JSFiddle - React, Tailwind, and code Playground

HTML

<form action="irrelevant">
<div>
<select><option>1</option><option>2</option><option>3</option></select>
    <input type='text'/>
    <button>Hello</button>
</div>
<div>
    <select><option>1</option><option>2</option><option>3</option></select>
    <input type='text'/>
    <button>Hello</button>
</div>
<div>
    <select><option>1</option><option>2</option><option>3</option></select>
    <input type='text'/>
    <button>Hello</button>
</div>
<div>
    <select><option>1</option><option>2</option><option>3</option></select>
    <input type='text'/>
    <button>Hello</button>
</div>
</form>

JavaScript

$('button').click( function(){ 
$(this).siblings().filter('select').val('3');
    return false;
});