What are the standard stacking order rules for elements in HTML?

Question

What are the standard stacking order rules for elements in HTML?

Trying to understand the default HTML rules for element stacking order. Are there any restrictions regarding the order of parents and children or sibling elements in a single row? Or is it solely dependent on CSS?

For clarification, consider this example where element A is stacked above element B: Link

Take a scenario with complex parent-child combinations like this:

<div id="A">
    <div id="B">
        <div id="D"></div>
    </div>
    <div id="C"></div>
</div>

Hoping the question is clear.

UPDATE: Based on the response below, it's been determined that by default HTML will stack elements coming after others above previous elements when their position is either fixed or absolute.

Check out this link: https://jsfiddle.net/s8nzaoh9/

html css position

Answer 1

Answer №1

When it comes to stacking elements, the key factor is how you arrange them. Typically, they will continue to stack unless certain rules, like z-index, are applied. Essentially, the element with a higher z-index value will appear in front of other elements with lower values. Utilizing CSS is crucial for resolving any stacking conflicts that may arise. While you can pile up as many elements as you desire, the end result may be chaotic without proper styling. Experimenting with different z-index values can help you understand how elements overlap each other.

<!DOCTYPE html>
<html>
<head>
<title></title>
<style>
#box1,#box2,#box3{
width: 200px;
height: 200px;
border:1px solid black;
position: relative;
}
#box1{
background-color: red;
z-index: 10;

}
#box2{
background-color: green;
margin-top: -30px;
z-index: 20;

}
#box3{
background-color: blue;
}
</style>
</head>
<body>

<div id="box1">
</div>

<div id="box2">
</div>

<div id="box3">
</div>
</body>
</html>

Feel free to adjust the z-index values and observe the changes in placement.

Answer 2

When it comes to stacking elements, the key factor is how you arrange them. Typically, they will continue to stack unless certain rules, like z-index, are applied. Essentially, the element with a higher z-index value will appear in front of other elements with lower values. Utilizing CSS is crucial for resolving any stacking conflicts that may arise. While you can pile up as many elements as you desire, the end result may be chaotic without proper styling. Experimenting with different z-index values can help you understand how elements overlap each other.

<!DOCTYPE html>
<html>
<head>
<title></title>
<style>
#box1,#box2,#box3{
width: 200px;
height: 200px;
border:1px solid black;
position: relative;
}
#box1{
background-color: red;
z-index: 10;

}
#box2{
background-color: green;
margin-top: -30px;
z-index: 20;

}
#box3{
background-color: blue;
}
</style>
</head>
<body>

<div id="box1">
</div>

<div id="box2">
</div>

<div id="box3">
</div>
</body>
</html>

Feel free to adjust the z-index values and observe the changes in placement.

What are the standard stacking order rules for elements in HTML?

Answer №1

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