How To Install a Checkbox Trigger in Kartra

Use the code below in the Google Chrome Console to extract the form CSS for your Kartra submit button

$('.kartra_optin_submit_btn').closest('form').attr('class').split(' ').filter(className => className.startsWith('form_class'))

For more information on centering your widget visit https://docs.opesta.com/advanced-trigger-styling/how-to-center-trigger-widgets