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authorBradley Taunt <bt@btxx.org>2024-07-02 14:28:49 -0400
committerBradley Taunt <bt@btxx.org>2024-07-02 14:28:49 -0400
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----
-layout: post
-title: "Better Box Shadows"
-date: 2019-01-08
----
-
-
-Box shadow on <abbr title="hypertext markup language">HTML</abbr> elements has been widely supported across most browsers for a while now, but I find the default options don't allow for much visual manipulation of the shadows in general.
-
-Let's take a look at a default configuration of `box-shadow`:
-
-
- .box-container {
- box-shadow: 0 4px 8px rgba(0,0,0,0.3);
- }
-
-
-In the example above the first property number is the origin of the *x-axis*, the second number is the origin of the *y-axis* and the third is the amount of *blur*.
-
-We should also add some minimal styling to cleanup the `.box-container` a little bit for our example:
-
-
- <div class="box-container"></div>
-
-
- .box-container {
- box-shadow: 0 4px 8px rgba(0,0,0,0.3);
- /* Styles to make it less ugly */
- background: white;
- border-radius: 10px;
- border: 1px solid #eee;
- height: 200px;
- padding: 10px;
- position: relative;
- width: 250px;
- }
-
-
-Not bad - but we can do a lot better than this.
-
-## Please sir, I want some more (depth)
-
-We just need to add a simple child `div` (or use a `pseudo` element if you prefer) inside our main element we want to apply the shadow to:
-
-
- <div class="box-container">
- <div class="box-container-inner"></div>
- </div>
-
-
-Now we make our inner child element `absolute` and set it's `height` and `width` dynamically to be slightly smaller than it's parent (percentages work best for this).
-
-Remember to set this child element behind it's parent by adding `z-index: -1`.
-
-
- .box-container {
- /* No box-shadow needed on this element anymore */
- /* Styles to make it less ugly */
- background: white;
- border-radius: 10px;
- border: 1px solid #eee;
- height: 200px;
- padding: 10px;
- position: relative;
- width: 250px;
- }
-
-
-## Inner Containers
-
-We also need to target the `box-container-inner` element set inside the current parent to reflect our custom shadow styling:
-
-
- .box-container-inner {
- bottom: 0;
- /* The box-shadow is added here now */
- box-shadow: 0 4px 12px rgba(0,0,0,0.3);
- height: 94%;
- left: 3%;
- position: absolute;
- width: 94%;
- z-index: -1;
- }
-
-
-Which will make the drop-shadow render with a little more realistic depth.
-
-
-## But wait - there's more!
-
-We could stop now and have a decent drop-shadow that is certainly easier on the eyes - but we can make this even better with one extra property - `filter:blur();`.
-
-So your final code would look like this:
-
-
- .box-container {
- /* Styles to make it less ugly */
- background: white;
- border-radius: 10px;
- border: 1px solid #eee;
- height: 200px;
- padding: 10px;
- position: relative;
- width: 250px;
- }
-
- .box-container-inner {
- bottom: 0;
- box-shadow: 0 4px 12px rgba(0,0,0,0.3);
- filter: blur(6px);
- height: 94%;
- left: 3%;
- position: absolute;
- width: 94%;
- z-index: -1;
- }
-
-
-Which renders out into a much smoother blend of a drop-shadow, creating a more realistic illusion of depth.
-
-
-Take a look at all the examples in the [CodePen examples](https://codepen.io/bradleytaunt/pen/dyNbZNj)
-
-