What is z-index?
- The z-index property specifies the stack order of an element.
- An element with greater stack order is always in front of an element with a lower stack order.
- z-index only works on positioned elements.
- z-index does not work with px it works only on numbers.
This will be our boilerplate:
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title> Visibility in CSS </title>
<style>
</style>
</head>
<body>
</body>
</html>
z-index values
i) auto: This property value sets the stack order equal to its parents. This is the default.
.box {
z-index: auto;
}
ii) number: Sets the stack order of the element. And we can also use negative numbers.
.box {
z-index: 1;
}
iii) initial: Sets this property to its default value.
.box {
z-index: initial;
}
iv) inherit: This property value will inherit the property from its parent element.
.box {
z-index: inherit;
}
Using z-index Properties
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title> z-index in CSS </title>
<style>
.box {
position: absolute;
top: 0;
left: 0;
background-color: purple;
width: 20rem;
height: 20rem;
z-index: -1;
}
.para{
color: white;
}
</style>
</head>
<body>
<div class="box"></div>
<p class="para">Welcome to CSS Master Series of Geeks Help</p>
</body>
</html>
Output:
