javascript - Strange jquery 'viewport' behaviour -


i'm developing wordpress site has lot of animations effects - fade-in , fade-out on changeing tabs etc. 1 of them slideing in boxes bottom when element in viewport. i'm using script:

function checkvisible() {     var elm = this;     var eval = eval || "visible";     var vph = $(window).height(),         st = $(window).scrolltop(),          y = $(elm).offset().top,         elementheight = $(elm).height();      if (eval == "visible") return ((y < (vph + st)) && (y > (st - elementheight)));  }    $(window).scroll(function(){   $('.module').filter(checkvisible).addclass('come-in'); });  $( document ).ready(function() {   $('.module').filter(checkvisible).addclass('come-in');  });

it's not mine, found smowhere on stackoverflow. problem is, worked while, after time started act strange: on subpages adds 'come in' class without checking if 'module' in viewport or not. , on 'post' pages works.. when scrolling bottom top.

as read lot of problems may caused double jquery cdn, don't think thats problem:

    <head> <meta charset="utf-8" />  <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"> <title>osiemzero</title> <script type="text/javascript">document.body.classname+='animate-in'</script> <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script> <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script> <script src="http://serwer1460278.home.pl/osiemzero_wp/wp-content/themes/osiemzero/js/animations.js"></script> <script src="http://serwer1460278.home.pl/osiemzero_wp/wp-content/themes/osiemzero/js/custom_css.js"></script> <script type='text/javascript' src='http://serwer1460278.home.pl/osiemzero_wp/wp-content/plugins/ml-slider/assets/sliders/flexslider/jquery.flexslider-min.js?ver=3.3.6'></script> <link rel='stylesheet' id='metaslider-flex-slider-css'  href='http://serwer1460278.home.pl/osiemzero_wp/wp-content/plugins/ml-slider/assets/sliders/flexslider/flexslider.css?ver=3.3.6' type='text/css' media='all' property='stylesheet' /> <link rel="stylesheet" href=" http://serwer1460278.home.pl/osiemzero_wp/wp-content/themes/osiemzero/css/font-awesome.min.css"> <link rel="stylesheet" href="http://serwer1460278.home.pl/osiemzero_wp/wp-content/themes/osiemzero/css/styles.css">    </head>

i tried lot of scripts check if element in viewport (even jquery plugins), had same effect, that's not problem.

thank possible.


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