Member Avatar for azapovjednik

Hello,
on the top of the page I have a menu created in CSS.... with drop down lists... all looks nice..

later... I added wowslider right below... wowslider plugin is really cool... but the dropdown menus fall behind the slider!

so I find it is because of z-index properties... and I correct it... now... dropdown menu fall properly over the slider, but as a result my slider doesnt have those fancy effects anymore... it just changes pictures and no controls... but if I reverse z-index setting to original... then jquery effects are back!

is there any way to fix it? is my question understandable? please help! thanks

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Dani AI

Generated

Most likely cause: stacking contexts. Setting z-index (or introducing transforms/opacity/will-change) on a parent element can create a new stacking context that isolates child layers. Many slider “fancy” transitions are implemented with stacked elements and CSS transforms; when a dropdown or its ancestor creates a conflicting stacking context the slider’s layering/transitions can no longer be rendered the way the plugin expects, so the effect falls back to a simple image swap.

Practical fixes to try (safe, incremental):

  • Only give z-index to the dropdown panel itself (not every ul/li). The panel must be positioned for z-index to behave predictably:

    /* target the dropdown panel, not the whole menu list */
.nav .dropdown-panel {
  position: absolute;
  z-index: 10000;
}

  • If the dropdown still gets trapped inside a stacking context, move the dropdown node out of the header into the document root and absolutely position it (done at build time or by JavaScript). That puts it outside any transformed ancestor so stacking is straightforward:

    document.querySelectorAll('.dropdown-panel').forEach(p => document.body.appendChild(p));

  • Inspect the slider wrapper (use DevTools). Look for transform, will-change, opacity < 1, or filter on the slider or its ancestors; those create stacking contexts. Either remove/adjust those properties or ensure the dropdown is outside that context.

Quick checklist: use the inspector to find which element creates the stacking context, avoid applying global z-index to list elements, prefer z-index on the positioned dropdown panel or move panels to body. As discovered, switching to a slider whose effects don’t rely on the same transform/z-index behavior (Nivo) also resolves the symptom, but the above lets the original slider keep its effects while allowing dropdowns to appear on top.

Member Avatar for azapovjednik

here is some code to help you understand my situation:
style.css belonging to wowslider div:

#wowslider-container1 { 
    zoom: 1; 
    position: relative; 
    max-width:940px;
    margin:0px auto 0px;
    z-index:90;
    border:none;
    text-align:left; /* reset align=center */

and here is the other menu.css file describing the properties od a menu:

ul, li {
    font-size:14px; 
    font-family:Arial, Helvetica, sans-serif;
    line-height:21px;
    text-align:left;

Now, while like this.. menus show behind the slider and slide domino effect is perfectly working... but if I add z-index value to ul, li ... then I get menu in the front but I lose the domino effects of the slider...

Strange thing is: if I add any z index value to ul, il then, menus are still in the back but no domino effect on the slider... I have to delete the zindex value from UL IL to get the effects back....

I am lost :) anyone cares to explain? thanks

Member Avatar for azapovjednik

well... I resolved the issue by using Nivo Slider... it doesnt lose the effects after I set the css of menu to z-index=9999;
Thanks all

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