Sample of https://github.com/ftlabs/ftdomdelegate

index.html

<script src="http://wzrd.in/standalone/dom-delegate@latest"></script>
<script>
    document.addEventListener("DOMContentLoaded", function() {
        domDelegate(document.body).on('click', 'button', handleButtonClicks)
        document.body.innerHTML = '<button>buton</button>'
    })

    function handleButtonClicks(event) {
        console.log('click', event)
    }
</script>