Opening a datepicker

Good afternoon,

I’m currently using this plugin to adapt the checkout field accordingly. I managed to make fields appear en re-appear when the option is selected.

Yet, the datepicker will not open. I’ve tried adding the following snippet via the plugin ‘Code Snippets’:

————-

function custom_wooccm_js_datepicker_billing_args() {

echo ‘
changeMonth: true,
changeYear: true
‘;

}
add_action( ‘wooccm_js_datepicker_billing_args’, ‘custom_wooccm_js_datepicker_billing_args’ );

————-

This doesn’t seem to work, could anyone please help me?

Kind regards,

Roy