$ -> iframeBody = document.getElementById("box-preview-iframe").contentDocument.body comp = React.render(React.createElement(Preview, {}), iframeBody) setInterval((()-> date = new Date console.log body = """<div> <span>#{date.getHours()}</span>: <span>#{date.getMinutes()}</span>: <span>#{date.getSeconds()}</span> </div>""" React.render(React.createElement(Preview, {body}), iframeBody) ),1000) Prev