button_up.js?v=1790243685.2546524191076

js docsvision.com collected 2026-09-24 09:55:07 UTC 575 bytes, 21 lines download raw bytes

1var btn = $('#button');
2var allheight = $(document).outerHeight(true);
3var windowheight = $(window).height();
4var buttonwindowview = windowheight * 4;
5var buttonview = windowheight * 3;
6console.log(allheight);
7console.log(windowheight);
8$(window).scroll(function() {
9   if (allheight > buttonwindowview) {
10      if ($(window).scrollTop() > buttonview) {
11        btn.addClass('show');
12      } else {
13        btn.removeClass('show');
14      }
15    }
16});
17
18btn.on('click', function(e) {
19  e.preventDefault();
20  $('html, body').animate({scrollTop:0}, '300');
21});

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