AI CSS Animations

Checklist with Progress Bar

A setup checklist whose bar fills a third per ticked item and whose counter reads 2 / 3 done. The bar uses :has() to count checked boxes and the counter is a plain CSS counter, no script.

Also known as: checkbox progress bar css, onboarding checklist css, css has checklist.

Getting started

HTML

<div class="chk-checklist-progress-bar">
  <label class="chk-checklist-progress-bar-item">
    <input type="checkbox" checked>
    <span class="chk-checklist-progress-bar-box"><svg viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12.5l4.5 4.5L19 7.5"/></svg></span>
    <span class="chk-checklist-progress-bar-text">Create account</span>
  </label>
  <label class="chk-checklist-progress-bar-item">
    <input type="checkbox">
    <span class="chk-checklist-progress-bar-box"><svg viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12.5l4.5 4.5L19 7.5"/></svg></span>
    <span class="chk-checklist-progress-bar-text">Invite your team</span>
  </label>
  <label class="chk-checklist-progress-bar-item">
    <input type="checkbox">
    <span class="chk-checklist-progress-bar-box"><svg viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12.5l4.5 4.5L19 7.5"/></svg></span>
    <span class="chk-checklist-progress-bar-text">Publish a page</span>
  </label>
  <div class="chk-checklist-progress-bar-head">
    <span class="chk-checklist-progress-bar-title">Getting started</span>
    <span class="chk-checklist-progress-bar-count"></span>
  </div>
  <div class="chk-checklist-progress-bar-track"><span class="chk-checklist-progress-bar-fill"></span></div>
</div>

CSS

.chk-checklist-progress-bar {
  --c: var(--chk-color, #3b82f6);
  font-size: var(--chk-size, 24px);
  --p: 0;
  display: flex;
  flex-direction: column;
  gap: 0.3em;
  width: 12em;
  line-height: 1.3;
  counter-reset: chk-checklist-progress-bar-done;}
.chk-checklist-progress-bar-head {
  order: -2;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.8em;
}
.chk-checklist-progress-bar-title {
  font-weight: 600;
}
.chk-checklist-progress-bar-count {
  opacity: 0.65;
  font-variant-numeric: tabular-nums;
  transition: color 0.3s ease, opacity 0.3s ease;
}
.chk-checklist-progress-bar-count::before {
  content: counter(chk-checklist-progress-bar-done) " / 3 done";
}
.chk-checklist-progress-bar-track {
  order: -1;
  height: 0.32em;
  margin-bottom: 0.4em;
  border-radius: 1em;
  background: color-mix(in srgb, var(--c) 18%, transparent);
  overflow: hidden;
}
.chk-checklist-progress-bar-fill {
  position: relative;
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--c);
  transform: scaleX(var(--p));
  transform-origin: left;
  transition: transform 0.5s cubic-bezier(0.65, 0, 0.35, 1);
  overflow: hidden;
}
.chk-checklist-progress-bar-fill::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgb(255 255 255 / 0.7), transparent);
  transform: translateX(-100%);
}
.chk-checklist-progress-bar-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.12em 0;
  font-size: 0.85em;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
}
.chk-checklist-progress-bar-item input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
  z-index: 1;
}
.chk-checklist-progress-bar-item input:checked {
  counter-increment: chk-checklist-progress-bar-done;
}
.chk-checklist-progress-bar-box {
  display: grid;
  place-items: center;
  flex: none;
  width: 1.1em;
  height: 1.1em;
  border: 0.12em solid color-mix(in srgb, currentColor 38%, transparent);
  border-radius: 0.3em;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}
.chk-checklist-progress-bar-box svg {
  width: 0.8em;
  height: 0.8em;
  fill: none;
  stroke: #fff;
  stroke-width: 3.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 20;
  stroke-dashoffset: 20;
  transition: stroke-dashoffset 0.2s ease-in;
}
.chk-checklist-progress-bar-text {
  transition: opacity 0.3s ease;
}
.chk-checklist-progress-bar-item input:checked + .chk-checklist-progress-bar-box {
  background: var(--c);
  border-color: var(--c);
}
.chk-checklist-progress-bar-item input:checked + .chk-checklist-progress-bar-box svg {
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 0.3s ease-out 0.05s;
}
.chk-checklist-progress-bar-item input:checked ~ .chk-checklist-progress-bar-text {
  opacity: 0.5;
}
.chk-checklist-progress-bar-item input:focus-visible + .chk-checklist-progress-bar-box {
  outline: 0.12em solid var(--c);
  outline-offset: 0.18em;
}
.chk-checklist-progress-bar:has(.chk-checklist-progress-bar-item input:checked) {
  --p: 0.3333;
}
.chk-checklist-progress-bar:has(.chk-checklist-progress-bar-item:nth-of-type(1) input:checked):has(.chk-checklist-progress-bar-item:nth-of-type(2) input:checked),
.chk-checklist-progress-bar:has(.chk-checklist-progress-bar-item:nth-of-type(1) input:checked):has(.chk-checklist-progress-bar-item:nth-of-type(3) input:checked),
.chk-checklist-progress-bar:has(.chk-checklist-progress-bar-item:nth-of-type(2) input:checked):has(.chk-checklist-progress-bar-item:nth-of-type(3) input:checked) {
  --p: 0.6667;
}
.chk-checklist-progress-bar:has(.chk-checklist-progress-bar-item:nth-of-type(1) input:checked):has(.chk-checklist-progress-bar-item:nth-of-type(2) input:checked):has(.chk-checklist-progress-bar-item:nth-of-type(3) input:checked) {
  --p: 1;
}
.chk-checklist-progress-bar:has(.chk-checklist-progress-bar-item:nth-of-type(1) input:checked):has(.chk-checklist-progress-bar-item:nth-of-type(2) input:checked):has(.chk-checklist-progress-bar-item:nth-of-type(3) input:checked) .chk-checklist-progress-bar-count {
  color: var(--c);
  opacity: 1;
}
.chk-checklist-progress-bar:has(.chk-checklist-progress-bar-item:nth-of-type(1) input:checked):has(.chk-checklist-progress-bar-item:nth-of-type(2) input:checked):has(.chk-checklist-progress-bar-item:nth-of-type(3) input:checked) .chk-checklist-progress-bar-fill::after {
  animation: chk-checklist-progress-bar-shine 0.9s ease-in-out 0.45s;
}
@keyframes chk-checklist-progress-bar-shine {
  to { transform: translateX(100%); }
}

@media (prefers-reduced-motion: reduce) {
  .chk-checklist-progress-bar, .chk-checklist-progress-bar *, .chk-checklist-progress-bar::before, .chk-checklist-progress-bar::after, .chk-checklist-progress-bar *::before, .chk-checklist-progress-bar *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

Customizing this snippet

  • Color: set --chk-color on the element or a parent. Currently previewing #3b82f6.
  • Size: set --chk-size. Every other dimension is in em, so the whole thing scales together. Currently previewing 24px.
  • Speed: change the duration on the transition or animation shorthand. Staggered delays are relative, so they keep their rhythm.
  • Reduced motion: the rule at the end of the CSS turns the motion off for people who asked their OS for less of it. Keep it.

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