Appending scripts to end body tags with .render()

[kevinmu17]

Is there a way to achieve this allready?

I have some functions in the window object

window.recaptchaCallback

But this isn't working because the scripts are loaded directly after the rendered div instead of appended at the end body tags.
{{ craft.googleRecaptcha.render({'data-callback': 'window.recaptchaCallback' }) }}