React

by Lazaro Contreras

HTML

<div id="app"></div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

.open{
  background: red;
}

React

class TodoApp extends React.Component {
  constructor(props) {
    super(props)
    this.state = {
    	files: [
      	{ text: "Folder 1", level: 1 , open: false, isLeave: false},
        { text: "Folder 2", level: 2 , open: false, isLeave: false},
        { text: "Folder 2", level: 3 , open: false, isLeave: true},
        { text: "Folder 2", level: 2 , open: false, isLeave: true},
        { text: "Folder 3", level: 1 , open: false, isLeave: false},
        { text: "Folder 4", level: 1 , open: false, isLeave: false}
      ]
    }
  }
  
  render() {
    return (
      <div>
        <h2>Todos:</h2>
        <ol>
        {this.state.files.map(item => (
        	(item.level == 1)?
          <li key={item.id}>
            <label>
              <input type="checkbox" checked={item.open} onClick={item.open = !item.open} /> 
              <span className={item.open ? "open" : ""}>{item.text}</span>
            </label>
          </li>
          :(item.isLeave)?
          <li key={item.id}>
            <label>
              <input type="checkbox" checked={item.open} onClick={item.open = !item.open} /> 
              <span className={item.open ? "open" : "" && leave}>{item.text}</span>
            </label>
          </li>
          :
          <li key={item.id}>
            <label>
              <input type="checkbox" checked={item.open} onClick={item.open = !item.open} /> 
              <span className={item.open ? "open" : ""}>{item.text}</span>
            </label>
          </li>
        ))}
        </ol>
      </div>
    )
  }
}

ReactDOM.render(<TodoApp />, document.querySelector("#app"))