Requirement Description

• Appearance is also important
  From a user's point of view, they tend to use combobox as a dropdown because it looks prettier than other similar components like <listbox mold="select"> and <selectbox>. Currently, it looks similar to native OS style:
  

Combobox looks prettier and styled:

• Combobox is not a good dropdown
  But combobox is actually a textbox with a popup. it's not made for selection. If a user enters a non-existed item, it will cause an exception.

proposed solution

According to https://www.filamentgroup.com/lab/select-css.html, now we can make <select> pretty and consistent across browsers. I propose to make <selectbox> prettier in order to be used by users.

Examples like: https://freefrontend.com/css-select-boxes/

• <listbox mold="select"> has the same issue, if we decide to proceed, please create another issue for it.