reCaptcha V2: How to show image challenge only?

[Pijush Debnath]

I was trying to display image challenge only and not want to display any other type of challenge. I found a parameter 'data-type', but it doesn't looks like working. Any suggestion?

This is the code I have used: 

<div class="g-recaptcha"

data-sitekey="6Ld6PQ0UAAAAAB5VFIXCP7t2tMKiGG7CrNkIWk8c" data-type="image"></div>

 Thanks 

[My1]

well image challenge means essentially visual challenge, you dont really get control about the specific challenges used.

[Evan Sharp]

https://developers.google.com/recaptcha/docs/faq#some-users-are-not-seeing-the-checkbox-recaptcha-widget-whats-happening claims that images will display under 'fallback' conditions and goes on to mention that you can force 'fallback' by passing fallback=true in the resource:

<script src="https://www.google.com/recaptcha/api.js?fallback=true" async defer></script>

It is noted that it is mainly for testing because this fallback experience is not the best experience.