JSFiddle - React, Tailwind, and code Playground

HTML

<div id="myDiv"></div>

JavaScript

// Demonstration: Append a <p> tag to myDiv.  The <p> will contain a <strong>
// tag followed by un-nested text.
Ext.DomHelper.append("myDiv", {
	tag: "p",
	children: [
		{ tag: "strong", html: "To Do: " },
		"Water the garden"
	]
});


// By default, if you give a string as a child (as in the above example), Ext
// will insert the string as innerHTML.  This is sometimes convenient, but it
// could open your application to cross-site scripting vulnerabilities.  It is
// therefore recommended that you force Ext to create text nodes, as shown below.

var htmlString = "I contain <em>HTML</em>! <br />";

// Prior to safety check: write to innerHTML.
Ext.DomHelper.append("myDiv", htmlString);

// Force text node creation:
Ext.DomHelper.useDom = true;

// After safety check: all characters are displayed literally.
Ext.DomHelper.append("myDiv", htmlString);