Appendix

components/d-references.js

@@ -0,0 +1,19 @@
+import {Template} from "../mixins/template";
+import {body} from "./layout";
+
+const T = Template("d-references", `
+<style>
+d-references {
+  display: block;
+}
+</style>
+`, false);
+
+export default class References extends T(HTMLElement) {
+  static get is() { return "d-references"; }
+  connectedCallback() {
+    super.connectedCallback();
+  }
+}
+
+customElements.define(References.is, References);