fix(docs-infra): don't call setSearch when not clicking in the searchBox and no searchResults (#26590)

Fix to call locationService.setSearch less often to avoid unnecessary
downloading of favicons

Fixes #26544

PR Close #26590

aio/src/app/app.component.spec.ts

@@ -742,7 +742,7 @@ describe('AppComponent', () => {
           expect(component.showSearchResults).toBe(true);
         });
 
-        it('should not intercept clicks om the searchBox', () => {
+        it('should not intercept clicks on the searchBox', () => {
           component.showSearchResults = true;
           fixture.detectChanges();
 
@@ -752,6 +752,11 @@ describe('AppComponent', () => {
 
           expect(component.showSearchResults).toBe(true);
         });
+
+        it('should not call `locationService.setSearch` when searchResults are not shown', () => {
+          docViewer.click();
+          expect(locationService.setSearch).not.toHaveBeenCalled();
+        });
       });
 
       describe('keyup handling', () => {

aio/src/app/app.component.ts

@@ -389,7 +389,10 @@ export class AppComponent implements OnInit {
 
   hideSearchResults() {
     this.showSearchResults = false;
-    this.locationService.setSearch('', { ...this.locationService.search(), search: undefined });
+    const oldSearch = this.locationService.search();
+    if (oldSearch.search !== undefined) {
+      this.locationService.setSearch('', { ...oldSearch, search: undefined });
+    }
   }
 
   focusSearchBox() {