bug(mat-menu): Mat menu is always lazily loaded - itens are always destroyed upon closing

[djorge-ph]

Is this a regression?

• No

The previous version in which this bug was not present was

No response

Description

On the documentation, it reads:

However, even when not using the ng-template, the items are always destroyed when the menu is closed.

I would like to have the items eagerly loaded, and on the menu closed, only hiding the items instead of destroying them.

Reproduction

Steps to reproduce:

1. Got to the documentation page: https://material.angular.io/components/menu/overview
2. On the basic menu
   ,
   search for Item 1 on the page elements. You wont find the element.
3. Open the basic menu and search again. This time you will find the menu item:
   
4. Close the menu and search again, the menu item will be gone.

Expected Behavior

I expect to see the mat items eagerly loaded, and only hidden when the mat menu is closed.

Actual Behavior

Mat items are always lazy-loaded. Mat items are destroyed when the menu is closed.

Environment

• Angular: 14.2.4
• CDK/Material: 14.1.2
• Browser(s): Chrome
• Operating System (e.g. Windows, macOS, Ubuntu): Windows