JSFiddle - React, Tailwind, and code Playground

JavaScript

var html = '111 < script type="text/javascript">alert(123);< /script> 222'.replace(/< /g, '<');

insertHtml(document.body, html);

//----------------------------------------
function insertHtml(elem, text) {
	elem.innerHTML = text;
  
  var scripts = elem.querySelectorAll('script');

  for (var i = 0; i < scripts.length; ++i) {
    var scriptElem = scripts[i];
    var newScriptElem = document.createElement('script');
    var attrs = scriptElem.attributes;
    var attribute;
    if (scriptElem.src) {
      newScriptElem.async = false;
      newScriptElem.src = scriptElem.src;
    } else {
      newScriptElem.innerHTML = scriptElem.innerHTML;
    }
    if (attrs.length > 0) {
      for (var attrNo = attrs.length; attrNo--;) {
        attribute = attrs[attrNo];
        if (!(attribute.name in newScriptElem.attributes)) {
          newScriptElem.setAttribute(attribute.name, attribute.value);
        }
      }
    }
    scriptElem.parentNode.removeChild(scriptElem);
    elem.appendChild(newScriptElem);
  }
}