Example for integrating a basic contact form with Netlify’s form handling feature (based on the default Gatsby starter)

Demo: https://gatsby-form-example.netlify.com

This example site uses react-google-recaptcha to render the reCAPTCHA widget.

To make the reCAPTCHA example work in your own copy of this site, you’ll need to do the following:

1. Sign up for a reCAPTCHA API key pair for your site.
2. Log in to your Netlify account, and add the following environment variables to your site’s Settings > Build & deploy > Build environment variables:

• SITE_RECAPTCHA_KEY with your reCAPTCHA site key.
• SITE_RECAPTCHA_SECRET with your reCAPTCHA secret key.

Important: the environment variables need to be called SITE_RECAPTCHA_KEY and SITE_RECAPTCHA_SECRET for the Netlify backend to find them. If you add a GATSBY_ prefix to the variable names, the Netlify backend won't recognize them, the reCAPTCHA verification will fail, and your form submissions won't be stored.

3. Change the build command for your site to

echo SITE_RECAPTCHA_KEY=$SITE_RECAPTCHA_KEY >> .env.production && gatsby build

This will make the SITE_RECAPTCHA_KEY available to the Gatsby build in production.

To see the reCAPTCHA widget locally, add SITE_RECAPTCHA_KEY=your-reCAPTCHA-API-site-key to your local .env.development file.

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 (Thanks to @phmu_office for the heads up ✨)