Create metric selector via JS

scripts/graph/util.ts

@@ -0,0 +1,11 @@
+/**
+ * Create an {@link HTMLElement}.
+ */
+export function el(name: string, attributes: { [key: string]: string; }, ...children: (string | Node)[]) {
+    let element = document.createElement(name);
+    for (let [name, value] of Object.entries(attributes)) {
+        element.setAttribute(name, value);
+    }
+    element.append(...children);
+    return element;
+}