React

by ken3desu

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;
}

li {
  margin: 8px 0;
}

h2 {
  font-weight: bold;
  margin-bottom: 15px;
}

.done {
  color: rgba(0, 0, 0, 0.3);
  text-decoration: line-through;
}

input {
  margin-right: 5px;
}

.row {
  display: flex
}

React

class Helper {
  static makeHogeFunc(component) {
    return () => {
      component.setState({
        items: [
          {text: 'Hoge', done: false},
          {text: 'Fuga', done: false},
        ],
      });
    };
  }
}

const todoRender = (component, title) => {
  return (
    <div>
      <h2>{title}</h2>
      <button onClick={component.changeItems}>change to Hoge</button>
      <ol>
        {component.state.items.map(item => (
          <li key={item.id}>
            <label>
              <input type="checkbox" disabled readOnly checked={item.done}/>
              <span className={item.done ? 'done' : ''}>{item.text}</span>
            </label>
          </li>
        ))}
      </ol>
    </div>
  );
};

class TodoApp2 extends React.Component {
  constructor(props) {
    super(props);
    this.changeItems = Helper.makeHogeFunc(this);
    this.state = {
      items: [
        {text: 'Learn PHP', done: false},
        {text: 'Learn Python', done: false},
      ],
    };
  }

  render() {
    return todoRender(this, 'Todos 2:');
  }
}

class TodoApp extends React.Component {
  constructor(props) {
    super(props);
    this.changeItems = Helper.makeHogeFunc(this);
    this.state = {
      items: [
        {text: 'Learn JavaScript', done: false},
        {text: 'Learn React', done: false},
        {text: 'Play around in JSFiddle', done: true},
        {text: 'Build something awesome', done: true},
      ],
    };
  }

  render() {
    return todoRender(this, 'Todos :');
  }
}

ReactDOM.render(
  <div class="row"><TodoApp/><TodoApp2/></div>,
  document.querySelector('#app'),
);