MobX-view.js

@observer
class TodoList extends React.Component {
  render() {
    const store = this.props.store;
    return (
      <div>
        { store.report }
        <ul>
        { store.todos.map(
          (todo, idx) => <TodoView todo={ todo } key={ idx } />
        ) }
        </ul>
        { store.pendingRequests > 0 ? <marquee>Loading...</marquee> : null }
        <button onClick={ this.onNewTodo }>New Todo</button>
        <small> (double-click a todo to edit)</small>
        <RenderCounter />
      </div>
    );
  }

  onNewTodo = () => {
    this.props.store.addTodo(prompt('Enter a new todo:','coffee plz'));
  }
}

@observer
class TodoView extends React.Component {
  render() {
    const todo = this.props.todo;
    return (
      <li onDoubleClick={ this.onRename }>
        <input
          type='checkbox'
          checked={ todo.completed }
          onChange={ this.onToggleCompleted }
        />
        { todo.task }
        { todo.assignee
          ? <small>{ todo.assignee.name }</small>
          : null
        }
        <RenderCounter />
      </li>
    );
  }

  onToggleCompleted = () => {
    const todo = this.props.todo;
    todo.completed = !todo.completed;
  }

  onRename = () => {
    const todo = this.props.todo;
    todo.task = prompt('Task name', todo.task) || todo.task;
  }
}

ReactDOM.render(
  <TodoList store={ observableTodoStore } />,
  document.getElementById('reactjs-app')
);