React

by luka kupunia

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;
}

React

class TodoApp extends React.Component {
  state = {
   id : 1,
   value : 0
  }; 
     
  render() {
    return (
    <div>
			<h1 className = {this.state.id} onClick={ this.addElement }>Add Element</h1>
    </div>	
    )
  }
  	
  addElement = (e) => {
  	const b = e.target.textContent;
    console.log(b);
    return <li>{b}</li>;
  }
  
}

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