nanka iroiro

1 files changed, 23 insertions, 0 deletions

diff --git a/src/client/scripts/focus.ts b/src/client/scripts/focus.ts
new file mode 100644
index 0000000000..a2a8516d36
--- /dev/null
+++ b/src/client/scripts/focus.ts
@@ -0,0 +1,23 @@
+export function focusPrev(el: Element | null, self = false) {
+	if (el == null) return;
+	if (!self) el = el.previousElementSibling;
+	if (el) {
+		if (el.hasAttribute('tabindex')) {
+			(el as HTMLElement).focus();
+		} else {
+			focusPrev(el.previousElementSibling, true);
+		}
+	}
+}
+
+export function focusNext(el: Element | null, self = false) {
+	if (el == null) return;
+	if (!self) el = el.nextElementSibling;
+	if (el) {
+		if (el.hasAttribute('tabindex')) {
+			(el as HTMLElement).focus();
+		} else {
+			focusPrev(el.nextElementSibling, true);
+		}
+	}
+}