JSFiddle - React, Tailwind, and code Playground

HTML

<div contenteditable="true">
  <div style="width:20px; height: 20px; border: solid"></div>
</div>

JavaScript

window.focus();
const editingHost = document.querySelector("div[contenteditable]");
editingHost.focus();
getSelection().collapse(editingHost.querySelector("div"), 0);