<body> <script type="application/javascript"> 'use strict'; // -sp-context: content (function () { let proto = Object.create(HTMLDivElement.prototype); proto.template = `<style></style>`; proto.createdCallback = function() { let shadow = this.createShadowRoot(); if (this.template) { let te = document.createElement('template'); te.innerHTML = this.template; shadow.appendChild(document.importNode(te.content, true)); } }; let UiComponentTest = document.registerElement('ui-component-test', { prototype: proto, }); let uic = new UiComponentTest(); document.body.appendChild(uic); })(); </script> </body>