Div with see-through overlay area

I am attempting to create a visual effect on my webpage where there is a semi-transparent overlay covering all elements except for one specific div.

Here is an illustration of the structure of my page:

<div id="d1">
    <div id="d2"></div>
    <div id="left"></div>
    <div id="d3"></div>
    <div id="right"></div>
    <div id="d4"></div>
</div>
<div id="overlay"></div>

Additionally, here is a link to see the mentioned setup in action. I want the green div (#d3) to remain visible on top of the overlay.

Is there a way to achieve this without applying position:absolute to #d3 or making changes to the DOM? My focus is on the latest version of Chrome and I am open to using Javascript/jQuery solutions if a pure CSS3 solution is not feasible.

javascriptjqueryhtmlcss

Answer №1

To ensure the z-index works, apply position: relative to the #d3 element.

#d3 {
    background: green;
    z-index: 9999999;
    position: relative;
}

Check out the demo: Fiddle

For more information, refer to this answer

Answer №2

Personally, I find that utilizing the outline property is a straightforward method to incorporate an overlay around any CSS element.

There's no need for z-index; simply insert the following code:

.myElement {
    outline: 99999px solid rgba(0, 0, 0, 0.5)
}

I've put together a demonstration on jsFiddle.

Wishing you a wonderful day, Thomas.

Answer №3

Here is the reason why this technique is effective: "The z-index property will only take effect if the position property is also specified."

For more information, visit this link and other related resources.

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