I have a signup form with AJAX so that I want to refresh Recaptcha image anytime an error is occured (i.e. username already in use).
I am looking for a code compatible with ReCaptcha to reload it using JavaScript.
Important: Version 1.0 of the reCAPTCHA API is no longer supported. Please upgrade to Version 2.0.
You can use grecaptcha.reset(); to reset the captcha.
Source: https://developers.google.com/recaptcha/docs/display#js_api