schala/static/main.jsx

const React = require("react");
const ReactDOM = require("react-dom");


class CodeArea extends React.Component {
  constructor(props) {
    super(props);
    this.state = {value: ""};
    this.handleChange = this.handleChange.bind(this);
    this.submit = this.submit.bind(this);
  }

  handleChange(event) {
    this.setState({value: event.target.value});
  }

  submit(event) {
    console.log("This", this.state.value);
  }

  render() {
    return (<div>
      <textarea value={ this.state.value } onChange={this.handleChange}>
      </textarea>
      <button onClick={ this.submit }>Run!</button>
    </div>);
  }
}

const main = (<div>
  <h1>Schala web input</h1>
  <p>Write your source code here</p>
  <CodeArea/>
</div>);

const rootDom = document.getElementById("main");
ReactDOM.render(main, rootDom);