React

by Avinashullal

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

var Counter = React.createClass({
  getInitialState: function() {
    return {counter: 0};
  },
  increaseCounter: function() {
    this.setState({
      counter: this.state.counter + 1
    });
  },
  render: function() {
    return (
      <div>
        <div> {this.state.counter} </div>
        <button onClick={this.increaseCounter}> Add </button>
      </div>
    );
  }
});