Load gravity forms JS in footer

movegfjstofooter.php

// GF method: http://www.gravityhelp.com/documentation/gravity-forms/extending-gravity-forms/hooks/filters/gform_init_scripts_footer/
add_filter( 'gform_init_scripts_footer', '__return_true' );

// solution to move remaining JS from https://bjornjohansen.no/load-gravity-forms-js-in-footer
add_filter( 'gform_cdata_open', 'wrap_gform_cdata_open' );
function wrap_gform_cdata_open( $content = '' ) {
  $content = 'document.addEventListener( "DOMContentLoaded", function() { ';
  return $content;
}
add_filter( 'gform_cdata_close', 'wrap_gform_cdata_close' );
function wrap_gform_cdata_close( $content = '' ) {
  $content = ' }, false );';
  return $content;
}

Hi, Found the same code aswell, here is a improvement on the AJAX calls!
EDITED: 2019-09-05

// Force Gravity Forms to init scripts in the footer and ensure that the DOM is loaded before scripts are executed.
add_filter( 'gform_init_scripts_footer', '__return_true' );
add_filter( 'gform_cdata_open', 'wrap_gform_cdata_open', 1 );
add_filter( 'gform_cdata_close', 'wrap_gform_cdata_close', 99 );

function wrap_gform_cdata_open( $content = '' ) {
	if ( ! do_wrap_gform_cdata() ) {
		return $content;
	}
	$content = 'document.addEventListener( "DOMContentLoaded", function() { ' . $content;
	return $content;
}

function wrap_gform_cdata_close( $content = '' ) {
	if ( ! do_wrap_gform_cdata() ) {
		return $content;
	}
	$content .= ' }, false );';
	return $content;
}

function do_wrap_gform_cdata() {
	if (
		is_admin()
		|| ( defined( 'DOING_AJAX' ) && DOING_AJAX )
		|| isset( $_POST['gform_ajax'] )
		|| isset( $_GET['gf_page'] ) // Admin page (eg. form preview).
		|| doing_action( 'wp_footer' )
		|| did_action( 'wp_footer' )
	) {
		return false;
	}
	return true;
}