js: Replace deprecated jQuery.fn.hover.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

frontend_tests/node_tests/settings_user_groups.js

@@ -430,17 +430,6 @@ run_test("with_external_user", () => {
         turned_off[event_name + "/" + sel] = true;
     };
 
-    let pill_hover_called = false;
-    let callback;
-    let empty_fn;
-    pill_stub.hover = function (one, two) {
-        callback = one;
-        empty_fn = two;
-        pill_hover_called = true;
-        assert.equal(typeof one, "function");
-        assert.equal(typeof two, "function");
-    };
-
     const exit_button = $.create("fake-pill-exit");
     pill_stub.set_find_results(".exit", exit_button);
     let exit_button_called = false;
@@ -487,14 +476,9 @@ run_test("with_external_user", () => {
     const event = {
         stopPropagation: noop,
     };
-    let pill_click_called = false;
+    const pill_mouseenter_handler = pill_stub.get_on_handler("mouseenter");
     const pill_click_handler = pill_container_stub.get_on_handler("click");
-    pill_click_called = true;
-
-    assert(callback);
-    assert(empty_fn);
-    callback();
-    empty_fn();
+    pill_mouseenter_handler(event);
     pill_click_handler(event);
     assert.equal(delete_handler.call(fake_delete), undefined);
     assert.equal(name_update_handler(), undefined);
@@ -506,8 +490,6 @@ run_test("with_external_user", () => {
     assert.equal(set_attributes_called, 1);
     assert.equal(can_edit_called, 9);
     assert(exit_button_called);
-    assert(pill_click_called);
-    assert(pill_hover_called);
     assert.equal(user_group_find_called, 2);
     assert.equal(pill_container_find_called, 4);
     assert.equal(turned_off["keydown/.pill"], true);

frontend_tests/node_tests/ui_init.js

@@ -190,8 +190,6 @@ $tab_bar.find = () => false;
 compose.compute_show_video_chat_button = () => {};
 $("#below-compose-content .video_link").toggle = () => {};
 
-$("#tab_bar .narrow_description > a").hover = () => {};
-
 run_test("initialize_everything", () => {
     ui_init.initialize_everything();
 });

static/js/settings_user_groups.js

@@ -80,12 +80,9 @@ exports.populate_user_groups = function () {
             pill_container.on("click", (e) => {
                 e.stopPropagation();
             });
-            pill_container.find(".pill").hover(
-                () => {
+            pill_container.find(".pill").on("mouseenter", () => {
                 pill_container.find(".pill").find(".exit").css("opacity", "0.5");
-                },
-                () => {},
-            );
+            });
         }
         update_membership(data.id);
 

static/js/stats/stats.js

@@ -81,8 +81,12 @@ $(() => {
         placement: "top",
         trigger: "manual",
     });
-    $("#id_last_update_question_sign").hover(() => {
-        $("span.last_update_tooltip").tooltip("toggle");
+    $("#id_last_update_question_sign")
+        .on("mouseenter", () => {
+            $("span.last_update_tooltip").tooltip("show");
+        })
+        .on("mouseleave", () => {
+            $("span.last_update_tooltip").tooltip("hide");
         });
     // Add configuration for any additional tooltips here.
 });

static/js/tab_bar.js

@@ -97,14 +97,13 @@ function bind_title_area_handlers() {
 
     // handler that makes sure that hover plays nicely
     // with whether search is being opened or not.
-    $("#tab_bar .narrow_description > a").hover(
-        () => {
+    $("#tab_bar .narrow_description > a")
+        .on("mouseenter", () => {
             $("#tab_bar .search_closed").addClass("search_icon_hover_highlight");
-        },
-        () => {
+        })
+        .on("mouseleave", () => {
             $("#tab_bar .search_closed").removeClass("search_icon_hover_highlight");
-        },
-    );
+        });
 }
 
 function build_tab_bar(filter) {