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<h1>Shiny, Animated CSS Buttons</h1>
<p>2021-04-27</p>
<p>Everyone can appreciate fancy, animated buttons - but often times they come with a performance cost: <em>JavaScript</em>. Luckily for us, we can create our very own shiny, animated buttons with pure CSS.</p>
<h2>The Demo</h2>
<p><img src="/public/images/shiny-buttons.png" alt="Four buttons that shine when hovered" /></p>
<p><a href="https://codepen.io/bradleytaunt/pen/oNBQevj">Live CodePen Example</a></p>
<h2>The HTML</h2>
<p>Nothing fancy going on here, just a set of <code>ahref</code> elements with specific <code>button</code> classes added:</p>
<pre><code><a href="#" class="button green"><span>Green Button</span></a>
<a href="#" class="button blue"><span>Blue Button</span></a>
<a href="#" class="button orange"><span>Orange Button</span></a>
<a href="#" class="button purple"><span>Purple Button</span></a>
</code></pre>
<h2>The CSS</h2>
<p>First we set the default base styling for all the buttons. We also place the inner text into <code>span</code> elements (I will explain why in a little bit):</p>
<pre><code>.button {
background: white;
border: 1px solid #a5b1c2;
border-radius: 6px;
box-shadow: 0 4px 8px rgba(0,0,0,0.1);
color: #111111;
display: inline-block;
margin: 1rem auto;
min-width: 180px;
overflow: hidden;
padding: 15px 30px;
position: relative;
text-align: center;
text-decoration: none;
transition: .3s ease-in-out all;
}
.button span {
position: relative;
z-index: 2;
}
</code></pre>
<p>Now we need to create our <em>shiny</em> element that will pass across the button on <code>hover</code> or <code>focus</code>. For this object we will use the <code>before</code> pseudo element:</p>
<pre><code>.button:before {
background: linear-gradient(transparent 0%, rgba(255,255,255,0.6) 50%, transparent 100%);
content:'';
height: 200%;
position: absolute;
right: calc(100% + 20px);
top: -55%;
transform: rotate(-70deg);
transition: .6s ease-in-out right;
width: 80px;
z-index: 0;
}
</code></pre>
<p>Next, we tell the <code>before</code> element to swipe across the main <code>.button</code> parent element when the user hovers or focuses on it. Remember placing our inner content into a <code>span</code> element? That insures that our shiny/swipe element doesn't position itself <em>over</em> the text, but instead flows under it:</p>
<pre><code>.button:hover:before {
right: -100%;
}
/* Extra visual styling for buttons on hover - optional */
.button:hover, button:focus {
box-shadow: 0 8px 12px rgba(0,0,0,0.1), inset 0 10px 30px rgba(255,255,255,0.3), inset 0 2px 2px rgba(255,255,255,0.2);
color: white;
}
</code></pre>
<p>All that's left is adding some visual flare to each individual button - in this case background-color and border-color:</p>
<pre><code>.button.green:hover, button.green:focus { background: #20bf6b; border-color: #20bf6b; }
.button.blue:hover, button.blue:focus { background: #0984e3; border-color: #0984e3; }
.button.orange:hover, button.orange:focus { background: #ff793f; border-color: #ff793f; }
.button.purple:hover, button.purple:focus { background: #6c5ce7; border-color: #6c5ce7; }
</code></pre>
<h2>Browser Support</h2>
<p>These buttons work across all browsers flawlessly. See the details <a href="https://caniuse.com/css-gencontent">on the caniuse report itself</a>.</p>
<h2>The Live CodePen</h2>
<p>You can find the live demo embedded at the top of this post, or <a href="https://codepen.io/bradleytaunt/pen/oNBQevj">directly on CodePen here</a>.</p>
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