Migrate bs affix

public/typo3conf/ext/ep_theme/Resources/Private/Assets/js/_app.js

@@ -187,13 +187,6 @@ new Vue({
                     this.toggleMobileNavigation();
                 }
             });
-            $('.searchbar')
-                .on('affixed.bs.affix', () => {
-                    this.searchbarFixed = true;
-                })
-                .on('affixed-top.bs.affix', () => {
-                    this.searchbarFixed = false;
-                });
         },
     },
     created () {

public/typo3conf/ext/ep_theme/Resources/Private/Assets/js/controllers/sticky_controller.js

@@ -0,0 +1,15 @@
+import { Controller } from 'stimulus'
+import {useDebounce} from '../mixins/useDebounce'
+
+export default class extends Controller {
+
+    static classes = [ 'sticky' ]
+    static values = { offset: Number }
+
+    connect() {
+        useDebounce(this)
+        window.addEventListener('scroll', this.debounce(() => {
+            this.element.classList.toggle(this.stickyClass, window.scrollY > this.offsetValue)
+        }, 250))
+    }
+}

public/typo3conf/ext/ep_theme/Resources/Private/Templates/Search/Searchbar.html

@@ -14,7 +14,7 @@
                 :initial-filter-options='{filterOptions -> f:format.json() -> f:format.raw()}'
                 :date-presets='{settings.datePickerPresets -> f:format.json() -> f:format.raw()}'
                 inline-template>
-                <div class="container searchbar affix{f:if(condition: fixed, else: '-top')}"{f:if(condition: fixed, else: ' data-spy="affix" data-offset-top="650" data-offset-bottom="200"')}>
+                <div class="container searchbar{f:if(condition: fixed, then: ' affix')}"{f:if(condition: fixed, else: ' data-controller="sticky" data-sticky-sticky-class="affix" data-sticky-offset-value="650"')}>
                     <div class="container">
                         <f:form action="processSearch" controller="Search" method="post" name="searchParams"
                                 object="{searchParams}" pluginName="searchresult" extensionName="epproducts"