transfer lab javascript

$(function() {
    $('main > div').on('click', '.modal-body > form  :checkbox', function(event) {
    
        let form = $(this).parents('form');
    
        let paramContainer = form.children().eq(5);
    
        let btnDiv = form.children().eq(6);
    
        paramContainer.toggleClass('d-none');
    
        btnDiv.children().toggleClass('d-none');
    });
});