JSFiddle - React, Tailwind, and code Playground

HTML

<span id="name"></span>
<button onClick="showName()">Show Name
</button>
<button onClick="foo()">Send money
</button>

<script>
function showName() {
  var badCode = "John<img src=\"whatever.png\" onerror=\"foo = function() {alert('boom');}\" />";
  console.log(badCode);
  document.getElementById("name").innerHTML = badCode;
}
</script>

<hr/>
After clicking "Show name" function <i>foo</i> should be added.