What is the best way to adjust the z-index in JavaScript?

I've scoured every corner but still can't find a solution. Here's the situation - I created a popup with an onclick event that overlays my posts wrapper. However, this setup prevents me from scrolling down, so I adjusted the z-index accordingly. While this allowed me to scroll again, clicking on the link causes the popup to appear behind my posts wrapper. No matter how I tweak the z-index values, it either stays hidden behind the wrapper or blocks scrolling when brought to the front. My goal is to have the popup at a lower z-index than the wrapper when not clicked, and a higher z-index when clicked. How can I achieve this? I received the code from a friend, so here it is!

#wrapper{
   {block:IndexPage}
   width:270px;
   {/block:IndexPage}
   {block:PermalinkPage}
   width:270px;
   {/block:PermalinkPage}
   margin-top:100px;
   margin-right: 250px;
   margin-left: auto;
   height: 400px;
   overflow:scroll;
   overflow-x:hidden;
   background-color: transparent;
   background-repeat: repeat;
   margin-bottom:100px;
   padding:15px;
   border: 3px solid #f3f2f2;
   z-index: 300;

}
#popup {
  position: fixed;
  top:100px;
  width:297px;
  height:490px;
  right: 250px;
  font:10px;
  opacity: 0.0;
  padding: 5px;
  background-color:  #f8f6f6;
  color: #cccbcb;
  z-index:400;
}

And here is the Javascript snippet:

<script language="javascript">
 $(document).ready(function() {
   $('a#clickbutton').click(function() {
      $('.t',this).toggle();
   });

   $("#popup").css({"opacity": "0.0", "z-index": "-10"});
   $("#clickbutton").toggle(
      function () {
         $("#popup").animate({"opacity": "1.0", "z-index": "400"}, "fast");
      },
      function () {
         $("#popup").animate({"opacity": "0.0", "z-index": "-30"}, "fast");
   });
 });
</script>

Answer №1

When using jQuery animate, it is important to note that the z-index property may not behave as expected.

To work around this issue, you can split the animation and z-index setting into separate steps like so:

$("#element").animate({"opacity": "1.0"}, "fast").css("z-index", "400");

and

$("#element").animate({"opacity": "0.0"}, "fast").css("z-index", "-30");

This approach works because jQuery allows chaining functions together, making it easy to manipulate elements in a sequence.

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