JSFiddle - React, Tailwind, and code Playground

HTML

<div id="country">
    <span>B</span>
    Bangladesh
</div>

<div id="capital">
    Dhaka
    <span>D</span>
</div>

JavaScript

$(function(){
console.log($("#country").find("span")[0].nextSibling.nodeValue);
console.log($("#capital").find("span")[0].previousSibling.nodeValue);
});