AI CSS Animations

Diff Hunk Review

A diff for src/server/limiter.ts in three hunks, each with its own Reject and Accept. Focus lands on Accept, it presses, the hunk tints green as Accepted swaps in and the count climbs to 3 of 3.

Also known as: accept reject diff hunks, review ai code changes, per hunk accept ui.

src/server/limiter.ts
@@ -4,1 +4,1 @@Accepted

const LIMIT = 10;

const LIMIT = Number(env.LOGIN_LIMIT ?? 5);

@@ -18,0 +18,1 @@Accepted

if (await limiter.blocked(ip)) return tooMany();

@@ -31,1 +32,1 @@Accepted

res.status(401).end();

res.status(401).json({ error: "bad_login" });

HTML

<div class="aia-hunk-review" role="status" aria-label="Reviewing three changes in src/server/limiter.ts">
  <div class="aia-hunk-review-head">
    <svg class="aia-hunk-review-icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M14 3H7a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h10a2 2 0 0 0 2-2V8z"/><path d="M14 3v5h5"/></svg>
    <span class="aia-hunk-review-path">src/server/<b>limiter.ts</b></span>
    <span class="aia-hunk-review-count" aria-hidden="true"></span>
  </div>
  <div class="aia-hunk-review-hunk">
    <div class="aia-hunk-review-bar"><code>@@ -4,1 +4,1 @@</code><span class="aia-hunk-review-ctl"><span class="aia-hunk-review-acts"><button type="button">Reject</button><button type="button">Accept</button></span><span class="aia-hunk-review-ok"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="m5.5 12.5 4 4 9-9.5"/></svg>Accepted</span></span></div>
    <p class="aia-hunk-review-del">const LIMIT = 10;</p>
    <p class="aia-hunk-review-add">const LIMIT = Number(env.LOGIN_LIMIT ?? 5);</p>
  </div>
  <div class="aia-hunk-review-hunk">
    <div class="aia-hunk-review-bar"><code>@@ -18,0 +18,1 @@</code><span class="aia-hunk-review-ctl"><span class="aia-hunk-review-acts"><button type="button">Reject</button><button type="button">Accept</button></span><span class="aia-hunk-review-ok"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="m5.5 12.5 4 4 9-9.5"/></svg>Accepted</span></span></div>
    <p class="aia-hunk-review-add">if (await limiter.blocked(ip)) return tooMany();</p>
  </div>
  <div class="aia-hunk-review-hunk">
    <div class="aia-hunk-review-bar"><code>@@ -31,1 +32,1 @@</code><span class="aia-hunk-review-ctl"><span class="aia-hunk-review-acts"><button type="button">Reject</button><button type="button">Accept</button></span><span class="aia-hunk-review-ok"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="m5.5 12.5 4 4 9-9.5"/></svg>Accepted</span></span></div>
    <p class="aia-hunk-review-del">res.status(401).end();</p>
    <p class="aia-hunk-review-add">res.status(401).json({ error: "bad_login" });</p>
  </div>
</div>

CSS

@property --aia-hunk-review-t {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}
@property --aia-hunk-review-n {
  syntax: "<integer>";
  inherits: false;
  initial-value: 0;
}
.aia-hunk-review {
  --c: var(--aia-color, #7c5cff);
  font-size: var(--aia-size, 16px);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.4;
  position: relative;
  box-sizing: border-box;
  padding: 0.9em 1em;
  border-radius: 0.9em;
  background: color-mix(in srgb, currentColor 3%, transparent);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, currentColor 11%, transparent), 0 0.1em 0.2em color-mix(in srgb, currentColor 4%, transparent), 0 0.9em 2em -1.1em rgb(0 0 0 / 0.3);
  --d: 8.4s;
  --t: var(--aia-hunk-review-t);
  --add: color-mix(in srgb, #16a34a 78%, currentColor);
  --del: color-mix(in srgb, #dc2626 80%, currentColor);
  width: 24em;
  padding: 0 0 0.45em;
  overflow: hidden;
  animation: aia-hunk-review-clock var(--d) linear infinite;
}
.aia-hunk-review > * {
  animation: aia-hunk-review-fade var(--d) linear infinite;
}
.aia-hunk-review-head {
  display: flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.6em 0.85em;
  border-bottom: 1px solid color-mix(in srgb, currentColor 9%, transparent);
  font-size: 0.82em;
}
.aia-hunk-review-icon {
  width: 1.1em;
  height: 1.1em;
  color: color-mix(in srgb, currentColor 55%, transparent);
}
.aia-hunk-review-path {
  margin-right: auto;
  color: color-mix(in srgb, currentColor 60%, transparent);
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}
.aia-hunk-review-path b {
  color: currentColor;
  font-weight: 600;
}
.aia-hunk-review-count {
  color: color-mix(in srgb, currentColor 55%, transparent);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  --aia-hunk-review-n: calc(clamp(0, (var(--t) - 0.6) * 6, 1) + clamp(0, (var(--t) - 1.6) * 6, 1) + clamp(0, (var(--t) - 2.6) * 6, 1) - 0.4);
  counter-reset: n var(--aia-hunk-review-n);
}
.aia-hunk-review-count::before { content: counter(n) " of 3 accepted"; }
.aia-hunk-review-hunk {
  --i: 0;
  --f: clamp(0, min(var(--t) - var(--i) - 0.15, var(--i) + 0.62 - var(--t)) * 8, 1);
  --a: clamp(0, (var(--t) - var(--i) - 0.6) * 6, 1);
  margin: 0.35em 0.45em 0;
  overflow: hidden;
  border-radius: 0.5em;
  background: color-mix(in srgb, #16a34a calc(var(--a) * 8%), transparent);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, #16a34a calc(var(--a) * 35%), color-mix(in srgb, currentColor 9%, transparent));
}
.aia-hunk-review-hunk:nth-of-type(3) { --i: 1; }
.aia-hunk-review-hunk:nth-of-type(4) { --i: 2; }
.aia-hunk-review-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 1.5em;
  padding: 0 0.3em 0 0.6em;
  background: color-mix(in srgb, currentColor 4%, transparent);
}
.aia-hunk-review-bar code {
  color: color-mix(in srgb, var(--c) 70%, currentColor);
  font: 0.66em ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}
.aia-hunk-review-ctl {
  display: grid;
  justify-items: end;
}
.aia-hunk-review-ctl > * {
  grid-area: 1 / 1;
}
.aia-hunk-review-acts,
.aia-hunk-review-ok {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
}
.aia-hunk-review-acts {
  opacity: calc(1 - var(--a));
}
.aia-hunk-review-acts button {
  padding: 0.18em 0.6em;
  border: 0;
  border-radius: 0.4em;
  background: transparent;
  color: color-mix(in srgb, currentColor 60%, transparent);
  font: 600 0.62em system-ui, sans-serif;
  cursor: pointer;
}
.aia-hunk-review-acts button:focus-visible {
  outline: 2px solid var(--c);
  outline-offset: 2px;
}
.aia-hunk-review-acts button + button {
  background: var(--c);
  color: #fff;
  box-shadow: 0 0 0 calc(var(--f) * 0.22em) color-mix(in srgb, var(--c) 35%, transparent);
  transform: scale(calc(1 - clamp(0, min(var(--t) - var(--i) - 0.48, var(--i) + 0.6 - var(--t)) * 10, 1) * 0.08));
}
.aia-hunk-review-ok {
  color: color-mix(in srgb, #16a34a 78%, currentColor);
  font-size: 0.66em;
  font-weight: 600;
  opacity: var(--a);
  transform: translateX(calc((1 - var(--a)) * 0.6em));
}
.aia-hunk-review-ok svg {
  width: 1.1em;
  height: 1.1em;
  stroke-width: 3;
}
.aia-hunk-review-hunk p {
  position: relative;
  display: flex;
  align-items: center;
  height: 1.6em;
  margin: 0;
  padding: 0 0.8em 0 1.9em;
  overflow: hidden;
  font: 0.68em ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  text-overflow: ellipsis;
  white-space: pre;
  opacity: calc(1 - var(--a) * 0.35);
}
.aia-hunk-review-hunk p::before {
  position: absolute;
  left: 0.75em;
  font-weight: 700;
}
.aia-hunk-review-del {
  background: color-mix(in srgb, #dc2626 calc((1 - var(--a)) * 11%), transparent);
}
.aia-hunk-review-del::before { content: "-"; color: var(--del); }
.aia-hunk-review-add {
  background: color-mix(in srgb, #16a34a calc(11% + var(--a) * 3%), transparent);
}
.aia-hunk-review-add::before { content: "+"; color: var(--add); }
.aia-hunk-review-hunk .aia-hunk-review-del {
  text-decoration: line-through color-mix(in srgb, currentColor calc(var(--a) * 45%), transparent);
}
@keyframes aia-hunk-review-clock {
  0%, 6% { --aia-hunk-review-t: 0; }
  80%, 95.5% { --aia-hunk-review-t: 3.1; }
  96.5%, 100% { --aia-hunk-review-t: 0; }
}
@keyframes aia-hunk-review-fade {
  0%, 93% { opacity: 1; }
  95.5%, 97% { opacity: 0; }
  100% { opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .aia-hunk-review,
  .aia-hunk-review > * {
    animation: none;
    --aia-hunk-review-t: 1.1;
  }
}

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

Customizing this snippet

  • Color: set --aia-color on the element or a parent. Currently previewing #3b82f6.
  • Base size: set --aia-size. Every other dimension is in em, so the whole thing scales together. Currently previewing 16px.
  • 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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