Issue 6487 - IOElement as base component for ABP UI

tests/io-element.test.js

+/* globals module, require */
+
+"use strict";
+
+const IOElement = require("../js/io-element");
+
+class IOClock extends IOElement
+{
+  connectedCallback()
+  {
+    this._timer = setInterval(() => this.render(), 1000);
+  }
+
+  disconnectedCallback()
+  {
+    clearInterval(this._timer);
+  }
+
+  render()
+  {
+    this.html`
+      ${{i18n: "io_clock"}}
+      @${(new Date()).toLocaleTimeString()}
+    `;
+  }
+}
+
+IOClock.define("io-clock");