Complete-Web-Development-BootCamp/tut8.htm at master · SakshamAgg1709/Complete-Web-Development-BootCamp · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Visibility And Z index</title>
    <style>
.box{
    width: 170px;
    height: 170px;
    border: 2px solid red;
}

#box1{
    background-color: rgb(12, 247, 12);
    position: relative;
    top: 49px;
    z-index: 50;
}

#box2{
    /* visibility: hidden; will hide the element but will show its space  */
/* display: none; will hide the element and the space  */
    background-color: yellow;
/* z index will work only with position: relative absolute and fixed sticky  */
position: relative;
top: 14px;
z-index: -1;
}
#box3{
    background-color: rgb(230, 19, 166);
}
#box4{
    background-color: rgb(89, 20, 201);
}
    </style>
</head>
<body>

    <!-- here $ is used to add no.  in series -->
    <div class="box" id="box1"></div>
    <div class="box" id="box2"></div>
    <div class="box" id="box3"></div>
    <div class="box" id="box4"></div>
</body>
</html>