Preview:
<style>
	html, body {
  		overflow-y: hidden;
  	}
</style>

<script>
  $(function(){
  setTimeout(function(){
    $('html')
    .css({
      'overflow-y': 'scroll'
    })
    
  	window.scrollTo(0, 0);
  }, 3000);
});
</script>
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