JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://builds.handlebarsjs.com.s3.amazonaws.com/handlebars-v2.0.0.js"></script>
<script id="template" type="text/x-handlebars">
    {{foo}}
    
    {{>partial this}}
</script>

<script id="partial" type="text/x-handlebars">
    {{foo}}
</script>

<div id="result"></div>

JavaScript

var templateString = document.getElementById('template').innerHTML;
var partialString = document.getElementById('partial').innerHTML;
var resultEl = document.getElementById('result');

Handlebars.registerPartial('partial', partialString);

var template = Handlebars.compile(templateString, { noEscape: true });

resultEl.innerHTML = template({
    foo: '<h1>foo</h1>'
});