WP/ACF - Load Google Map API if it needs

gistfile1.txt

/**
 * Load Google Map only if it needs (when we load ACF field type='google_map')
 */

add_action( 'acf/init', function () {
	acf_update_setting( 'google_api_key', ( get_theme_mod( 'google_maps_api' ) ?: 'YoUrLiCeNsECoDePlAcEhErE' ) );
} );

add_action( 'wp_enqueue_scripts', function () {
	wp_register_script( 'google-map', 'https://maps.googleapis.com/maps/api/js?key=' . acf_get_setting( 'google_api_key' ) . '&v=3.exp', null, false, true );
	wp_register_script( 'google-map-init', get_template_directory_uri() . '/js/google-map-init.js', [ 'google-map' ], false, true );
}, 5 );

add_filter( 'acf/load_field/type=google_map', function ( $field ) {
	wp_enqueue_script( 'google-map-init');

	return $field;
} );