A Polymer element for google recaptcha V2 and invisible.
bower install -S Zecat/google-recaptcha
<google-recaptcha
sitekey="YOUR_KEY"
value="{{token}}"
></google-recaptcha>
<google-recaptcha
sitekey="YOUR_KEY"
theme="dark"
type="audio"
size="compact"
on-google-recaptcha-response="_handleRecaptchaResponse"
></google-recaptcha>
<!-- Call the method `execute` on this element when you want a token -->
<google-recaptcha
sitekey="YOUR_KEY"
invisible
badge="inline"
></google-recaptcha>
<!-- Using prevent-auto-render, call the method `render` when you want to
display the recaptcha, then call `execute` to get a token -->
<google-recaptcha
sitekey="YOUR_KEY"
invisible
prevent-auto-render
></google-recaptcha>