JSFiddle - React, Tailwind, and code Playground

HTML

<div style="width:140px;">
    <select name="selectbox" size="5"  id="selectbox" >
        <option>one two three four five six seven eight</option>
        <option>seven eight</option>
        <option>nine ten</option>
        <option>one two three four five six</option>
        <option>seven eight</option>
        <option>nine ten</option>
        <option>one two three four five six seven eight nine ten</option>
        <option>seven eight</option>
        <option>nine ten</option>
        <option>one two three four five six</option>
        <option>seven eight</option>
        <option>nine ten</option>
    </select>
</div>

CSS

div{   
 overflow-x:auto; 
 }