Simple Todo list app using React and ES6 with functions delete a todo and/or mark a todo as done

todolist.jsx

import React from 'react';

/*
Todo app structure

TodoApp
	- TodoHeader
	- TodoList
    - TodoListItem #1
		- TodoListItem #2
		  ...
		- TodoListItem #N
	- TodoForm
*/
var todoItems = [];
todoItems.push({index: 1, value: "learn react", done: false});
todoItems.push({index: 2, value: "Go shopping", done: true});
todoItems.push({index: 3, value: "buy flowers", done: true});

class TodoList extends React.Component {
  render () {
    var items = this.props.items.map((item, index) => {
      return (
        <TodoListItem key={index} item={item} index={index} 
        	removeItem={this.props.removeItem} 
        	markTodoDone={this.props.markTodoDone} />
      );
    });
    return (
      <ul className="list-group"> {items} </ul>
    );
  }
}
  
class TodoListItem extends React.Component {
  constructor(props) {
    super(props);
    this.onClickClose = this.onClickClose.bind(this);
    this.onClickDone = this.onClickDone.bind(this);
  }
  onClickClose() {
    var index = parseInt(this.props.index);
    this.props.removeItem(index);
  }
  onClickDone() {
    var index = parseInt(this.props.index);
    this.props.markTodoDone(index);
  }
  render () {
    var todoClass = this.props.item.done ? 
        "done" : "undone";
    return(
      <li className="list-group-item ">
        <div className={todoClass}>
          <span className="glyphicon glyphicon-ok icon" aria-hidden="true" 
          	onClick={this.onClickDone}></span>
          {this.props.item.value}
          <button type="button" className="close" 
          	onClick={this.onClickClose}>&times;</button>
        </div>
      </li>     
    );
  }
}

class TodoForm extends React.Component {
  constructor(props) {
    super(props);
    this.onSubmit = this.onSubmit.bind(this);
  }
  componentDidMount() {
    React.findDOMNode(this.refs.itemName).focus();
  }
  onSubmit(event) {
    event.preventDefault();
    var input = React.findDOMNode(this.refs.itemName);
    var newItemValue = input.value;
    if(newItemValue) {
      this.props.addItem({newItemValue});
      input.value = '';
    }
  }
  render () {
    return (
      <form onSubmit={this.onSubmit} className="form-inline">
        <input type="text" ref="itemName" className="form-control" 
        	placeholder="add a new todo..."/>
        <button type="submit" className="btn btn-default">Add</button> 
      </form>
    );   
  }
}
  
class TodoHeader extends React.Component {
  render () {
    return <h1>Todo list</h1>;
  }
}
  
class TodoApp extends React.Component {
  constructor (props) {
    super(props);
    this.addItem = this.addItem.bind(this);
    this.removeItem = this.removeItem.bind(this);
    this.markTodoDone = this.markTodoDone.bind(this);
    this.state = {todoItems: todoItems};
  }
  addItem(todoItem) {
    todoItems.unshift({
      index: todoItems.length+1, 
      value: todoItem.newItemValue, 
      done: false
    });
    this.setState({todoItems: todoItems});
  }
  removeItem (itemIndex) {
    todoItems.splice(itemIndex, 1);
    this.setState({todoItems: todoItems});
  }
  markTodoDone(itemIndex) {
    var todo = todoItems[itemIndex];
    todoItems.splice(itemIndex, 1);
    todo.done = !todo.done;
    todo.done ? todoItems.push(todo) : todoItems.unshift(todo);
    this.setState({todoItems: todoItems});  
  }
  render() {
    return (
      <div id="main">
        <TodoHeader />
        <TodoList items={this.props.initItems} 
        	removeItem={this.removeItem} 
        	markTodoDone={this.markTodoDone}/>
        <TodoForm addItem={this.addItem} />
      </div>
    );
  }
}

React.render(<TodoApp initItems={todoItems}/>, document.getElementById('app'));