Layering one div over another using z-index

I am attempting to stack div2 on top of div1

http://jsfiddle.net/user1212/QsLVB/

<div id="div1"></div>
<div id="div2"></div>

#div1{
    width: 200px;
    height: 200px;
    background-color: olive;
    float: right;
    position: relative;
    z-index: 1;
}
#div2{
    width:100px;
    height: 100px;
    background-color: orange;
    float: right;
    position: relative;
    z-index: 2;
}

I want both elements to be aligned to the right.

Answer №1

There are several ways to achieve overlapping elements.

For the first example, you can utilize negative margins by setting:

#div2{
    margin: 20px -100px 0 0;
}

Check out the result in this JSFiddle demo.

In the second example, you can nest one div within another to create overlap. In this scenario, z-index won't have an effect as the child element will always appear above the parent:

<div id="div1">
<div id="div2"></div>
</div>

Alternatively, you can explore using position: absolute along with top/right values for achieving overlap.

Answer №2

#box1{
  width: 200px;
  height: 200px;
  background-color: olive;
  position: absolute;
  z-index: 1;
  right: 0;
}
  #box2 {
  width:100px;
  height: 100px;
  background-color: orange;
  position: absolute;
  z-index: 2;
  right: 0 ;
}

Instead of using negative margins or complex adjustments, you can simply modify your current CSS to resolve the issue. I tested it with my code and it worked perfectly. This solution is ideal for your situation.

When layering elements, make sure to use either position: absolute or position: fixed (both serve similar purposes in this scenario).

By using position: absolute (or fixed), you can align one or more edges of each div using properties like top, right, bottom, and left. While these are not required, setting at least one will fix that edge to its specified pixel position within the containing div.

If you place these two divs within the body tag or ensure they do not need to extend beyond their outer container, setting "right: 0;" for each div will position them similarly to using float: right for relatively positioned divs (as in your original code). Since they are absolutely positioned, they can overlap while occupying the same space.

Lastly, you can control which div appears on top by adjusting the z-index value.

Cheers! 😄

Answer №3

One option is to adjust the left or right property of div2

Check out a demo using left

#div2 {
    ...
    left: 150px;
}

Alternatively, instead of using float:right, you could utilize position:absolute with right

View the Demo Here

#div1, #div2 {
    /* float: right; // removed */
    position: absolute; /* changed from relative */
    right: 0; /* added */
}

Answer №4

If you want to achieve this effect, simply nest div2 inside div1. Give div2 an absolute position with the property right: 0, while its parent div1 should have a relative position.

You can view the result here: http://jsfiddle.net/heGJt/

Here is the simplified CSS code:

#div1 {
    position: relative;
    width: 200px;
    height: 200px;
    background-color: olive;
    float: right;
}
#div2 {
    width:100px;
    height: 100px;
    background-color: orange;
    position: absolute;
    right: 0;
}

And the corresponding HTML structure:

<div id="div1">
  <div id="div2"></div>
</div>

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