仓库源文，站点原文

layout: "../layouts/BlogPost.astro" title: "CSS effects collection" slug: css-effects-collection description: "" added: "Dec 5 2022" tags: [css]

updatedDate: "Sep 24 2024"

Rainbow Artword

<style>
  .wordart {
    display: inline-block;
    background: linear-gradient(
      90deg,
      #ff0000,
      #ff8800,
      #ffff00,
      #02be02,
      #0000ff,
      #4f00ff,
      #9c00ff
    );
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    font-size: 60px;
    font-weight: bold;
    transform: skewY(-8deg) scaleY(1.3) scaleX(0.8);
    filter: drop-shadow(2px 2px 0px rgba(0, 0, 0, 0.2));
  }
</style>

<span class="wordart">WordArt</span>

Using the background-clip property we can control where the background shows. Specifically, we can set background-clip: text to make the background only show wherever there's text in the element.
drop-shadow is similar to the box-shadow property. The box-shadow property creates a rectangular shadow behind an element's entire box, while the drop-shadow creates a shadow that conforms to the shape (alpha channel) of the image itself.
A cool website: https://www.makewordart.com

Hover Text Effects

https://codepen.io/jh3y/pen/abGPKGO

<script src="https://unpkg.com/splitting/dist/splitting.min.js"></script>
<style>
  .char {
    --pop: 0;
    display: inline-block;
    position: relative;
    color: transparent;
    z-index: calc(1 + (var(--pop) * 2));
  }

  .char:after {
    content: attr(data-char);
    position: absolute;
    inset: 0;
    color: hsl(45 calc(var(--pop) * 100%) calc(80% - (30% * var(--pop))));
    translate: 0 calc(var(--pop, 0) * -65%);
    scale: calc(1 + var(--pop) * 0.75);
    transition: translate 0.2s, scale 0.2s, color 0.2s;
  }

  .char:hover {
    --pop: 1;
  }

  /* elements that are immediately before and after the char being hovered */
  .char:hover + .char,
  .char:has(+ .char:hover) {
    --pop: 0.4;
  }
</style>

<h1 data-splitting>Happy Birthday!</h1>
<script> Splitting(); </script>

Splitting.js is designed to split an element in a variety of ways, such as words, characters, child nodes, and more.
The inset CSS property is a shorthand that corresponds to the top, right, bottom and left properties.
:has(+ .char:hover) means target any character that is directly followed by a character that is hovered. It is available in Chrome 105.

Apple-style OS dock

CSS only, no JS. This one would be pretty sweet as a nav on your portfolio.

https://codepen.io/jh3y/pen/GRwwWoV

.b:has(+ .b:hover),
.b:hover + .b {
  flex: calc(0.2 + (sin(30deg) * 1.5));
  translate: 0 calc(sin(30deg) * -75%);
}

3D Flip Hover Effects

https://codepen.io/rikanutyy/pen/PEJBxX

<style>
  .card {
    color: #013243;
    position: absolute;
    top: 50%;
    left: 50%;
    width: 300px;
    height: 400px;
    background: #e0e1dc;
    transform-style: preserve-3d;
    transform: translate(-50%,-50%) perspective(2000px);
    box-shadow: inset 300px 0 50px rgba(0,0,0,.5), 20px 0 60px rgba(0,0,0,.5);
    transition: 1s;
  }

  .card:hover {
    transform: translate(-50%,-50%) perspective(2000px) rotate(15deg) scale(1.2);
    box-shadow: inset 20px 0 50px rgba(0,0,0,.5), 0 10px 100px rgba(0,0,0,.5);
  }

  .card:before {
    content:'';
    position: absolute;
    top: -5px;
    left: 0;
    width: 100%;
    height: 5px;
    background: #BAC1BA;
    transform-origin: bottom;
    transform: skewX(-45deg);
  }

  .card:after {
    content: '';
    position: absolute;
    top: 0;
    right: -5px;
    width: 5px;
    height: 100%;
    background: #92A29C;
    transform-origin: left;
    transform: skewY(-45deg);
  }

  .card .imgBox {
    width: 100%;
    height: 100%;
    position: relative;
    transform-origin: left;
    transition: .7s;
  }

  .card .bark {
    position: absolute;
    background: #e0e1dc;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: .7s;
  }

  .card .imgBox img {
    min-width: 250px;
    max-height: 400px;
  }

  .card:hover .imgBox {
    transform: rotateY(-135deg);
  }

  .card:hover .bark {
    opacity: 1;
    transition: .6s;
    box-shadow: 300px 200px 100px rgba(0, 0, 0, .4) inset;
  }

  .card .details {
    position: absolute;
    top: 0;
    left: 0;
    box-sizing: border-box;
    padding: 0 0 0 20px;
    z-index: -1;
    margin-top: 70px;
  }
</style>

<div class="card">
  <div class="imgBox">
    <div class="bark"></div>
    <img src="https://placekitten.com/300/400">
  </div>
  <div class="details">
    <h4>HAPPY BIRTHDAY</h4>
  </div>
</div>

Color Palettes

Build a wide gamut color palette with okLCH and inspects color with devtools: https://www.youtube.com/watch?v=6aCsAMgwnjE
Create a custom palette: https://www.radix-ui.com/colors/custom

<style>
  html {
    --hue: 140;

    --swatch-1: oklch(99% .05 var(--hue));
    --swatch-2: oklch(90% .1 var(--hue));
    --swatch-3: oklch(80% .2 var(--hue));
    --swatch-4: oklch(72% .25 var(--hue));
    --swatch-5: oklch(67% .31 var(--hue));
    --swatch-6: oklch(50% .27 var(--hue));
    --swatch-7: oklch(35% .25 var(--hue));
    --swatch-8: oklch(25% .2 var(--hue));
    --swatch-9: oklch(13% .2 var(--hue));
    --swatch-10: oklch(5% .1 var(--hue));

    --text-1: var(--swatch-10);
    --text-2: var(--swatch-9);
    --surface-1: var(--swatch-1);
    --surface-2: var(--swatch-2);
    --surface-3: var(--swatch-3);
  }

  html {
    background: var(--surface-1);
    color: var(--text-1);
  }
  body {
    display: grid;
    /* justify-content && align-content */
    place-content: center;
    gap: 5vmin;
    grid-auto-flow: column;
  }
  .palette {
    display: grid;
    grid-auto-rows: 8vh;
    grid-template-columns: 20vw;
  }
  .swatch {
    box-shadow: inset 0 0 0 1px oklch(50% 0 0 / 20%);
  }
  .swatch:nth-of-type(1)  { background: var(--swatch-1) }
  .swatch:nth-of-type(2)  { background: var(--swatch-2) }
  .swatch:nth-of-type(3)  { background: var(--swatch-3) }
  .swatch:nth-of-type(4)  { background: var(--swatch-4) }
  .swatch:nth-of-type(5)  { background: var(--swatch-5) }
  .swatch:nth-of-type(6)  { background: var(--swatch-6) }
  .swatch:nth-of-type(7)  { background: var(--swatch-7) }
  .swatch:nth-of-type(8)  { background: var(--swatch-8) }
  .swatch:nth-of-type(9)  { background: var(--swatch-9) }
  .swatch:nth-of-type(10) { background: var(--swatch-10) }

  .card {
    display: grid;
    border-radius: 10px;
    background: var(--surface-2);
    border: 1px solid var(--surface-3);
    padding: 1rem;
  }
</style>

<body>
  <div class="palette">
    <div class="swatch"></div>
    <div class="swatch"></div>
    <div class="swatch"></div>
    <div class="swatch"></div>
    <div class="swatch"></div>
    <div class="swatch"></div>
    <div class="swatch"></div>
    <div class="swatch"></div>
    <div class="swatch"></div>
    <div class="swatch"></div>
  </div>

  <article>
    <div class="card">
      <h2>I'm a card</h2>
      <p>Lorem ipsum dolor, sit amet consectetur adipisicing elit. Itaque doloremque modi veniam aspernatur voluptatum
        labore dolores perspiciatis.</p>
    </div>
  </article>
</body>

Another way is using CSS color-mix(), which is stable in Chrome 111. The trick for creating semi-opaque versions of the brand colors is mixing them with the transparent color value.

:root {
  --brandBlue: skyblue;
  --brandBlue-a10: color-mix(in srgb, var(--brandBlue), transparent 90%);
  --brandBlue-a20: color-mix(in srgb, var(--brandBlue), transparent 80%);
  --brandBlue-a30: color-mix(in srgb, var(--brandBlue), transparent 70%);
  --brandBlue-a40: color-mix(in srgb, var(--brandBlue), transparent 60%);
  --brandBlue-a50: color-mix(in srgb, var(--brandBlue), transparent 50%);
  --brandBlue-a60: color-mix(in srgb, var(--brandBlue), transparent 40%);
  --brandBlue-a70: color-mix(in srgb, var(--brandBlue), transparent 30%);
  --brandBlue-a80: color-mix(in srgb, var(--brandBlue), transparent 20%);
  --brandBlue-a90: color-mix(in srgb, var(--brandBlue), transparent 10%);
}

3D Clock

https://codepen.io/bigxixi/pen/abjEMbg

Blurry image load

<style>
.blurry-load {
  filter: blur(8px);
}

@keyframes blurOut {
  0% {
    filter: blur(20px);
  }
  50% {
    filter: blur(10px);
  }
  100% {
    filter: blur(0px);
  }
}
.blur-out {
  animation: blurOut 0.5s ease-out forwards;
}
</style>

<img
  class="blurry-load"
  src="image-small.jpg"
  data-large="image.jpg"
/>

<script>
document.addEventListener('DOMContentLoaded', () => {
  const images = document.querySelectorAll('.blurry-load');

  images.forEach(img => {
    const fullImage = new Image();

    fullImage.onload = () => {
      img.src = fullImage.src;
      img.classList.add('blur-out');
      img.classList.remove('blurry-load');
    };

    fullImage.src = img.getAttribute('data-large');
  });
});
</script>

Animation with View Transitions

Getting started with View Transitions on multi-page apps: https://daverupert.com/2023/05/getting-started-view-transitions
A collection of example view transitions for multi-page sites: https://mpa-view-transitions-sandbox.netlify.app
Adam Argyle at SeattleJS Conf: https://seattlejs-view-transitions.netlify.app
Same-Document View Transitions for SPA: https://developer.chrome.com/docs/web-platform/view-transitions/same-document
Cross-Document View Transitions for MPA: https://developer.chrome.com/docs/web-platform/view-transitions/cross-document

When a view transition occurs between two different documents it is called a cross-document view transition. This is typically the case in multi-page applications (MPA). Chrome 126 enables Cross-Document View Transitions triggered by a same-origin navigation. From now on, you no longer need rearchitect your app to an SPA to use View Transitions.

<style>
  body {
    display: grid;
    place-content: center;
  } 
  .box {
    /* Having a name means "hold onto this element and try to tween it" (otherwise you get the cross-fade) */
    view-transition-name: box; /* whatever a unique name */
    width: 100px;
    height: 100px;
    background: blue;
  }
</style>

<div class="box"></div>
<script>
  // https://codepen.io/argyleink/pen/NWOEvro
  const positions = ['start', 'end', 'center']

  function getRandomInt(max) {
    return Math.floor(Math.random() * max);
  }

  function setRandomAlignments() {
    document.body.style.alignContent = positions[getRandomInt(3)]
    document.body.style.justifyContent = positions[getRandomInt(3)]
  }

  document.body.addEventListener('click', e => {
    if (!document.startViewTransition)
      setRandomAlignments()
    else
      document.startViewTransition(() => {
        setRandomAlignments()
      })
  })
</script>

https://codepen.io/argyleink/pen/GRPRJyM

Filter and backdrop filter

backdrop-filter has the same effect as filter, with one notable difference — backdrop filters apply only to areas behind the element instead of to the element and its children. Filters, on the other hand, apply directly to the element and its children, and don’t affect anything behind the element.

<figure> <img alt="filter" src="https://raw.gitmirror.com/kexiZeroing/blog-images/main/a9f0c5e0-6f17-4068-b481-17bfac204791.png" width="500"> <figcaption>filter example</figcaption> </figure><figure> <img alt="backdrop-filter" src="https://raw.gitmirror.com/kexiZeroing/blog-images/main/t0635k.png" width="500"> <figcaption>backdrop-filter example</figcaption> </figure>

<div class="parent">
  <div class="blur">Blur</div>
  <div class="invert">Invert</div>
  <div class="hue">Hue</div>
  <div class="grayscale">Grayscale</div>
</div>
<style>
.parent {
  background-image: url("/images/neue-donau.webp");
}
.blur {
  backdrop-filter: blur(5px);
}
.invert {
  backdrop-filter: invert(1);
}
.hue {
  backdrop-filter: hue-rotate(260deg);
}
.grayscale {
  backdrop-filter: grayscale(100%);
}
</style>

Scroll-driven animations

At its simplest, the animation-timeline property lets us link any keyframe animation to the progress of scroll. They still run from 0-100%. But now, 0% is the scroll start position and 100% is the scroll end position.

@keyframes spin {
  to {
    transform: rotateY(5turn);
  }
}

@media (prefers-reduced-motion: no-preference) {
  @supports (animation-timeline: scroll()) {
    div {
      animation: spin linear both;
      animation-timeline: scroll();
    } 
  }
}

Next, change scroll() to view(), which means we can trigger animations when elements enter and exit the viewport. This time 0% is when the element is entering the scroll area and 100% is when it’s about to go out of that scroll area.

/* Animate images: https://codepen.io/una/pen/KKYZzJM */
@keyframes appear {
  from { opacity: 0; scale: 0.8; }
  to { opacity: 1; scale: 1; }
}

img {
  animation: appear linear both;
  animation-timeline: view();
  animation-range: entry 25% cover 50%;
}

Because scroll-driven animations are only active when there is scrollable overflow, it is possible to use them as a mechanism to detect if an element can scroll or not.

.container {
  height: 250px;
  width: 250px;
  overflow-y: auto;

  --can-scroll: 0;
  animation: detect-scroll;
  animation-timeline: scroll(self);
}

@keyframes detect-scroll {
  from, to  {
    --can-scroll: 1;
  }
}

"Unleash the Power of Scroll-Driven Animations" from Google is a 10-part video course to learn all about scroll-driven animations.

Reveal hover effect

https://codepen.io/t_afif/pen/GRYEZrr

<img src="https://picsum.photos/seed/picsum/200/200" class="left">
<img src="https://picsum.photos/seed/picsum/200/200" class="right">

<style>
img {
  --s: 200px; /* the image size */

  width: var(--s);
  height: var(--s);
  box-sizing: border-box;
  object-fit: cover;
  transition: .5s;
}
img.left {
  object-position: right;
  padding-left: var(--s);
  background: #542437;
}
img.right {
  object-position: left;
  padding-right: var(--s);
  background: #8A9B0F;
}

img:hover {
  padding: 0;
}
</style>

object-fit property is used to specify how an <img> should be resized to fit its container. fill is default, which means the image is resized to fill the given dimension.
object-position is used together with object-fit to specify how an <img> should be positioned with x/y coordinates inside its "own content box".
box-sizing: border-box will make the size of the content box equal to 0. In other words, we don’t see the image, but we see the background color since it covers the padding area.

Rotating highlight effect

It creates an animated button with a rotating highlight effect around its border. Conic gradients are employed to generate the rotating highlight and the @property rule defines a custom property for rotation.

https://codepen.io/wesbos/pen/PoraMVV

<button>
  <div class="fancy"></div>
  <span class="text">Download For Free</span>
</button>

<style>
  @property --rotate {
    syntax: "<angle>";
    initial-value: 0deg;
    inherits: false;
  }

  button {
    --blue: #0173ff;
    --radius: 50px;
    --rotate: 0deg;
    border-radius: var(--radius);
    background: var(--blue);
    color: white;
    border: 0;
    position: relative;

    .fancy {
      position: absolute;
      inset: 0;
      &:before {
        content: "";
        background: conic-gradient(
          from var(--rotate),
          transparent 0%,
          white 5%,
          transparent 10%
        );
        position: absolute;
        inset: 0;
        animation: rotate 1s linear infinite;
      }
      &:after {
        content: "";
        background: var(--blue);
        position: absolute;
        inset: 2px;
        border-radius: calc(var(--radius) - 2px);
      }
    }
    .text {
      position: relative;
    }
  }
  @keyframes rotate {
    to {
      --rotate: 360deg;
    }
  }
</style>

Glass folder effect

<div class="folder">
  <img src="https://picsum.photos/seed/picsum/200/200" />
</div>

<style>
  img {
    border-radius: 10px;
    box-shadow: 0 2px 15px #333;
    transition: all 0.2s;
    margin-top: -30%;
  }
  .folder {
    display: inline-block;
    background: #007eaf;
    transition: all 0.2s;
    box-shadow: 0 2px 15px #333;
    padding: 30px;
    border-radius: 10px;
    position: relative;
    margin-top: 30%;
  }
  .folder:hover img {
    translate: 0 -50px;
  }
  .folder::after {
    box-shadow: 0 2px 5px #3334 inset;
    border-bottom-left-radius: inherit;
    border-bottom-right-radius: inherit;      
    content: '';
    position: absolute;
    background: #019eda44;
    inset: 20% 0 0;
    backdrop-filter: blur(8px);
  }
</style>

The Periodic Table

https://dev.to/madsstoumann/the-periodic-table-in-css-3lmm

ol {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(18, 1fr);
  grid-template-rows: repeat(10, 1fr);
}
li {
  &:nth-of-type(2) { grid-column: 18; } /* pushed to the last column */
}

/* filter */
body:has(#alk:checked) li:not(.alk) { 
  opacity: 0.2;
}

Selection menu

https://codepen.io/chriscoyier/pen/eYBQamQ

<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit...</p>
<template><span id="control"></span></template>

<script>
  let control = document.importNode(document.querySelector('template').content, true).childNodes[0];
  control.addEventListener('pointerdown', oncontroldown, false);

  document.querySelector('p').onpointerup = () => {
    let selection = document.getSelection(), text = selection.toString();
    if (text !== "") {
      let rect = selection.getRangeAt(0).getBoundingClientRect();
      control.style.top = `calc(${rect.top}px - 48px)`;
      control.style.left = `calc(${rect.left}px + calc(${rect.width}px / 2) - 40px)`;
      document.body.appendChild(control);
    }
  }
  document.onpointerdown = () => {  
    let control = document.querySelector('#control');
    if (control !== null) {
      control.remove();
      document.getSelection().removeAllRanges();
    }
  }
</script>