JSFiddle - React, Tailwind, and code Playground
HTML
1. <input type="text" id="focus_1" />
<input type="button" value="Focus 2" onclick="$('#focus_2').focus()" />
2. <input type="text" id="focus_2" />
<input type="button" value="Focus 1" onclick="$('#focus_1').focus()" />