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<!DOCTYPE html>
<html>
<head>
<script src="//fb.me/react-0.13.1.js"></script>
  <meta charset="utf-8">
  <title>React Hello World w/ JSBin</title>
</head>
<body>
  <div id="react_example"></div>
</body>
</html>
 
​
class AddTodo extends React.Component {
  constructor(){
    super();
    this.state = {text: ''};
  }
  onTextChanged(e){
    this.setState({text:e.target.value});
  }
  addHandler(){
    this.props.addTodo(this.state.text);
  }
  render() {
    return(
      <div>
        <input type="text" onChange={(e)=>this.onTextChanged(e)} />
        <button onClick={()=>this.addHandler()}>Add</button>
      </div>
    )
  }
}
​
class Todos extends React.Component {
  constructor(){
    super();
    this.state = {data: ['write book','wash clothes','jogging']};
  }
  addTodo(item){
    const newData = [...this.state.data, item]; //problem is here
    this.setState({ data: newData }); //problem is here
    console.log(this.state.data)
  }
  render() {
    return (      
      <div>
        <AddTodo addTodo={(item)=>this.addTodo(item)}/>
        <ul>
         {this.state.data.map((item)=><TodoItems key={item} item={item}/>)}
        </ul>
      </div>
    ); 
  }
}
​
class TodoItems extends React.Component {
  constructor(props){
    super()
    this.state = {
      text: props.item,
      isEditing: false
    };
  }
  onClickEdit(){
    this.setState({isEditing: !this.state.isEditing});
  }
  onSaveEdit(e){
    this.setState({
        isEditing: false,
        text: this.state.text
      });
  }
  onTextChanged(e){
    this.setState({text: e.target.value});
  }
  onEnter(e){
    if(e.charCode === 13){
      this.setState({
        isEditing: false,
        text: this.state.text
      });
    }
  }
  render(){ 
    return(
      <div>
      
      <li>
      {this.state.isEditing ? '' : <span>{this.state.text}</span>}
​
      {this.state.isEditing ? <span><input value={this.state.text} onKeyPress={(e)=>this.onEnter(e)} 
    type="text" onChange={(e)=>this.onTextChanged(e)}/></span> :''}
  &nbsp;&nbsp;
      {this.state.isEditing ? '' : <button onClick={()=>this.onClickEdit()}>Edit</button>}
​
      {this.state.isEditing ? <button onClick={()=>this.onSaveEdit()}>Save</button> : ''}
      </li>
      </div>
    )
  }
}
​
React.render(
  <Todos />,
  document.getElementById('react_example')
);
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