feat(VCST-4103): navigation in filters-popup-sidebar (#2024)

## Description

## References
### Jira-link:
https://virtocommerce.atlassian.net/browse/VCST-4103
### Artifact URL:

https://vc3prerelease.blob.core.windows.net/packages/vc-theme-b2b-vue-2.34.0-pr-2024-f1e7-f1e7cc1b.zip

---------

Co-authored-by: Elena Mutykova <[email protected]>

Author: muller39

client-app/pages/product.vue

@@ -235,7 +235,7 @@ const {
   isFiltersSidebarVisible,
   productsFilters,
   applyFilters: _applyFilters,
-  hideFiltersSidebar,
+  hideFiltersSidebar: _hideFiltersSidebar,
   resetFacetFilters: _resetFacetFilters,
   showFiltersSidebar,
 } = useProducts({
@@ -403,6 +403,14 @@ async function resetFacetFilters(): Promise<void> {
   void applyFilters(productsFilters.value);
 }
 
+function hideFiltersSidebar(): void {
+  _hideFiltersSidebar();
+  const variationsFiltersButton = document.getElementById(`${productId.value}-variations-filters-button`);
+  if (variationsFiltersButton) {
+    variationsFiltersButton.focus();
+  }
+}
+
 function checkLineItemId() {
   const cartItems = cart.value?.items;
   return cartItems?.some((item) => item.id === lineItemId);

client-app/shared/catalog/components/category/filters-popup-sidebar.vue

@@ -7,6 +7,7 @@
   >
     <ProductsFilters
       v-if="localFilters"
+      :id="productsFiltersId"
       :keyword="keywordQueryParam"
       :filters="localFilters"
       :loading="loading || facetsLoading"
@@ -96,9 +97,10 @@
 <script setup lang="ts">
 import cloneDeep from "lodash/cloneDeep";
 import isEqual from "lodash/isEqual";
-import { watch, ref, computed } from "vue";
+import { watch, ref, computed, nextTick, onMounted, onUnmounted } from "vue";
 import { usePurchasedBefore } from "@/shared/catalog/composables";
 import { useModal } from "@/shared/modal";
+import { useComponentId } from "@/ui-kit/composables";
 import type { SearchProductFilterResult } from "@/core/api/graphql/types.ts";
 import type { ProductsFiltersType } from "@/shared/catalog";
 import ProductsFilters from "@/shared/catalog/components/products-filters.vue";
@@ -124,6 +126,8 @@ interface IProps {
   isExistSelectedFacets: boolean;
 }
 
+const productsFiltersId = useComponentId("products-filters");
+
 const localFilters = ref<ProductsFiltersType>({
   filters: [],
   facets: [],
@@ -159,9 +163,11 @@ watch(
 
 watch(
   () => props.isVisible,
-  (visible) => {
+  async (visible) => {
     if (visible) {
       beforeChangeFilterState.value = cloneDeep(props.popupSidebarFilters);
+      await nextTick();
+      focusFirstElement();
     }
   },
 );
@@ -196,6 +202,22 @@ function onApply() {
   emit("hidePopupSidebar");
 }
 
+function focusFirstElement() {
+  const firstFocusableElement = document
+    .getElementById(productsFiltersId)
+    ?.querySelector("input:not(:disabled), button:not(:disabled)");
+  if (firstFocusableElement && firstFocusableElement instanceof HTMLElement) {
+    firstFocusableElement.focus();
+  }
+}
+
+function handleKeydown(event: KeyboardEvent) {
+  if (event.key === "Escape" && props.isVisible) {
+    event.preventDefault();
+    emit("hidePopupSidebar");
+  }
+}
+
 const { openModal } = useModal();
 function openBranchesModal() {
   openModal({
@@ -213,6 +235,14 @@ function openBranchesModal() {
     },
   });
 }
+
+onMounted(() => {
+  document.addEventListener("keydown", handleKeydown);
+});
+
+onUnmounted(() => {
+  document.removeEventListener("keydown", handleKeydown);
+});
 </script>
 
 <style lang="scss">

client-app/shared/catalog/components/product/variations.vue

@@ -40,7 +40,7 @@
         />
       </div>
 
-      <VcButton variant="outline" @click="$emit('showFilters')">
+      <VcButton :id="`${productId}-variations-filters-button`" variant="outline" @click="$emit('showFilters')">
         {{ $t("common.buttons.filters") }}
       </VcButton>
     </div>