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<title>Better Box Shadows</title>
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<h1 id="better-box-shadows">Better Box Shadows</h1>
-
<p>2019-01-08</p>
-
<p>Box shadow on HTML elements has been widely supported across most browsers for a while now, but I find the default options don&#8217;t allow for much visual manipulation of the shadows in general.</p>
-
<p>Let&#8217;s take a look at a default configuration of <code>box-shadow</code>:</p>
-
<pre><code>.box-container {
box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}
</code></pre>
-
<p>In the example above the first property number is the origin of the <em>x-axis</em>, the second number is the origin of the <em>y-axis</em> and the third is the amount of <em>blur</em>.</p>
-
<p>We should also add some minimal styling to cleanup the <code>.box-container</code> a little bit for our example:</p>
-
<pre><code>&#60;div class="box-container"&#62;&#60;&#47;div&#62;
@@ -47,24 +41,16 @@
width: 250px;
}
</code></pre>
-
<p>Which would render as this:</p>
-
<p>Not bad - but we can do a lot better than this.</p>
-
<h2 id="please-sir-i-want-some-more-depth">Please sir, I want some more (depth)</h2>
-
<p>We just need to add a simple child <code>div</code> (or use a <code>pseudo</code> element if you prefer) inside our main element we want to apply the shadow to:</p>
-
<pre><code>&#60;div class="box-container"&#62;
&#60;div class="box-container-inner"&#62;&#60;&#47;div&#62;
&#60;&#47;div&#62;
</code></pre>
-
<p>Now we make our inner child element <code>absolute</code> and set it&#8217;s <code>height</code> and <code>width</code> dynamically to be slightly smaller than it&#8217;s parent (percentages work best for this). </p>
-
<p>Remember to set this child element behind it&#8217;s parent by adding <code>z-index: -1</code>.</p>
-
<pre><code>.box-container {
&#47;* No box-shadow needed on this element anymore *&#47;
&#47;* Styles to make it less ugly *&#47;
@@ -77,11 +63,8 @@
width: 250px;
}
</code></pre>
-
<h2 id="inner-containers">Inner Containers</h2>
-
<p>We also need to target the <code>box-container-inner</code> element set inside the current parent to reflect our custom shadow styling:</p>
-
<pre><code>.box-container-inner {
bottom: 0;
&#47;* The box-shadow is added here now *&#47;
@@ -93,15 +76,10 @@
z-index: -1;
}
</code></pre>
-
<p>Which will make the drop-shadow render with a little more realistic depth:</p>
-
<h2 id="but-wait---theres-more">But wait - there&#8217;s more!</h2>
-
<p>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 - <code>filter:blur();</code>. </p>
-
<p>So your final code would look like this:</p>
-
<pre><code>.box-container {
&#47;* Styles to make it less ugly *&#47;
background: white;
@@ -124,7 +102,6 @@
z-index: -1;
}
</code></pre>
-
<p>Which renders out into a much smoother blend of a drop-shadow, creating a more realistic illusion of depth:</p>
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