React

by bowheart

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/react-is/16.13.1/umd/react-is.development.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/styled-components/5.1.0/styled-components.js"></script>
<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;
}

React

class TodoApp extends React.Component {
  constructor(props) {
    super(props)
    this.state = {
    	something: "something"
    }
  }
  
  render() {
    return (
    	<Div>
    	  Hello there
    	</Div>
		)
  }
}

const Div = styled.div`
  background: black;
	color: #fff;
  width: 100px;
	height: 100px;
`

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