JAVASCRIPT

how to fix header on scroll

as per https://sigmascripts.com/how-to-fix-header-on-scroll/ 

<div id="header" class="big_header"> <p>TalkersCode Sticky Header</p> </div>

<script>
$(window).scroll(function()
 {
 if ($(this).scrollTop() > 1)
 {
 $('#header').addClass("sticky_header");
 }
 else
 {
 $('#header').removeClass("sticky_header");
 }
 });
</script>

css static header on scroll

table thead,
table tfoot {
  position: sticky;
}
table thead {
  inset-block-start: 0; /* "top" */
}
table tfoot {
  inset-block-end: 0; /* "bottom" */
}