Site alerts on desktop are opened automatically the first time the use encounters them. A cookie is set with the ID of the alert which will prevent them from auto-opening on future visits.
If the author wants to create an alert with snippet of text with a link that takes the user to a new page (second examples), the "Show More" button should be hidden on desktop. Adding a
hide-show-more class to
c-site-alert component will make this happen.