JSFiddle - React, Tailwind, and code Playground

HTML

<div class="tg"></div>

JavaScript

$(function(){
  var REPLACE_HTML_STRING = `<a id="replace_a_tag" href="//test.html" target="_top" style="opacity:1; background-image:url({img_src});"></a>`;

  var regExp = new RegExp('{img_src}', 'g');
  var temp_html = '';
  var img_src = '//element_1/element_2/test.png';
  temp_html = REPLACE_HTML_STRING.replace(regExp, img_src);
  console.log(temp_html);
  jQuery( '.tg' ).text( temp_html );
});