third_party/WebKit/LayoutTests/custom-elements/imports/resources/circular-level1.html - chromium/src - Git at Google

 <!DOCTYPE html>
 <link rel="import" href="circular-level2.html">
 <script>
 'use strict';

 customElements.define('a-a', class extends HTMLElement {
   constructor() {
     super();
     constructors.push('circular-level1');
   }
 });
 </script>
	<!DOCTYPE html>
	<link rel="import" href="circular-level2.html">
	<script>
	'use strict';

	customElements.define('a-a', class extends HTMLElement {
	constructor() {
	super();
	constructors.push('circular-level1');
	}
	});
	</script>