class Task extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      edit: false,
    };
  };
  edit = () => {
    this.setState ({edit: true});
  };
  remove = () => {
    alert ("Нажата кнопка удалить");
  };
  save = () => {
    var value = this.refs.newTxt.value;
    alert (value);
    this.setState ({edit: false})
  };
  rendNorm = () => {
    return (
      <div className="box">
        <div className="text">{this.props.children}</div>
        <button onClick={this.edit} className="btn light">Редактировать</button>
        <button onClick={this.remove} className="btn red">Удалить</button>
      </div>
    );
  };
  rendEdit = () => {
    return (
      <div className="box">
        <textarea ref="newTxt" defaultValue={this.props.children}></textarea>
        <button onClick={this.save} className="btn success">Сохранить</button>
      </div>
    );
  };
  render() {
    if (this.state.edit) {
      return this.rendEdit ();
    } else {
      return this.rendNorm ();
    }
  }
}