To create the desired effect, it may not be possible to expand the dropdown menu of a select
element. One approach could be to replace the dropdown with a textbox and display suggestions in a div
below it upon clicking the textbox.
For an example, you can refer to this code snippet.
If you are unfamiliar with jQuery or Angular, you can implement this functionality using plain Javascript as shown in the example provided.
Drawbacks: This method won't offer search functionality within the suggestions list; users will have to choose from the options displayed.
To enable search-like features, you would need to enhance the code to update the suggestions list dynamically on each keystroke.
Furthermore, you will need to style the textbox to resemble a dropdown for a more seamless user experience.
Tip: Consider examining your competitors' websites to analyze their UI elements, including dropdown menus. You can use developer tools to inspect and understand how these components are implemented.
I hope this information proves helpful for your project.