add and configure gulp

assets/js/script.js

@@ -0,0 +1,31 @@
+function openTab(data, tab) {
+  data.activeTab === tab ? (data.activeTab = "") : (data.activeTab = tab);
+}
+
+function scrollToElem(selector) {
+  setTimeout(() => {
+    const yOffset = -185;
+    const elem = document.querySelector(selector);
+    const top = elem.getBoundingClientRect().top;
+    window.scrollTo({
+      top: top + window.scrollY + yOffset,
+      behavior: "smooth",
+    });
+  }, 100);
+}
+
+document.addEventListener("DOMContentLoaded", () => {
+  function toggleLogoState() {
+    const scrollY = window.scrollY || window.pageYOffset;
+
+    if (scrollY > 10) {
+      document.querySelector("#header").classList.add("minimized");
+    } else {
+      document.querySelector("#header").classList.remove("minimized");
+    }
+  }
+
+  window.addEventListener("scroll", () => {
+    toggleLogoState();
+  });
+});