CSS Only Shimmer Button - Choose Your Products

css-only-shimmer-button-choose-your-products.markdown

CSS Only Shimmer Button - Choose Your Products

I was really inspired by an old button from Aaron which had a glowing edge, using an SVG effect. I wanted to see if I can create something similar with CSS only.

I really love this.

A Pen by Kevin Marville on CodePen.

License.

index.html

<header>
    <nav>
        <ul>
            <li><a href="#dashboard">Dashboard</a></li>
            <li><a href="#workout">Workout</a></li>
            <li><a href="#message">Message</a></li>
            <li><a href="#analytics">Analytics</a></li>
        </ul>
    </nav>
    <h1>Kvnbbg The Animator</h1>
</header>
<main id="app">
    <h2>Choose Your Products</h2>
    <div id="productSection">
        <select id="product">
            <option value="150">SmartPhone $150</option>
            <option value="750">Laptop $750</option>
            <option value="120">Headphones $120</option>
        </select>
        <label><input type="checkbox" id="insurance"> Add Insurance $10</label>
        <input type="number" id="quantity" min="1" placeholder="Quantity">
    </div>
    <p id="shipping">Shipping: </p>
    <button onclick="calculate()">
        <span class="text">Calculate Total and Shipping</span>
        <span class="shimmer"></span>
    </button>
</main>
<!-- 













    social icons
-->
<a class="social-icon codepen" href="https://codepen.io/simeydotme" title="view my codepens">
    Made by Kvnbbg
</a>
<a class="social-icon twitter" href="https://x.com/techandstream">
    <svg viewBox="0 0 24 24">
        <path stroke="none" d="M0 0h24v24H0z" fill="none"></path>
        <path d="M22 4.01c-1 .49 -1.98 .689 -3 .99c-1.121 -1.265 -2.783 -1.335 -4.38 -.737s-2.643 2.06 -2.62 3.737v1c-3.245 .083 -6.135 -1.395 -8 -4c0 0 -4.182 7.433 4 11c-1.872 1.247 -3.739 2.088 -6 2c3.308 1.803 6.913 2.423 10.034 1.517c3.58 -1.04 6.522 -3.723 7.651 -7.742a13.84 13.84 0 0 0 .497 -3.753c-.002 -.249 1.51 -2.772 1.818 -4.013z"></path>
    </svg>
</a>
<a class="social-icon github" href="https://github.com/kvnbbg">
    <svg viewBox="0 0 24 24">
        <path stroke="none" d="M0 0h24v24H0z" fill="none"></path>
        <path d="M9 19c-4.3 1.4 -4.3 -2.5 -6 -3m12 5v-3.5c0 -1 .1 -1.4 -.5 -2c2.8 -.3 5.5 -1.4 5.5 -6a4.6 4.6 0 0 0 -1.3 -3.2a4.2 4.2 0 0 0 -.1 -3.2s-1.1 -.3 -3.5 1.3a12.3 12.3 0 0 0 -6.2 0c-2.4 -1.6 -3.5 -1.3 -3.5 -1.3a4.2 4.2 0 0 0 -.1 3.2a4.6 4.6 0 0 0 -1.3 3.2c0 4.6 2.7 5.7 5.5 6c-.6 .6 -.6 1.2 -.5 2v3.5"></path>
    </svg>
</a>

script.js

// inspired by Aaron Iker & Shimmey
// https://codepen.io/aaroniker/pen/PoOvoaY
// and Adam Argyle
// https://codepen.io/argyleink/details/abPvZJo
// and Kvnbbg
// https://codepen.io/Kvnbbg-the-animator
// uses custom properties, so will only work in Chromium Browsers.

function calculate() {
    let product = document.getElementById("product").value;
    let insurance = document.getElementById("insurance").checked;
    let quantity = Number(document.getElementById("quantity").value);

    let total = product * quantity + (insurance && 10);

    let shipping = "";
    if (total > 400) {
        shipping = "Free";
    } else if (total > 100) {
        shipping = "Discounted";
    } else {
        shipping = "Standard";
    }
    let ship = document.getElementById("shipping");
    ship.textContent = ship.textContent + shipping;
}

style.css

@import url("https://fonts.googleapis.com/css2?family=Quicksand:wght@300&display=swap");

:root {
    --glow-hue: 222deg;
    --shadow-hue: 180deg;
    --spring-easing: linear(
        0,
        0.002,
        0.01 0.9%,
        0.038 1.8%,
        0.156,
        0.312 5.8%,
        0.789 11.1%,
        1.015 14.2%,
        1.096,
        1.157,
        1.199,
        1.224 20.3%,
        1.231,
        1.231,
        1.226,
        1.214 24.6%,
        1.176 26.9%,
        1.057 32.6%,
        1.007 35.5%,
        0.984,
        0.968,
        0.956,
        0.949 42%,
        0.946 44.1%,
        0.95 46.5%,
        0.998 57.2%,
        1.007,
        1.011 63.3%,
        1.012 68.3%,
        0.998 84%,
        1
    );
    --spring-duration: 1.33s;
}

@property --shimmer {
    syntax: "<angle>";
    inherits: false;
    initial-value: 33deg;
}

@keyframes shimmer {
    0% {
        --shimmer: 0deg;
    }
    100% {
        --shimmer: 360deg;
    }
}

@keyframes shine {
    0% {
        opacity: 0;
    }
    15% {
        opacity: 1;
    }
    55% {
        opacity: 1;
    }
    100% {
        opacity: 0;
    }
}

@keyframes text {
    0% {
        background-position: 100% center;
    }
    100% {
        background-position: -100% center;
    }
}

body,
html {
    display: flex;
    flex-direction: column;
    height: 100vh;
    margin: 0;
    padding: 0;
    background-image: radial-gradient(
        circle at 50% 0%,
        rgb(67, 54, 74) 16.4%,
        rgb(47, 48, 67) 68.2%,
        rgb(27, 23, 36) 99.1%
    );
    font-family: "Quicksand", sans-serif;
}

header {
    width: 100%;
    background: #f2f2f2;
    padding: 10px 0;
    text-align: center;
}

nav {
    margin-bottom: 10px;
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 20px;
}

nav ul li {
    display: inline;
}

nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: bold;
}

header h1 {
    font-size: 2em;
    margin: 0;
}

main#app {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

footer {
    background: #f2f2f2;
    padding: 10px 0;
    text-align: center;
}

footer p {
    margin: 0;
}

#productSection {
    background-color: #f2f2f2;
    padding: 20px;
    border-radius: 8px;
    display: inline-block;
    margin-bottom: 20px;
}

select,
input {
    margin: 10px 0;
    padding: 8px;
    border-radius: 4px;
    border: 1px solid #ddd;
}

button {
    color: var(--bg);
    font-weight: 600;
    background-image: linear-gradient(
        315deg,
        #ffc4ec -10%,
        #efdbfd 50%,
        #ffedd6 110%
    );
    padding: 0.8em 1.4em;
    position: relative;
    isolation: isolate;
    box-shadow: 0 2px 3px 1px hsl(var(--glow-hue) 50% 20% / 50%),
        inset 0 -10px 20px -10px hsla(var(--shadow-hue), 10%, 90%, 95%);
    border-radius: 0.66em;
    scale: 1;
    transition: all var(--spring-duration) var(--spring-easing);
}

button:hover:not(:active),
button.active {
    transition-duration: calc(var(--spring-duration) * 0.5);
    scale: 1.2;
    box-shadow: 0 4px 8px -2px hsl(var(--glow-hue) 50% 20% / 50%),
        inset 0 0 0 transparent;
}
button:active {
    scale: 1.1;
    transition-duration: calc(var(--spring-duration) * 0.5);
}

.shimmer {
    position: absolute;
    inset: -40px;
    border-radius: inherit;
    mask-image: conic-gradient(
        from var(--shimmer, 0deg),
        transparent 0%,
        transparent 10%,
        black 36%,
        black 45%,
        transparent 50%,
        transparent 60%,
        black 85%,
        black 95%,
        transparent 100%
    );
    mask-size: cover;
    mix-blend-mode: plus-lighter;
    animation: shimmer 1s linear infinite both;
}

button:hover .shimmer::before,
button:hover .shimmer::after,
button.active .shimmer::before,
button.active .shimmer::after {
    opacity: 1;
    animation: shine 1.2s ease-in 1 forwards;
}

.shimmer::before,
.shimmer::after {
    transition: all 0.5s ease;
    opacity: 0;
    content: "";
    border-radius: inherit;
    position: absolute;
    mix-blend-mode: color;
    inset: 40px;
    pointer-events: none;
}

.shimmer::before {
    box-shadow: 0 0 3px 2px hsl(var(--glow-hue) 20% 95%),
        0 0 7px 4px hsl(var(--glow-hue) 20% 80%),
        0 0 13px 4px hsl(var(--glow-hue) 50% 70%),
        0 0 25px 5px hsl(var(--glow-hue) 100% 70%);
    z-index: -1;
}

.shimmer::after {
    box-shadow: inset 0 0 0 1px hsl(var(--glow-hue) 70% 95%),
        inset 0 0 2px 1px hsl(var(--glow-hue) 100% 80%),
        inset 0 0 5px 2px hsl(var(--glow-hue) 100% 70%);
    z-index: 2;
}

button .text {
    color: transparent;
    background-clip: text;
    background-color: var(--bg);
    background-image: linear-gradient(
        120deg,
        transparent,
        hsla(var(--glow-hue), 100%, 80%, 0.66) 40%,
        hsla(var(--glow-hue), 100%, 90%, 0.9) 50%,
        transparent 52%
    );
    background-repeat: no-repeat;
    background-size: 300% 300%;
    background-position: center 200%;
}

button:hover .text,
button.active .text {
    animation: text 0.66s ease-in 1 both;
}

styles

<link href="https://codepen.io/simeydotme/pen/WNawZXp/be618208e9e17abe52c0fc63379e5f88.css" rel="stylesheet" />