in src/editor/sandbox/openwith/codepen.js [9:29]
export default function openWithCodePen(title, scripts, css) {
const templates = getTemplates(title, scripts, css);
const form = document.createElement('form');
form.method = 'POST';
form.action = 'https://codepen.io/pen/define/';
form.target = '_blank';
form.style.display = 'none';
const input = document.createElement('input');
input.setAttribute('name', 'data');
input.setAttribute('type', 'hidden');
input.setAttribute('value', JSON.stringify(templates));
form.appendChild(input);
document.body.appendChild(form);
form.submit();
document.body.removeChild(form);
}