|Open switcher||Choose visual||Surface goes blank||VE finishes loading|
We didn't really design for this case, but I would guess showing the * Editor loading spinner would suffice.
Ideally we'd grey out the wikitext surface instead of hiding it too, and change the copy to "Switching editor":
This is caused by rEMFRbd1b16ff18bc: Get rid of toHtmlString and simplify overlay header construction. Previously, a generic spinner would be shown when switching editors.
|Switching…||…from source to visual||…from visual to source|
(The same change has also apparently broke the ellipsing of page title in wikitext editor.)