jQuery UI Slider overlap slidebar

I use a slider range (jquery ui) and a side navigation bar (w3 school).

The handler of the slider range overlap the side navigation bar when it extend.

css of the side bar:

/* ~~~~~~~~~~~~~~~~~~~~~~ SIDENAV ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
.sidenav
height: 100%;
width: 0;
position: fixed;
z-index: 1;
top: 0;
left: 0;
background-color: #111;
overflow-x: hidden;
transition: 0.5s;
padding-top: 60px;


.sidenav a
padding: 8px 8px 8px 32px;
text-decoration: none;
font-size: 25px;
color: #818181;
display: block;
transition: 0.3s;


.sidenav a:hover
color: #f1f1f1;


.sidenav .closebtn
position: absolute;
top: 0;
right: 25px;
font-size: 36px;
margin-left: 50px;


@media screen and (max-height: 450px)
.sidenav padding-top: 15px;
.sidenav a font-size: 18px;



No Overlap: When the handler is not in the same plan as the navigation bar

Overlap: When the handler is in the same plan as the navigation bar

What can be the cause of this overlapping?

1 Answer
1

The solution was given in the comment section.

The solution is to raise the z-index of the sidebar.

.sidenav
height: 100%;
width: 0;
position: fixed;
z-index: 10;
top: 0;
left: 0;
background-color: #111;
overflow-x: hidden;
transition: 0.5s;
padding-top: 60px;


As the sidebar should always be on top, maybe rise it to a high value to never have this problem.

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