JSFiddle - React, Tailwind, and code Playground

HTML

<span id='a' data-id='111'>id</span>
<span id='a' data-id='321'>target</span>
<button id='send'>send</button>
<br>
<span id='a' data-id='456'>id</span>
<span id='a' data-id='234'>target</span>
<button id='send'>send</button>
</br>
<span id='a' data-id='321'>id</span>
<span id='a' data-id='234'>target</span>
<button id='send'>send</button>
</br>
<span id='a' data-id='213'>id</span>
<span id='a' data-id='123'>target</span>
<button id='send'>send</button>

JavaScript

$('button').each(function() {
    var a = $(this).prev().data().id;
    var b = $(this).prev().prev().data().id;
    
    $(this).attr("href", "http://fde&id="+a+"hve&target="+b);
});