  handleChange (e) {
    this.props.onChange(this.props.settingKey, e.target.value)
  }

  render () {
    const { settings, settingKey, label } = this.props;

    return (
      <input
        style={style}
        className='setting-text'
        value={settings.getIn(settingKey)}
        onChange={this.handleChange}
        placeholder={label}
      />
    );
  }

}

SettingText.propTypes = {
  settings: ImmutablePropTypes.map.isRequired,
  settingKey: PropTypes.array.isRequired,
  label: PropTypes.string.isRequired,
  onChange: PropTypes.func.isRequired
};

export default SettingText;