JSFiddle - React, Tailwind, and code Playground

by Zhuoyu Qian

HTML

<button id="replace">
  replace
</button>
<div id="foo" contenteditable>
  <h1> World</h1>
  ff
</div>

JavaScript

replace.addEventListener('click', e=>{
  foo.focus();
  document.execCommand('selectAll');
  document.execCommand('insertHTML',null, `<h1> World</h1>eer`);
});