React TODO app localStorage

by Kensuke Nagae

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.13.1/JSXTransformer.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.13.1/react-with-addons.js"></script>
<script src="https://facebook.github.io/react/js/jsfiddle-integration.js"></script>

<div id="container">
    <!-- This element's contents will be replaced with your component. -->
</div>

CSS

li {
    cursor: pointer;
}

JavaScript 1.7

var TodoItem = React.createClass({
  done: function() {
    this.props.done(this.props.todo);
  },

  render: function() {
    return <li onClick={this.done}>{this.props.todo}</li>
  }
});

var TodoList = React.createClass({
  getInitialState: function() {
    return {
      todos: this.props.todos
    };
  },

  add: function() {
    var todos = this.props.todos;
    todos.push(React.findDOMNode(this.refs.myInput).value);
    React.findDOMNode(this.refs.myInput).value = "";
    localStorage.setItem('todos', JSON.stringify(todos));
    this.setState({ todos: todos });
  },

  done: function(todo) {
    var todos = this.props.todos;
    todos.splice(todos.indexOf(todo), 1);
    localStorage.setItem('todos', JSON.stringify(todos));
    this.setState({ todos: todos });
  },

  render: function() {
    return (
      <div>
        <h1>Todos: {this.props.todos.length}</h1>
        <ul>
        {
          this.state.todos.map(function(todo) {
            return <TodoItem todo={todo} done={this.done} />
          }.bind(this))
        }
        </ul>
        <input type="text" ref="myInput" />
        <button onClick={this.add}>Add</button>
      </div>
    );
  }
});

var todos = JSON.parse(localStorage.getItem('todos')) || [];

React.render(
    <TodoList todos={todos} />,
    document.getElementById('container')
);