From c1e28224aa2e1450031669d9a7e359b63e04687d Mon Sep 17 00:00:00 2001
From: Volpeon <git@volpeon.ink>
Date: Wed, 22 Jul 2026 19:40:59 +0200
Subject: Init

---
 src/scripts/lib/siteHeader.ts | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 src/scripts/lib/siteHeader.ts

(limited to 'src/scripts/lib/siteHeader.ts')

diff --git a/src/scripts/lib/siteHeader.ts b/src/scripts/lib/siteHeader.ts
new file mode 100644
index 0000000..0d9ec43
--- /dev/null
+++ b/src/scripts/lib/siteHeader.ts
@@ -0,0 +1,37 @@
+export function mountSiteHeader() {
+	const headerEl = document.querySelector<HTMLElement>(".c-site-header");
+
+	if (headerEl) {
+		const navbarEl = headerEl?.querySelector(".o-navbar--static-white");
+		const logoEl = headerEl?.querySelector(".c-logo--static-white");
+		const buttonEls = headerEl?.querySelectorAll(".o-button--static-white");
+
+		let settings: IntersectionObserverInit;
+
+		const boundingRect = headerEl.getBoundingClientRect();
+
+		if (boundingRect.top > 0) {
+			settings = {
+				rootMargin: "1px 0px -100% 0px",
+			};
+		} else {
+			settings = {
+				root: document.documentElement,
+				rootMargin: "-1px 0px 0px 0px",
+				threshold: [1],
+			};
+		}
+
+		const observer = new IntersectionObserver(([e]) => {
+			const scroll = e?.isIntersecting;
+			headerEl.classList.toggle("is-scroll", scroll);
+			navbarEl?.classList.toggle("o-navbar--static-white", !scroll);
+			logoEl?.classList.toggle("c-logo--static-white", !scroll);
+			for (const buttonEl of buttonEls) {
+				buttonEl.classList.toggle("o-button--static-white", !scroll);
+			}
+		}, settings);
+
+		observer.observe(headerEl);
+	}
+}
-- 
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