Sample code showing how composable components look similar to OOP JS

React composable components

var BaseButton = React.createClass({
  propTypes: {
    buttonText: React.PropTypes.string.isRequired,
    buttonColor: React.PropTypes.string,
    buttonHoverColor: React.PropTypes.string,
    useSpinner: React.PropTypes.bool,
    buttonHoverTextColor: React.PropTypes.string,
    buttonLink: React.PropTypes.string
  },
  
  linkToLocation: function(evt) {
    document.location.href = this.props.buttonLink;
    evt.preventDefault();
  },
  
  spinnerIfSpecified: function() {
    if (this.props.useSpinner === true) {
      return <img src="/images/transparent-spinner.gif" alt="" />;
    }
  },
  
  ...
  
});