Issue with the Z-Index property not functioning as expected on unordered lists within a dropdown menu

I have a dropdown menu that opens to the left, but it is displaying underneath the content. I attempted adjusting the z-index of the content to 1 and the dropdown to 2, however, this did not resolve the issue.

Here is a sample in jsFiddle: https://jsfiddle.net/dgy95y8q/8/

CSS for navbar when not collapsed:

.navmenu {
    width: 0px;
    margin-top: 20px;
    padding-top: 10px;
    padding-bottom: 10px;
    background: #fff;
    text-align: center;
    position: fixed;
    left: 180px;
    top: 25px;
    box-shadow: 0 0 10px 2px rgba(0, 0, 0, 0.15);
    visibility: hidden;
    opacity: 0;
    -webkit-transition: all 300ms ease;
    z-index: 0;
    transition: all 300ms ease;
}

After collapsing:

.navmenu.opened {
    visibility: visible;
    opacity: 1;
    width: 240px;
    z-index: 1;
}

CSS for the main content wrap:

.main {
    float: left;
    width: 85%;
    background-color: rgb(255,255,255);
    position: relative;
    z-index: 2;
}

https://i.stack.imgur.com/xXEDo.png

Answer №1

To solve the issue, simply update the .sidebar-left z-index value to 2

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