title: invisible recaptcha - how to programmatically bind to a button?
body: <p>Has anyone succeeded in doing so?</p>
  
  <p><a href="https://developers.google.com/recaptcha/docs/invisible#explicit_render" rel="nofollow noreferrer">Google's documentation</a> is very unclear about binding to a button in runtime. It just says:</p>
  
  <blockquote>
    <p>Deferring the binding can be achieved by specifying your onload
    callback function and adding parameters to the JavaScript resource.</p>
  </blockquote>
  
  <p>And that's it. No actual instructions on how to bind it to a button-element programmatically.</p>
  
  <p>PS. I cannot use "automatic binding" since there's some logic involved - should I have recaptcha or not.</p>