v0.2.90

static/js/dom-reconcile.js

@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2026 Mateusz Gruszczynski @linuxiarz.pl
+ * Source-Available Code / Dual-Licensed.
+ * See LICENSE.md for terms.
+ */
+
+// Preserve existing nodes. Remove stale entries first: otherwise deleting a
+// user near the start of a 1000-person list would move every following node.
+// `desired` must contain each node at most once.
+export function reconcileChildren(container, desired) {
+  const retained = new Set(desired);
+  for (const node of [...container.childNodes]) {
+    if (!retained.has(node)) node.remove();
+  }
+  let cursor = container.firstChild;
+  for (const node of desired) {
+    if (node === cursor) cursor = cursor.nextSibling;
+    else container.insertBefore(node, cursor);
+  }
+}