focus-on-first
Syntax
focus-on-first: (selector set) [end-of-field] [every (time)] [after (time)][, (element)...];
selector set = Any valid CSS selector referencing multiple elements.
end-of-field = after focus places the cursor at the end of the field, if the field handles text.
The first element in the selector set will be focused on.
This command runs a JavaScript "focus" event.