This is an example site integrating Netlify’s form handling with Gatsby
Forms stop working after upgrading to Gatsby v2
This can be caused by the offline-plugin. Workaround is to use
?no-cache=1 in the POST url to prevent the service worker from handling form submissions
If you are planning to add reCAPTCHA please go to imorente/gatsby-netlify-form-example for a working example.