JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://cdnjs.cloudflare.com/ajax/libs/mustache.js/0.5.0-dev/mustache.min.js"></script>
<script type=text id=tpl>
<ul>
    {{#price}}
        <li>{{commaFormat}}</li>
    {{/price}}
</ul>
</script>

JavaScript

var tpl = $('#tpl').html(),
    data = {
        price: ['1234', '123', '123456', '1234567890'],
        commaFormat: function() {
            // adapted from http://stackoverflow.com/questions/2901102/how-to-print-number-with-commas-as-thousands-separators-in-javascript
            return this.replace(/\B(?=(\d{3})+(?!\d))/g, ",");
        }
    },
    html = Mustache.to_html(tpl, data);

document.write(html);