Using recaptcha with Firebase

Question

Surprisingly-even more when both are Google products-there is no information that I can find on how to integrate Recaptcha with Firebase. Is it even possible? If not, what can I use to validate humans on a Firebase app that has no auth?

Answer 1

This is a pretty old post, but here's the answer for fellow Google searchers like me. It's now built-in, and super easy to set up:

window.recaptchaVerifier = new firebase.auth.RecaptchaVerifier('recaptcha', {   'callback': (response) => {     // reCAPTCHA solved, allow signInWithPhoneNumber.     // ...   },   'expired-callback': () => {     // Response expired. Ask user to solve reCAPTCHA again.     // ...   } }) window.recaptchaVerifier.render() 

As tuananh mentions, make sure you add a <div id="recaptcha"></div>.