In our case, first click the Save button, then export in .zip format (see instructions below).
We have the form ready, now we need to upload the form to the internet so we can link to it from the administration interface. In our case we will use the GitHub site. More information can be found here.
If you use a tool other than codepen.io, the form code will look like this.
The last step
You created an entry form using codepen.io. We then exported it to our computer. We have uploaded the exported folders to the GitHub repository and then switched on the GitHub site. So we have a link to our form that we put into the administration interface.
window.parent.postMessage({
type: 'ADD_CUSTOM_DATA',
name: 'custom_field_name', // parameter name from call params
value: 'any' // string and max 2048
}, '*');