diff --git a/.gitattributes b/.gitattributes
index 9cb80309760..f1795e4fd1e 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -6,6 +6,5 @@
 /templates/swagger/*.generated.json linguist-generated
 /options/fileicon/** linguist-generated
 /vendor/** -text -eol linguist-vendored
-/web_src/js/vendor/** -text -eol linguist-vendored
 Dockerfile.* linguist-language=Dockerfile
 Makefile.* linguist-language=Makefile
diff --git a/eslint.config.ts b/eslint.config.ts
index 2f545612202..53bcfc46f53 100644
--- a/eslint.config.ts
+++ b/eslint.config.ts
@@ -32,7 +32,6 @@ const restrictedProperties = [
 
 export default defineConfig([
   globalIgnores([
-    'web_src/js/vendor',
     'web_src/fomantic',
     'public/assets/js',
   ]),
diff --git a/tests/e2e/issue-comment.test.ts b/tests/e2e/issue-comment.test.ts
index 414e0567ce2..b78d40b49a4 100644
--- a/tests/e2e/issue-comment.test.ts
+++ b/tests/e2e/issue-comment.test.ts
@@ -24,3 +24,15 @@ test('comment on and close an issue', async ({page, request}) => {
   await page.getByRole('button', {name: 'Close Issue'}).click();
   await expect(page.getByRole('button', {name: 'Reopen Issue'})).toBeVisible();
 });
+
+test('unsaved issue description prompts before leaving', async ({page, request}) => {
+  const repoName = `e2e-are-you-sure-${randomString(8)}`;
+  await Promise.all([apiCreateRepo(request, {name: repoName, autoInit: false}), login(page)]);
+  await page.goto(`/${env.GITEA_TEST_E2E_USER}/${repoName}/issues/new`);
+  await page.getByPlaceholder('Leave a comment').press('a');
+  const dialogPromise = page.waitForEvent('dialog');
+  page.once('dialog', (dialog) => dialog.dismiss());
+  await page.getByRole('link', {name: 'Dashboard'}).click();
+  expect((await dialogPromise).type()).toBe('beforeunload');
+  await expect(page).toHaveURL(/\/issues\/new$/);
+});
diff --git a/web_src/js/components/ViewFileTreeItem.vue b/web_src/js/components/ViewFileTreeItem.vue
index 235925253cb..4fa9de79780 100644
--- a/web_src/js/components/ViewFileTreeItem.vue
+++ b/web_src/js/components/ViewFileTreeItem.vue
@@ -1,7 +1,7 @@
 <script lang="ts" setup>
 import SvgIcon from './SvgIcon.vue';
 import {isPlainClick} from '../utils/dom.ts';
-import {shouldTriggerAreYouSure} from '../vendor/jquery.are-you-sure.ts';
+import {shouldTriggerAreYouSure} from '../modules/are-you-sure.ts';
 import {shallowRef} from 'vue';
 import type {createViewFileTreeStore, FileTreeItem} from './ViewFileTreeStore.ts';
 
diff --git a/web_src/js/features/common-form.ts b/web_src/js/features/common-form.ts
index 793d47c8e29..3790d19c920 100644
--- a/web_src/js/features/common-form.ts
+++ b/web_src/js/features/common-form.ts
@@ -1,17 +1,7 @@
-import {applyAreYouSure, initAreYouSure} from '../vendor/jquery.are-you-sure.ts';
 import {handleGlobalEnterQuickSubmit} from './comp/QuickSubmit.ts';
 import {queryElems} from '../utils/dom.ts';
 import {initComboMarkdownEditor} from './comp/ComboMarkdownEditor.ts';
 
-export function initGlobalFormDirtyLeaveConfirm() {
-  initAreYouSure(window.jQuery);
-  // Warn users that try to leave a page after entering data into a form.
-  // Except on sign-in pages, and for forms marked as 'ignore-dirty'.
-  if (!document.querySelector('.page-content.user.signin')) {
-    applyAreYouSure('form:not(.ignore-dirty)');
-  }
-}
-
 export function initGlobalEnterQuickSubmit() {
   document.addEventListener('keydown', (e) => {
     if (e.isComposing) return;
diff --git a/web_src/js/features/repo-editor.ts b/web_src/js/features/repo-editor.ts
index 092569f0410..a17e98583b1 100644
--- a/web_src/js/features/repo-editor.ts
+++ b/web_src/js/features/repo-editor.ts
@@ -5,7 +5,7 @@ import {hideElem, queryElems, showElem, createElementFromHTML, onInputDebounce}
 import {POST} from '../modules/fetch.ts';
 import {initDropzone} from './dropzone.ts';
 import {confirmModal} from './comp/ConfirmModal.ts';
-import {applyAreYouSure, ignoreAreYouSure} from '../vendor/jquery.are-you-sure.ts';
+import {applyAreYouSure, ignoreAreYouSure} from '../modules/are-you-sure.ts';
 import {submitFormFetchAction} from '../modules/fetch-action.ts';
 import {dirname} from '../utils.ts';
 import {pathEscapeSegments} from '../utils/url.ts';
@@ -181,24 +181,10 @@ export function initRepoEditor() {
   const editArea = document.querySelector<HTMLTextAreaElement>('.page-content.repository.editor textarea#edit_area');
   if (!editArea) return;
 
-  // Using events from https://github.com/codedance/jquery.AreYouSure#advanced-usage
-  // to enable or disable the commit button
   const commitButton = document.querySelector<HTMLButtonElement>('#commit-button')!;
-  const dirtyFileClass = 'dirty-file';
-
-  const syncCommitButtonState = () => {
-    const dirty = elForm.classList.contains(dirtyFileClass);
-    commitButton.disabled = !dirty;
-  };
-  // Registering a custom listener for the file path and the file content
-  // FIXME: it is not quite right here (old bug), it causes double-init, the global areYouSure "dirty" class will also be added
-  applyAreYouSure(elForm, {
-    silent: true,
-    dirtyClass: dirtyFileClass,
-    fieldSelector: ':input:not(.commit-form-wrapper :input)',
-    change: syncCommitButtonState,
-  });
-  syncCommitButtonState(); // disable the "commit" button when no content changes
+  commitButton.disabled = true;
+  elForm.querySelector('.commit-form-wrapper')!.classList.add('ays-ignore'); // commit form fields don't count
+  applyAreYouSure(elForm, (dirty) => commitButton.disabled = !dirty);
 
   initEditPreviewTab(elForm);
 
@@ -207,7 +193,7 @@ export function initRepoEditor() {
     filenameInput.addEventListener('input', onInputDebounce(() => editor.updateFilename(filenameInput.value)));
 
     // Update the editor from query params, if available,
-    // only after the dirtyFileClass initialization
+    // only after the areYouSure initialization
     const params = new URLSearchParams(window.location.search);
     const value = params.get('value');
     if (value) {
diff --git a/web_src/js/features/repo-issue-edit.ts b/web_src/js/features/repo-issue-edit.ts
index 198951d41f4..1621d5919df 100644
--- a/web_src/js/features/repo-issue-edit.ts
+++ b/web_src/js/features/repo-issue-edit.ts
@@ -6,7 +6,7 @@ import {hideElem, querySingleVisibleElem, showElem} from '../utils/dom.ts';
 import {errorMessage} from '../modules/errors.ts';
 import {triggerUploadStateChanged} from './comp/EditorUpload.ts';
 import {convertHtmlToMarkdown} from '../markup/html2markdown.ts';
-import {applyAreYouSure, reinitializeAreYouSure} from '../vendor/jquery.are-you-sure.ts';
+import {applyAreYouSure} from '../modules/are-you-sure.ts';
 
 async function tryOnEditContent(e: Event) {
   const clickTarget = (e.target as HTMLElement).closest('.edit-content');
@@ -52,7 +52,7 @@ async function tryOnEditContent(e: Event) {
         return;
       }
 
-      reinitializeAreYouSure(editContentZone.querySelector('form')); // the form is no longer dirty
+      applyAreYouSure(editContentZone.querySelector('form')!); // the form is no longer dirty
       editContentZone.setAttribute('data-content-version', data.contentVersion);
 
       // replace the render content with new one, to trigger re-initialization of all features
diff --git a/web_src/js/features/repo-issue.ts b/web_src/js/features/repo-issue.ts
index f9a56cc6a27..93d3e99efcd 100644
--- a/web_src/js/features/repo-issue.ts
+++ b/web_src/js/features/repo-issue.ts
@@ -16,7 +16,7 @@ import {showErrorToast} from '../modules/toast.ts';
 import {initRepoIssueSidebar} from './repo-issue-sidebar.ts';
 import {fomanticQuery} from '../modules/fomantic/base.ts';
 import {showFomanticModal} from '../modules/fomantic/modal.ts';
-import {ignoreAreYouSure} from '../vendor/jquery.are-you-sure.ts';
+import {ignoreAreYouSure} from '../modules/are-you-sure.ts';
 import {registerGlobalInitFunc} from '../modules/observer.ts';
 import type {FomanticApiResponse} from '../types.ts';
 
diff --git a/web_src/js/index.ts b/web_src/js/index.ts
index 31ec9a7e96c..cf0d85e3fd0 100644
--- a/web_src/js/index.ts
+++ b/web_src/js/index.ts
@@ -58,7 +58,8 @@ import {initOAuth2SettingsDisableCheckbox} from './features/oauth2-settings.ts';
 import {initGlobalFetchAction} from './modules/fetch-action.ts';
 import {initCommmPageComponents, initGlobalComponent, initGlobalDropdown, initGlobalInput} from './features/common-page.ts';
 import {initGlobalButtonClickOnEnter, initGlobalButtons} from './features/common-button.ts';
-import {initGlobalComboMarkdownEditor, initGlobalEnterQuickSubmit, initGlobalFormDirtyLeaveConfirm} from './features/common-form.ts';
+import {initGlobalComboMarkdownEditor, initGlobalEnterQuickSubmit} from './features/common-form.ts';
+import {initGlobalFormDirtyLeaveConfirm} from './modules/are-you-sure.ts';
 import {callInitFunctions} from './modules/init.ts';
 import {initRepoViewFileTree} from './features/repo-view-file-tree.ts';
 import {initActionsPermissionsForm} from './features/common-actions-permissions.ts';
diff --git a/web_src/js/modules/are-you-sure.test.ts b/web_src/js/modules/are-you-sure.test.ts
new file mode 100644
index 00000000000..5992098ee7b
--- /dev/null
+++ b/web_src/js/modules/are-you-sure.test.ts
@@ -0,0 +1,98 @@
+import {applyAreYouSure, ignoreAreYouSure, initGlobalFormDirtyLeaveConfirm, shouldTriggerAreYouSure} from './are-you-sure.ts';
+
+function createForm(fieldsHtml: string, wrapperClass = ''): HTMLFormElement {
+  document.body.insertAdjacentHTML('beforeend', `<div class="${wrapperClass}"><form>${fieldsHtml}</form></div>`);
+  return document.body.lastElementChild!.querySelector('form')!;
+}
+
+const field = (form: HTMLFormElement, name: string) => form.elements.namedItem(name) as HTMLInputElement;
+
+function set(field: HTMLInputElement, props: Partial<HTMLInputElement>, eventType = 'change') {
+  Object.assign(field, props);
+  field.dispatchEvent(new Event(eventType, {bubbles: true}));
+}
+
+const isBeforeUnloadPrevented = () => !window.dispatchEvent(new Event('beforeunload', {cancelable: true}));
+
+afterEach(() => document.body.replaceChildren());
+
+test('tracks field changes, clears on submit and reset', () => {
+  const form = createForm(`
+    <input name="title" value="a">
+    <input type="checkbox" name="flag">
+    <select name="pick"><option value="a" selected>a</option><option value="b">b</option></select>
+  `);
+  const onDirtyChange = vi.fn();
+  applyAreYouSure(form, onDirtyChange);
+  set(field(form, 'title'), {value: 'b'}, 'input');
+  set(field(form, 'title'), {value: 'c'}, 'input');
+  set(field(form, 'title'), {value: 'a'}, 'keyup');
+  set(field(form, 'flag'), {checked: true});
+  set(field(form, 'flag'), {checked: false});
+  set(field(form, 'pick'), {value: 'b'});
+  expect(onDirtyChange.mock.calls).toEqual([[true], [false], [true], [false], [true]]);
+  expect(shouldTriggerAreYouSure()).toBe(true);
+  form.addEventListener('submit', (e) => e.preventDefault());
+  form.dispatchEvent(new SubmitEvent('submit', {cancelable: true}));
+  expect(shouldTriggerAreYouSure()).toBe(false);
+  set(field(form, 'title'), {value: 'b'});
+  form.reset();
+  expect(shouldTriggerAreYouSure()).toBe(false);
+});
+
+test('ignores untracked fields', () => {
+  const form = createForm(`
+    <input value="a">
+    <input name="dummy" class="ays-ignore" value="a">
+    <div class="ays-ignore"><input name="summary" value="a"></div>
+    <input type="submit" name="send" value="a">
+    <input type="button" name="act" value="a">
+  `);
+  applyAreYouSure(form);
+  form.insertAdjacentHTML('beforeend', '<input name="later" value="a">');
+  for (const input of form.querySelectorAll('input')) set(input, {value: 'b'});
+  expect(shouldTriggerAreYouSure()).toBe(false);
+});
+
+test('applying again resets the baseline', () => {
+  const form = createForm(`
+    <input name="title" value="a">
+    <input name="extra" value="a">
+    <div class="wrapper"><input name="summary" value="a"></div>
+  `);
+  const oldOnDirtyChange = vi.fn();
+  const onDirtyChange = vi.fn();
+  applyAreYouSure(form, oldOnDirtyChange);
+  set(field(form, 'title'), {value: 'b'});
+  form.querySelector('.wrapper')!.classList.add('ays-ignore');
+  applyAreYouSure(form, onDirtyChange);
+  set(field(form, 'summary'), {value: 'b'});
+  set(field(form, 'extra'), {value: 'b'});
+  field(form, 'extra').remove();
+  set(field(form, 'title'), {value: 'b'});
+  set(field(form, 'title'), {value: 'a'});
+  expect(oldOnDirtyChange.mock.calls).toEqual([[true]]);
+  expect(onDirtyChange.mock.calls).toEqual([[true], [false], [true]]);
+});
+
+test('initGlobalFormDirtyLeaveConfirm guards beforeunload', () => {
+  const signin = createForm('<input name="user_name" value="a">', 'page-content user signin');
+  initGlobalFormDirtyLeaveConfirm();
+  set(field(signin, 'user_name'), {value: 'b'});
+  expect(shouldTriggerAreYouSure()).toBe(false);
+  signin.parentElement!.remove();
+  const form = createForm('<input name="title" value="a">');
+  const ignored = createForm('<input name="q" value="a">');
+  ignored.classList.add('ignore-dirty');
+  initGlobalFormDirtyLeaveConfirm();
+  set(field(ignored, 'q'), {value: 'b'});
+  ignored.classList.remove('ignore-dirty');
+  expect(isBeforeUnloadPrevented()).toBe(false);
+  set(field(form, 'title'), {value: 'b'});
+  expect(isBeforeUnloadPrevented()).toBe(true);
+  form.parentElement!.classList.add('tw-hidden');
+  expect(isBeforeUnloadPrevented()).toBe(false);
+  form.parentElement!.classList.remove('tw-hidden');
+  ignoreAreYouSure(form);
+  expect(isBeforeUnloadPrevented()).toBe(false);
+});
diff --git a/web_src/js/modules/are-you-sure.ts b/web_src/js/modules/are-you-sure.ts
new file mode 100644
index 00000000000..eb38e8284e0
--- /dev/null
+++ b/web_src/js/modules/are-you-sure.ts
@@ -0,0 +1,57 @@
+type FormField = HTMLInputElement | HTMLSelectElement | HTMLTextAreaElement;
+type AreYouSureState = {onDirtyChange?: (dirty: boolean) => void, dirty: boolean};
+
+const areYouSureStates = new WeakMap<HTMLFormElement, AreYouSureState>();
+const originalValues = new WeakMap<FormField, string>();
+
+function fieldValue(field: FormField): string {
+  if (field instanceof HTMLSelectElement) {
+    return JSON.stringify(Array.from(field.selectedOptions, (option) => option.value));
+  }
+  if (field instanceof HTMLInputElement && ['checkbox', 'radio'].includes(field.type)) return String(field.checked);
+  return field.value;
+}
+
+function trackedFields(form: HTMLFormElement): FormField[] {
+  return Array.from(form.querySelectorAll<FormField>('input:not([type=submit], [type=button]), select, textarea')).filter((field) => {
+    return field.name && !field.closest('.ays-ignore');
+  });
+}
+
+function setDirty(form: HTMLFormElement, dirty: boolean) {
+  const state = areYouSureStates.get(form)!;
+  if (state.dirty === dirty) return;
+  state.dirty = dirty;
+  state.onDirtyChange?.(dirty);
+}
+
+export function applyAreYouSure(form: HTMLFormElement, onDirtyChange?: (dirty: boolean) => void) {
+  if (!areYouSureStates.has(form)) {
+    const isFieldDirty = (field: FormField) => originalValues.has(field) && originalValues.get(field) !== fieldValue(field);
+    const checkDirty = () => setDirty(form, trackedFields(form).some(isFieldDirty));
+    // keyup: some keydown handlers set values without an input event
+    for (const eventType of ['input', 'change', 'keyup']) form.addEventListener(eventType, checkDirty);
+    for (const eventType of ['submit', 'reset']) form.addEventListener(eventType, () => setDirty(form, false));
+  }
+  areYouSureStates.set(form, {onDirtyChange, dirty: false});
+  for (const field of trackedFields(form)) originalValues.set(field, fieldValue(field));
+}
+
+export function ignoreAreYouSure(el: Element) {
+  el.classList.add('ignore-dirty');
+}
+
+export function shouldTriggerAreYouSure(): boolean {
+  return Array.from(document.querySelectorAll<HTMLFormElement>('form:not(.ignore-dirty)')).some((form) => {
+    return areYouSureStates.get(form)?.dirty && !form.closest('.tw-hidden');
+  });
+}
+
+export function initGlobalFormDirtyLeaveConfirm() {
+  // TODO: refactor the "signin" forms to use "ignore-dirty" class directly, then decouple this module
+  if (document.querySelector('.page-content.user.signin')) return;
+  for (const form of document.querySelectorAll<HTMLFormElement>('form:not(.ignore-dirty)')) applyAreYouSure(form);
+  window.addEventListener('beforeunload', (e) => {
+    if (shouldTriggerAreYouSure()) e.preventDefault();
+  });
+}
diff --git a/web_src/js/modules/codeeditor/main.ts b/web_src/js/modules/codeeditor/main.ts
index 25eef4837cc..a41f8fce618 100644
--- a/web_src/js/modules/codeeditor/main.ts
+++ b/web_src/js/modules/codeeditor/main.ts
@@ -262,7 +262,7 @@ export async function createCodeEditor(textarea: HTMLTextAreaElement, filenameIn
       cm.view.EditorView.updateListener.of((update: ViewUpdate) => {
         if (update.docChanged) {
           textarea.value = update.state.doc.toString();
-          textarea.dispatchEvent(new Event('change')); // needed for jquery-are-you-sure
+          textarea.dispatchEvent(new Event('change', {bubbles: true})); // for the areYouSure dirty tracking
         }
       }),
     ],
diff --git a/web_src/js/modules/fetch-action.ts b/web_src/js/modules/fetch-action.ts
index 14ba9d61e32..87bce528e63 100644
--- a/web_src/js/modules/fetch-action.ts
+++ b/web_src/js/modules/fetch-action.ts
@@ -3,7 +3,7 @@ import {hideToastsAll, showErrorToast} from './toast.ts';
 import {activePageTimerRefresh, addDelegatedEventListener, createElementFromHTML, queryElems} from '../utils/dom.ts';
 import {errorMessage, errorName} from './errors.ts';
 import {confirmModal, createConfirmModal} from '../features/comp/ConfirmModal.ts';
-import {ignoreAreYouSure} from '../vendor/jquery.are-you-sure.ts';
+import {ignoreAreYouSure} from './are-you-sure.ts';
 import {registerGlobalSelectorFunc} from './observer.ts';
 import {Idiomorph} from 'idiomorph';
 import {parseDom} from '../utils.ts';
diff --git a/web_src/js/vendor/jquery.are-you-sure.ts b/web_src/js/vendor/jquery.are-you-sure.ts
deleted file mode 100644
index db89488a725..00000000000
--- a/web_src/js/vendor/jquery.are-you-sure.ts
+++ /dev/null
@@ -1,227 +0,0 @@
-// @ts-nocheck
-// Fork of the upstream module. The only changes are:
-// * use export to make it work with ES6 modules.
-// * the addition of `const` to make it strict mode compatible.
-// * ignore forms with "ignore-dirty" class, ignore hidden forms (closest('.tw-hidden'))
-// * extract the dirty check logic into a separate function
-
-/*!
- * jQuery Plugin: Are-You-Sure (Dirty Form Detection)
- * https://github.com/codedance/jquery.AreYouSure/
- *
- * Copyright (c) 2012-2014, Chris Dance and PaperCut Software http://www.papercut.com/
- * Dual licensed under the MIT or GPL Version 2 licenses.
- * http://jquery.org/license
- *
- * Author:  chris.dance@papercut.com
- * Version: 1.9.0
- * Date:    13th August 2014
- */
-
-const dataKeyAysSettings = 'ays-settings';
-
-export function initAreYouSure($) {
-
-  $.fn.areYouSure = function(options) {
-
-    var settings = $.extend(
-      {
-        'message' : 'You have unsaved changes!',
-        'dirtyClass' : 'dirty',
-        'change' : null,
-        'silent' : false,
-        'addRemoveFieldsMarksDirty' : false,
-        'fieldEvents' : 'change keyup propertychange input',
-        'fieldSelector': ":input:not(input[type=submit]):not(input[type=button])"
-      }, options);
-
-    var getValue = function($field) {
-      if ($field.hasClass('ays-ignore')
-          || $field.hasClass('aysIgnore')
-          || $field.attr('data-ays-ignore')
-          || $field.attr('name') === undefined) {
-        return null;
-      }
-
-      if ($field.is(':disabled')) {
-        return 'ays-disabled';
-      }
-
-      var val;
-      var type = $field.attr('type');
-      if ($field.is('select')) {
-        type = 'select';
-      }
-
-      switch (type) {
-        case 'checkbox':
-        case 'radio':
-          val = $field.is(':checked');
-          break;
-        case 'select':
-          val = '';
-          $field.find('option').each(function(o) {
-            var $option = $(this);
-            if ($option.is(':selected')) {
-              val += $option.val();
-            }
-          });
-          break;
-        default:
-          val = $field.val();
-      }
-
-      return val;
-    };
-
-    var storeOrigValue = function($field) {
-      $field.data('ays-orig', getValue($field));
-    };
-
-    var checkForm = function(evt) {
-
-      var isFieldDirty = function($field) {
-        var origValue = $field.data('ays-orig');
-        if (undefined === origValue) {
-          return false;
-        }
-        return (getValue($field) != origValue);
-      };
-
-      var $form = ($(this).is('form'))
-                    ? $(this)
-                    : $(this).parents('form');
-
-      // Test on the target first as it's the most likely to be dirty
-      if (isFieldDirty($(evt.target))) {
-        setDirtyStatus($form, true);
-        return;
-      }
-
-      const $fields = $form.find(settings.fieldSelector);
-
-      if (settings.addRemoveFieldsMarksDirty) {
-        // Check if field count has changed
-        var origCount = $form.data("ays-orig-field-count");
-        if (origCount != $fields.length) {
-          setDirtyStatus($form, true);
-          return;
-        }
-      }
-
-      // Brute force - check each field
-      var isDirty = false;
-      $fields.each(function() {
-        var $field = $(this);
-        if (isFieldDirty($field)) {
-          isDirty = true;
-          return false; // break
-        }
-      });
-
-      setDirtyStatus($form, isDirty);
-    };
-
-    var initForm = function($form) {
-      var fields = $form.find(settings.fieldSelector);
-      $(fields).each(function() { storeOrigValue($(this)); });
-      $(fields).unbind(settings.fieldEvents, checkForm);
-      $(fields).bind(settings.fieldEvents, checkForm);
-      $form.data("ays-orig-field-count", $(fields).length);
-      $form.data(dataKeyAysSettings, settings);
-      setDirtyStatus($form, false);
-    };
-
-    var setDirtyStatus = function($form, isDirty) {
-      var changed = isDirty != $form.hasClass(settings.dirtyClass);
-      $form.toggleClass(settings.dirtyClass, isDirty);
-
-      // Fire change event if required
-      if (changed) {
-        if (settings.change) settings.change.call($form, $form);
-
-        if (isDirty) $form.trigger('dirty.areYouSure', [$form]);
-        if (!isDirty) $form.trigger('clean.areYouSure', [$form]);
-        $form.trigger('change.areYouSure', [$form]);
-      }
-    };
-
-    var rescan = function() {
-      var $form = $(this);
-      var fields = $form.find(settings.fieldSelector);
-      $(fields).each(function() {
-        var $field = $(this);
-        if (!$field.data('ays-orig')) {
-          storeOrigValue($field);
-          $field.bind(settings.fieldEvents, checkForm);
-        }
-      });
-      // Check for changes while we're here
-      $form.trigger('checkform.areYouSure');
-    };
-
-    var reinitialize = function() {
-      initForm($(this));
-    }
-
-    if (!settings.silent && !window.aysUnloadSet) {
-      window.aysUnloadSet = true;
-      $(window).bind('beforeunload', function() {
-        if (!shouldTriggerAreYouSure(settings)) return;
-
-        // Prevent multiple prompts - seen on Chrome and IE
-        if (navigator.userAgent.toLowerCase().match(/msie|chrome/)) {
-          if (window.aysHasPrompted) {
-            return;
-          }
-          window.aysHasPrompted = true;
-          window.setTimeout(function() {window.aysHasPrompted = false;}, 900);
-        }
-        return settings.message;
-      });
-    }
-
-    return this.each(function(elem) {
-      if (!$(this).is('form')) {
-        return;
-      }
-      var $form = $(this);
-
-      $form.submit(function() {
-        $form.removeClass(settings.dirtyClass);
-      });
-      $form.bind('reset', function() { setDirtyStatus($form, false); });
-      // Add a custom events
-      $form.bind('rescan.areYouSure', rescan);
-      $form.bind('reinitialize.areYouSure', reinitialize);
-      $form.bind('checkform.areYouSure', checkForm);
-      initForm($form);
-    });
-  };
-}
-
-export function applyAreYouSure(selectorOrEl: string|Element|$, opts = {}) {
-  $(selectorOrEl).areYouSure(opts);
-}
-
-export function reinitializeAreYouSure(selectorOrEl: string|Element|$) {
-  $(selectorOrEl).trigger('reinitialize.areYouSure');
-}
-
-export function ignoreAreYouSure(selectorOrEl: string|Element|$) {
-  // here we should only add "ignore-dirty" but not remove "dirty".
-  // because when using "enter" to submit a form, the "dirty" class will appear again before reloading.
-  $(selectorOrEl).addClass('ignore-dirty');
-}
-
-export function shouldTriggerAreYouSure(): boolean {
-  const forms = document.querySelectorAll('form:not(.ignore-dirty)');
-  for (const form of forms) {
-    const settings = $(form).data(dataKeyAysSettings);
-    if (!settings) continue;
-    if (!form.matches('.' + settings.dirtyClass)) continue;
-    if (form.closest('.tw-hidden')) continue;
-    return true;
-  }
-  return false;
-}