Resets modal filters when closing

app/assets/javascripts/boards/components/modal/filters.js.es6

@@ -18,6 +18,9 @@
         required: true,
       },
     },
+    destroyed() {
+      ModalStore.setDefaultFilter();
+    },
     components: {
       'user-filter': gl.issueBoards.ModalFilterUser,
       'milestone-filter': gl.issueBoards.ModalFilterMilestone,

app/assets/javascripts/boards/components/modal/index.js.es6

@@ -74,6 +74,8 @@
         this.loadIssues(true);
       }, 500),
       loadIssues(clearIssues = false) {
+        if (!this.showAddIssuesModal) return;
+        
         const data = Object.assign({}, this.filter, {
           search: this.searchTerm,
           page: this.page,

app/assets/javascripts/boards/stores/modal_store.js.es6

@@ -17,12 +17,17 @@
         loadingNewPage: false,
         page: 1,
         perPage: 50,
-        filter: {
-          author_id: '',
-          assignee_id: '',
-          milestone_title: '',
-          label_name: [],
-        },
+      };
+
+      this.setDefaultFilter();
+    }
+
+    setDefaultFilter() {
+      this.store.filter = {
+        author_id: '',
+        assignee_id: '',
+        milestone_title: '',
+        label_name: [],
       };
     }

spec/features/boards/modal_filter_spec.rb

@@ -16,6 +16,32 @@ describe 'Issue Boards add issue modal filtering', :feature, :js do
     login_as(user)
   end
+  it 'restores filters when closing' do
+    visit_board
+
+    page.within('.add-issues-modal') do
+      click_button 'Milestone'
+
+      wait_for_ajax
+
+      click_link 'Upcoming'
+
+      wait_for_vue_resource
+
+      expect(page).to have_selector('.card', count: 0)
+
+      click_button 'Cancel'
+    end
+
+    click_button('Add issues')
+
+    page.within('.add-issues-modal') do
+      wait_for_vue_resource
+
+      expect(page).to have_selector('.card', count: 1)
+    end
+  end
+
   context 'author' do
     let!(:issue) { create(:issue, project: project, author: user2) }