old_contents: const componentHandler = require('o-component-handler');
  
  module.exports = ExampleComponent;
  
  class ExampleComponent {
  
  	constructor(element) {
  		this.element_ = element;
  		this.init();
  	}
  
  	init() {
  		if (this.element_) {
  			this.element_.addEventListener('click', this.handleClick_.bind(this));
  		}
  	}
  
  	handleClick_() {
  		console.log('ExampleComponent: click');
  	}
  }
  
  componentHandler.register({
  	constructor: ExampleComponent,
  	classAsString: 'ExampleComponent',
  	cssClass: 'o-example-component'
  });
  
new_contents: import componentHandler from 'o-component-handler';
  
  export default class ExampleComponent {
  
  	constructor(element) {
  		this.element_ = element;
  		this.init();
  	}
  
  	init() {
  		if (this.element_) {
  			this.element_.addEventListener('click', this.handleClick_.bind(this));
  		}
  	}
  
  	handleClick_() {
  		console.log('ExampleComponent: click');
  	}
  }
  
  componentHandler.register({
  	constructor: ExampleComponent,
  	classAsString: 'ExampleComponent',
  	cssClass: 'o-example-component'
  });
  
subject: use ES2015 module syntax in example