Change settings here:

Show styling options  

Set or override styling options. The defaults are set by the selected style. Classes in the defaults can be selectively excluded with the “!class-name” notation

Try out the component here:

!! This should not move when the dropdown opens !!
<.live_select
   field={my_form[:city_search]}
   placeholder="Search for a city"
   update_min_len={3} />