js: Use .empty() instead of .html("").

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

frontend_tests/node_tests/activity.js

@@ -302,6 +302,7 @@ test("handlers", ({override, mock_template}) => {
             keys: [me.user_id, alice.user_id, fred.user_id],
         });
         activity.set_cursor_and_filter();
+        $("#user_presences").empty = () => {};
 
         $me_li = $.create("me stub");
         $alice_li = $.create("alice stub");

frontend_tests/node_tests/compose_validate.js

@@ -791,7 +791,7 @@ test_ui("test warn_if_topic_resolved", ({override, mock_template}) => {
     compose_validate.clear_topic_resolved_warning();
     // Hack to make this empty for zjquery; this is conceptually done
     // in the previous line.
-    $error_area.html("");
+    $error_area.empty();
     assert.ok(!$error_area.visible());
 
     compose_state.set_message_type("stream");

frontend_tests/node_tests/list_widget.js

@@ -44,6 +44,7 @@ const ListWidget = zrequire("list_widget");
 
 function make_container() {
     const $container = {};
+    $container.empty = () => {};
 
     // Make our append function just set a field we can
     // check in our tests.
@@ -159,9 +160,6 @@ run_test("scrolling", () => {
         $simplebar_container: $scroll_container,
     };
 
-    $container.html = (html) => {
-        assert.equal(html, "");
-    };
     ListWidget.create($container, items, opts);
 
     assert.deepEqual($container.$appended_data.html(), items.slice(0, 80).join(""));
@@ -213,9 +211,6 @@ run_test("not_scrolling", () => {
         get_min_load_count,
     };
 
-    $container.html = (html) => {
-        assert.equal(html, "");
-    };
     ListWidget.create($container, items, opts);
 
     assert.deepEqual($container.$appended_data.html(), items.slice(0, 80).join(""));
@@ -251,9 +246,6 @@ run_test("filtering", () => {
         $simplebar_container: $scroll_container,
     };
 
-    $container.html = (html) => {
-        assert.equal(html, "");
-    };
     const widget = ListWidget.create($container, list, opts);
 
     let expected_html =
@@ -287,7 +279,6 @@ run_test("filtering", () => {
 run_test("no filtering", () => {
     const $container = make_container();
     const $scroll_container = make_scroll_container();
-    $container.html = () => {};
 
     let callback_called = false;
     // Opts does not require a filter key.
@@ -365,9 +356,6 @@ run_test("wire up filter element", () => {
     const $scroll_container = make_scroll_container();
     const $filter_element = make_filter_element();
 
-    // We don't care about what gets drawn initially.
-    $container.html = () => {};
-
     const opts = {
         filter: {
             filterer: (list, value) => list.filter((item) => item.toLowerCase().includes(value)),
@@ -388,8 +376,7 @@ run_test("sorting", () => {
     const $sort_container = make_sort_container();
 
     let cleared;
-    $container.html = (html) => {
-        assert.equal(html, "");
+    $container.empty = () => {
         cleared = true;
     };
 
@@ -487,7 +474,6 @@ run_test("sorting", () => {
 run_test("custom sort", () => {
     const $container = make_container();
     const $scroll_container = make_scroll_container();
-    $container.html = () => {};
 
     const n42 = {x: 6, y: 7};
     const n43 = {x: 1, y: 43};
@@ -538,7 +524,6 @@ run_test("clear_event_handlers", () => {
 
     // We don't care about actual data for this test.
     const list = [];
-    $container.html = () => {};
 
     const opts = {
         name: "list-we-create-twice",
@@ -613,7 +598,6 @@ run_test("errors", () => {
     });
     blueslip.reset();
 
-    $container.html = () => {};
     blueslip.expect("error", "List item is not a string: 999");
     ListWidget.create($container, list, {
         modifier: () => 999,
@@ -647,7 +631,6 @@ run_test("sort helpers", () => {
 run_test("replace_list_data w/filter update", () => {
     const $container = make_container();
     const $scroll_container = make_scroll_container();
-    $container.html = () => {};
 
     const list = [1, 2, 3, 4];
     let num_updates = 0;
@@ -722,7 +705,6 @@ run_test("render item", () => {
     const $container = make_container();
     const $scroll_container = make_scroll_container();
     const INITIAL_RENDER_COUNT = 80; // Keep this in sync with the actual code.
-    $container.html = () => {};
     let called = false;
     $scroll_container.find = (query) => {
         const expected_queries = [
@@ -840,7 +822,6 @@ run_test("Multiselect dropdown retain_selected_items", () => {
     const list = ["one", "two", "three", "four"].map((x) => ({name: x, value: x}));
     const data = ["one"]; // Data initially selected.
 
-    $container.html = () => {};
     $container.find = (elem) => DropdownItem(elem);
 
     // We essentially create fake jQuery functions

frontend_tests/node_tests/rendered_markdown.js

@@ -359,7 +359,7 @@ run_test("spoiler-header-empty-fill", () => {
     // Test that an empty header gets the default text applied (through i18n filter).
     const toggle_button_html =
         '<span class="spoiler-button" aria-expanded="false"><span class="spoiler-arrow"></span></span>';
-    $header.html("");
+    $header.empty();
     rm.update_elements($content);
     assert.equal(toggle_button_html + "<p>translated HTML: Spoiler</p>", $header.html());
 });

frontend_tests/zjsunit/zjquery_element.js

@@ -59,6 +59,7 @@ function FakeElement(selector, opts) {
         empty(arg) {
             if (arg === undefined) {
                 find_results.clear();
+                html = "";
             }
             return $self;
         },

static/js/buddy_list.js

@@ -59,7 +59,7 @@ export class BuddyList extends BuddyListConf {
 
     populate(opts) {
         this.render_count = 0;
-        this.$container.html("");
+        this.$container.empty();
 
         // We rely on our caller to give us items
         // in already-sorted order.

static/js/emoji_picker.js

@@ -337,7 +337,7 @@ function round_off_to_previous_multiple(number_to_round, multiple) {
 }
 
 function reset_emoji_showcase() {
-    $(".emoji-showcase-container").html("");
+    $(".emoji-showcase-container").empty();
 }
 
 function update_emoji_showcase($focused_emoji) {

static/js/lightbox.js

@@ -177,7 +177,7 @@ export function clear_for_testing() {
 export function render_lightbox_list_images(preview_source) {
     if (!is_open) {
         const images = Array.prototype.slice.call($(".focused_table .message_inline_image img"));
-        const $image_list = $("#lightbox_overlay .image-list").html("");
+        const $image_list = $("#lightbox_overlay .image-list").empty();
 
         for (const img of images) {
             const src = img.getAttribute("src");

static/js/list_widget.js

@@ -278,7 +278,7 @@ export function create($container, list, opts) {
     };
 
     widget.clear = function () {
-        $container.html("");
+        $container.empty();
         meta.offset = 0;
     };
 

static/js/popovers.js

@@ -973,7 +973,7 @@ export function register_click_handlers() {
             emoji_name: "",
             emoji_code: "",
             success() {
-                $(".info_popover_actions #status_message").html("");
+                $(".info_popover_actions #status_message").empty();
             },
         });
     });

static/js/settings_account.js

@@ -286,7 +286,7 @@ export function add_custom_profile_fields_to_settings() {
     }
 
     const element_id = "#profile-settings .custom-profile-fields-form";
-    $(element_id).html("");
+    $(element_id).empty();
 
     append_custom_profile_fields(element_id, people.my_current_user_id());
     initialize_custom_user_type_fields(element_id, people.my_current_user_id(), true, true);

static/js/settings_profile_fields.js

@@ -153,7 +153,7 @@ function clear_form_data() {
     // Set default type "Short text" in field type dropdown
     $("#profile_field_type").val(field_types.SHORT_TEXT.id);
     // Clear data from select field form
-    $("#profile_field_choices").html("");
+    $("#profile_field_choices").empty();
     create_choice_row($("#profile_field_choices"));
     update_choice_delete_btn($("#profile_field_choices"), false);
     $("#profile_field_choices_row").hide();
@@ -314,7 +314,7 @@ function set_up_select_field_edit_form($profile_field_form, field_data) {
     // Re-render field choices in edit form to load initial select data
     const $choice_list = $profile_field_form.find(".edit_profile_field_choices_container");
     $choice_list.off();
-    $choice_list.html("");
+    $choice_list.empty();
 
     const choices_data = parse_field_choices_from_field_data(field_data);
 

static/js/settings_user_groups.js

@@ -31,7 +31,7 @@ export function reload() {
     }
 
     const $user_groups_section = $("#user-groups").expectOne();
-    $user_groups_section.html("");
+    $user_groups_section.empty();
     populate_user_groups();
 }
 

static/js/settings_users.js

@@ -588,7 +588,7 @@ export function show_edit_user_info_modal(user_id, from_user_info_popover) {
         }
 
         const element = "#edit-user-form .custom-profile-field-form";
-        $(element).html("");
+        $(element).empty();
         settings_account.append_custom_profile_fields(element, user_id);
         settings_account.initialize_custom_date_type_fields(element);
         fields_user_pills = settings_account.initialize_custom_user_type_fields(

static/js/ui_init.js

@@ -117,7 +117,7 @@ function message_unhover() {
     if ($current_message_hover === undefined) {
         return;
     }
-    $current_message_hover.find("span.edit_content").html("");
+    $current_message_hover.find("span.edit_content").empty();
     $current_message_hover = undefined;
 }