Remove some jquery

core/templates/core/base.jinja

@@ -125,15 +125,14 @@
           navbar.style.setProperty("display", current === "none" ? "block" : "none");
         }
 
-        $(document).keydown(function (e) {
-          if ($(e.target).is('input')) { return }
-          if ($(e.target).is('textarea')) { return }
-          if ($(e.target).is('select')) { return }
-          if (e.keyCode === 83) {
-            $("#search").focus();
-            return false;
+        document.addEventListener("keydown", (e) => {
+          // Looking at the `s` key when not typing in a form
+          if (e.keyCode !== 83 || ["INPUT", "TEXTAREA", "SELECT"].includes(e.target.nodeName)) {
+            return;
           }
-        });
+          document.getElementById("search").focus();
+          e.preventDefault(); // Don't type the character in the focused search input
+        })
       </script>
     {% endblock %}
   </body>

core/templates/core/file.jinja

@@ -57,13 +57,4 @@
     {% endblock %}
   {% endif %}
 
-  {% block script %}
-    {{ super() }}
-    {% if popup %}
-      <script>
-        parent.$(".choose_file_widget").css("height", "75%");
-      </script>
-    {% endif %}
-  {% endblock %}
-
 {% endblock %}

core/templates/core/user_detail.jinja

@@ -244,27 +244,30 @@
 {% block script %}
   {{ super() }}
   <script>
-    $(function () {
-      var keys = [];
-      var pattern = "71,85,89,71,85,89";
-      $(document).keydown(function (e) {
-        keys.push(e.keyCode);
-        if (keys.toString() == pattern) {
-          keys = [];
-          $("#big_picture img").attr("src", "{{ static('core/img/yug.jpg') }}");
+    // Image selection
+    for (const img of document.querySelectorAll("#small_pictures img")){
+      img.addEventListener("click", (e) => {
+        const displayed = document.querySelector("#big_picture img");
+        displayed.src = e.target.src;
+        displayed.alt = e.target.alt;
+        displayed.title = e.target.title;
+      })
     }
-        if (keys.length == 6) {
+
+    let keys = [];
+    const pattern = "71,85,89,71,85,89";
+
+    document.addEventListener("keydown", (e) => {
+      keys.push(e.keyCode);
+      if (keys.toString() === pattern) {
+        keys = [];
+        document.querySelector("#big_picture img").src = "{{ static('core/img/yug.jpg') }}";
+      }
+      if (keys.length === 6) {
         keys.shift();
       }
     });
-    });
-    $(function () {
-      $("#small_pictures img").click(function () {
-        $("#big_picture img").attr("src", $(this)[0].src);
-        $("#big_picture img").attr("alt", $(this)[0].alt);
-        $("#big_picture img").attr("title", $(this)[0].title);
-      })
-    });
+
     $(function () {
       $("#drop_gifts").accordion({
         heightStyle: "content",