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alphabetical indexing onscroll
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <title>Alphabetical Indexing</title> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1"> | |
| <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script> | |
| </head> | |
| <body> | |
| <style> | |
| .fixed_name { | |
| position: fixed; | |
| width: 100%; | |
| height: 40px; | |
| background: #ccc; | |
| text-align: center; | |
| } | |
| .alp { | |
| display: none; | |
| color: #000; | |
| } | |
| .alp.active { | |
| display: block; | |
| } | |
| .modal-bd-height { | |
| margin: 0 0 0 0; | |
| padding: 40px 0 0 0; | |
| height: 400px; | |
| overflow-y: scroll; | |
| } | |
| .modal-bd-height div { | |
| width: 100%; | |
| background: #000; | |
| color: #fff; | |
| margin: 0 0 384px 0; | |
| } | |
| </style> | |
| <div class="fixed_name"> | |
| <div class="alp active" data-in="block_A">A</div> | |
| <div class="alp" data-in="block_B">B</div> | |
| <div class="alp" data-in="block_C">C</div> | |
| <div class="alp" data-in="block_D">D</div> | |
| </div> | |
| <div class="modal-bd-height"> | |
| <div id="block_A">A</div> | |
| <div id="block_B">B</div> | |
| <div id="block_C">C</div> | |
| <div id="block_D">D</div> | |
| </div> | |
| </body> | |
| <script> | |
| $(window).on('scroll', function() { | |
| if ($(this).scrollTop() > 1) { | |
| $('header').addClass('inSticky slideInDown'); | |
| } else { | |
| $('header').removeClass('inSticky slideInDown'); | |
| } | |
| }); | |
| $('document').ready(function() { | |
| $('.modal-bd-height').on("scroll", onScroll); | |
| function onScroll(event) { | |
| var scrollPos = $('.modal-bd-height').scrollTop(); | |
| $('.alp').each(function() { | |
| var getE = $(this) | |
| var getAtt = $(this).attr('data-in'); | |
| var pos = $('#' + getAtt).position().top; | |
| if (pos <= 100) { | |
| $('.alp').removeClass('active'); | |
| $(this).addClass('active'); | |
| } else { | |
| $(getE).removeClass('active'); | |
| } | |
| }); | |
| } | |
| }); | |
| </script> | |
| </html> |
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