Variation: list with inline auto complete

Considerations (1 of 3):

  1. when the dropdown is displayed, the suggested values that that would complete the typed characters will appear
  2. the first suggestion will appear inline and complete the suggested selection that the user hasn't typed yet
  3. the first suggestion is automatically highlighted as selected
  4. the automatically selected suggestion becomes the value of the textbox when the combobox loses focus (unless the user chooses a different suggestion)

Keyboard Navigation (2 of 3):

DOWN ARROW
if the listbox is not displayed, the listbox is opened and moves focus to the first value; subsequent keypresses will move the focus to the next item in the list.
UP ARROW
if the listbox is not displayed, the listbox is opened and focused is moved to the last value; subsequent keypresses will move the focus to the previous item in the list.
ENTER
If there is an option selected, the textbox value is set and the listbox is closed.
ESCAPE
Clears the textbox and closes the listbox if it's displayed.

Notes (3 of 3):

  1. I'm still seeing some strangeness from the use of the native and listbox, so I'll have to see if I can consistently control that. I haven't quite pinned down the precise conditions under which the observed behavior can be replicated.
  2. Clicking inside of the list will give you different results than pressing the down arrow. this might be a browser extension I have installed or a browser setting I have turned on to remember my past choices for things?