1 files changed, 47 insertions, 0 deletions
diff --git a/src/js/includeheader.js b/src/js/includeheader.js
new file mode 100644
index 00000000..5ac7d067
--- /dev/null
+++ b/src/js/includeheader.js
@@ -0,0 +1,47 @@
+function includeHeader() {
+  var z, i, elmnt, file, xhttp;
+  // loop through a collection of all HTML elements
+  z = document.getElementsByTagName("*");
+  for (i = 0; i < z.length; i++) {
+    elmnt = z[i];
+    // search for elements with a certain attribute
+    file = elmnt.getAttribute("include-header");
+    if (file) {
+      // make an HTTP request using the attribute value as the file name
+      xhttp = new XMLHttpRequest();
+      xhttp.onreadystatechange = function() {
+        if (this.readyState == 4) {
+          if (this.status == 200) {
+            elmnt.innerHTML = this.responseText;
+            setActiveLink(); // Set the active link after including the HTML
+          }
+          if (this.status == 404) {
+            elmnt.innerHTML = "Page not found.";
+          }
+          // remove the attribute and call this function once more
+          elmnt.removeAttribute("include-header");
+          includeHeader();
+        }
+      };
+      xhttp.open("GET", file, true);
+      xhttp.send();
+      // exit the function
+      return;
+    }
+  }
+}
+
+// Set the active link based on the current page
+function setActiveLink() {
+  var currentPath = window.location.pathname;
+  var navLinks = document.getElementsByClassName("navBar")[0].getElementsByTagName("a");
+  for (var i = 0; i < navLinks.length; i++) {
+    var link = navLinks[i];
+    var href = link.getAttribute("href");
+    if (href === currentPath) {
+      link.classList.add("active");
+    } else {
+      link.classList.remove("active");
+    }
+  }
+}