Form scroll functions and fixed form for landing pages

scripts.js

//Scroll to form on button click and focus on first input
$('#up-to-form').on('click', function(e) { 
  e.preventDefault();
  $('html, body').animate({
        scrollTop: $('.form-container').offset().top - 20
    }, 'slow');
   $('.form-container form input').first().focus();
});

//Make form fixed so it stays in view on desktop viewport
$(window).scroll(function() {    
    var scroll = $(window).scrollTop();

    if (scroll >= 50) {
        $(".form-fixed-wrapper").addClass("fixed-scroll");
    }
    if (scroll <= 50) {
        $(".form-fixed-wrapper").removeClass("fixed-scroll");
    }
});