support: Avoid $(callback) to reduce zjquery complexity.

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

web/src/support/support.ts

@@ -2,7 +2,7 @@ import ClipboardJS from "clipboard";
 import $ from "jquery";
 import assert from "minimalistic-assert";
 
-$(() => {
+function initialize(): void {
     $("body").on("click", "button.scrub-realm-button", function (this: HTMLButtonElement, e) {
         e.preventDefault();
         const message =
@@ -100,4 +100,6 @@ $(() => {
             }
         },
     );
-});
+}
+
+initialize();

web/tests/lib/index.cjs

@@ -87,7 +87,6 @@ const noop = function () {};
 require("../../src/templates.ts"); // register Zulip extensions
 
 async function run_one_module(file) {
-    zjquery.clear_initialize_function();
     zjquery.clear_all_elements();
     console.info("running test " + path.basename(file, ".test.cjs"));
     test.set_current_file_name(file);

web/tests/lib/zjquery.cjs

@@ -82,24 +82,8 @@ function make_zjquery() {
         return proxy;
     }
 
-    let initialize_function;
-
     const zjquery = function (arg, arg2) {
-        if (typeof arg === "function") {
-            assert.ok(
-                !initialize_function,
-                `
-                    We are trying to avoid the $(...) mechanism
-                    for initializing modules in our codebase,
-                    and the code that you are compiling/running
-                    has tried to do this twice.  Please either
-                    clean up the real code or reduce the scope
-                    of what you are testing in this test module.
-                `,
-            );
-            initialize_function = arg;
-            return undefined;
-        }
+        assert.ok(typeof arg !== "function", "zjquery does not support $(callback)");
 
         // If somebody is passing us an element, we return
         // the element itself if it's been created with
@@ -141,14 +125,6 @@ function make_zjquery() {
         return elems.get(selector);
     };
 
-    zjquery.get_initialize_function = function () {
-        return initialize_function;
-    };
-
-    zjquery.clear_initialize_function = function () {
-        initialize_function = undefined;
-    };
-
     zjquery.create = function (name, opts) {
         assert.ok(!elems.has(name), "You already created an object with this name!!");
         const $elem = new_elem(name, opts);

web/tests/support.test.cjs

@@ -21,10 +21,9 @@ mock_cjs("clipboard", class Clipboard {});
 
 zrequire("../src/support/support");
 
-run_test("scrub_realm", () => {
-    $.get_initialize_function()();
-    const click_handler = $("body").get_on_handler("click", "button.scrub-realm-button");
+const click_handler = $("body").get_on_handler("click", "button.scrub-realm-button");
 
+run_test("scrub_realm", () => {
     const $fake_this = $.create("fake-.scrub-realm-button");
     $fake_this.attr = (name) => {
         assert.equal(name, "data-string-id");