lazy element, settings: account delete and secret update

templates/utils/lazyElement.ts

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2021  Aravinth Manivannan <realaravinth@batsense.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+class LazyElement {
+  id: string;
+  element: HTMLElement;
+  constructor(id: string) {
+    this.id = id;
+  }
+
+  get() {
+    if (this.element === null || this.element === undefined) {
+      const element = document.getElementById(this.id);
+      if (element === null || element === undefined) {
+        throw new Error(`Element ${this.id} is undefined`);
+      } else {
+        this.element = element;
+      }
+    }
+    return this.element;
+  }
+}
+
+export default LazyElement;