As the web's native combobox, <input list> combined with <datalist> behaves inconsistently across browser engines and platforms. All modern browsers implement <datalist>, minus a few areas of support on Firefox, but vary in styling and behavior.

The proposed scope for this investigation:

• Popup rendering
  • Styling and positioning consistency
  • Desktop and mobile keyboard-suggestions displays
• Filtering behavior
  • How options are filtered against value
  • Case matching differences
• Display consistency when <option> text and value differ
• Affordance styling (the popup indicator icon)
  • Does this follow same convention of <select>?
• Browser engine consistency
  • Working as more than a text box
  • Options availability in landscape mode
  • Mobile landscape behavior
• A11y - roles and names as exposed to screen readers, keyboard navigation, escape behavior, and voice-control
• A11y - Page Zoom and text styling in popup
• A11y - AT inconsistencies