36 CSS Search Bars
34 / 36

All 36 in 36 CSS Search Bars

  1. 01Command Palette Cmd+K Search Bar
  2. 02Algolia-Style Instant Search with Highlighted Results Dropdown
  3. 03E-Commerce Product Search Bar with Category Scope Dropdown
  4. 04Header Navbar Integrated Sticky Search Bar
  5. 05SaaS Dashboard Command Search with Recent and Suggested
  6. 06Minimal CSS Search Bar with Animated Underline
  7. 07CSS Rounded Pill Search Bar with Submit Button
  8. 08Glassmorphism CSS Search Bar (Backdrop Blur)
  9. 09Neon Glow CSS Search Bar (Cyberpunk)
  10. 10CSS Search Bar with Animated Caret Highlight
  11. 11CSS Search Bar with Voice Input Microphone Button
  12. 12CSS Search Bar with Loading Spinner Indicator
  13. 13CSS Search Bar with Clear Button (X on Type)
  14. 14Animated Expanding CSS Search Bar on Focus
  15. 15CSS Search Bar with Autocomplete Suggestions Dropdown
  16. 16CSS Search Bar with Keyboard Shortcut Hint (Cmd K / Ctrl K)
  17. 17CSS Search Bar with Filter Chip Tags
  18. 18CSS Search Bar with Recent Searches Dropdown
  19. 19CSS Search Bar with Rotating Placeholder Text
  20. 20CSS People Search Bar with Avatar Chips
  21. 21Neo-Brutalist CSS Search Bar with Offset Stamp
  22. 22Compact Toolbar CSS Search Bar (Docs / Wiki)
  23. 23Hero Section CSS Search Bar with CTA
  24. 24CSS Search Bar with Side Category Indicator
  25. 25Floating CSS Search Bar with Drop Shadow (Elevated)
  26. 26CSS Search + Filter Sidebar Combo Bar
  27. 27CSS Search Bar with Inline Loading Progress Bar
  28. 28CSS Search Bar with Dual-Tone Border Outline
  29. 29CSS Glitch Search Bar with RGB Split Effect
  30. 30Mobile-First Compact CSS Search Bar
  31. 31CSS Search Bar with Focus Ring Bloom Animation
  32. 32CSS Search Bar Combo with Scope Selector
  33. 33CSS Search Bar with Inset Pressed 3D Effect
  34. 34CSS Search Bar with Animated Border Trace
  35. 35Floating Card CSS Search Bar (Modal Style)
  36. 36Aurora Gradient CSS Search Bar
Pure CSSMIT licensed

CSS Search Bar with Animated Border Trace

On focus, a single accent stroke runs around the field like a light travelling a wire, then settles into a full outline. Drawn with an inline SVG rounded rect and stroke-dashoffset — pixel-crisp at any size, and immune to the corner artefacts gradient-border tricks produce.

Live Demo
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The code

<div class="sb-34">
  <button class="sb-34__theme" type="button" aria-pressed="false" aria-label="Switch to dark theme">
    <svg class="sb-34__moon" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path d="M20 14.2A8.2 8.2 0 0 1 9.8 4 8.4 8.4 0 1 0 20 14.2"/></svg>
    <svg class="sb-34__sun" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><circle cx="12" cy="12" r="4"/><path d="M12 3.4v2M12 18.6v2M3.4 12h2M18.6 12h2M6 6l1.4 1.4M16.6 16.6 18 18M18 6l-1.4 1.4M7.4 16.6 6 18"/></svg>
  </button>
  <div class="sb-34__stage">
    <div class="sb-34__bar" role="search">
      <svg class="sb-34__outline" viewBox="0 0 100 100" preserveAspectRatio="none" aria-hidden="true" focusable="false">
        <rect class="sb-34__base" x="1" y="1" width="98" height="98" rx="14" ry="14" pathLength="100" fill="none" stroke="currentColor" stroke-width="2" vector-effect="non-scaling-stroke"></rect>
        <rect class="sb-34__trace" x="1" y="1" width="98" height="98" rx="14" ry="14" pathLength="100" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" vector-effect="non-scaling-stroke"></rect>
      </svg>
      <svg class="sb-34__ico" viewBox="0 0 24 24" fill="none" aria-hidden="true" focusable="false"><circle cx="11" cy="11" r="6.4" stroke="currentColor" stroke-width="1.8"/><path d="m16 16 4.2 4.2" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"/></svg>
      <label class="sb-34__vh" for="sb-34-input">Search components</label>
      <input class="sb-34__input" id="sb-34-input" type="search" placeholder="Search components and tokens" autocomplete="off">
      <kbd class="sb-34__kbd">&crarr;</kbd>
    </div>
  </div>
</div>
.sb-34 {
  --bg: #0e1015;
  --card: #161a22;
  --ink: #eef1f7;
  --muted: #8b93a3;
  --line: #262d3a;
  --acc: #4ade80;
  --acc-2: #22d3ee;
  --ring: #4ade80;
  width: 100%;
  min-height: 100vh;
  min-height: 100svh;
  display: block;
  box-sizing: border-box;
  font-family: system-ui,-apple-system,"Segoe UI",sans-serif;
  color: var(--ink);
  background: radial-gradient(38rem 22rem at 50% 34%, rgba(74,222,128,.08), transparent 70%), var(--bg);
  -webkit-font-smoothing: antialiased;
}

.sb-34 *,
.sb-34 *::before,
.sb-34 *::after {
  box-sizing: border-box;
}

.sb-34__stage {
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: clamp(1rem,4vw,3rem);
}

.sb-34__vh {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.sb-34__bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: .75rem;
  inline-size: min(31rem,100%);
  min-block-size: 58px;
  padding-inline: 1.1rem .5rem;
  border-radius: 14px;
  background: var(--card);
}

.sb-34__outline {
  position: absolute;
  inset: 0;
  inline-size: 100%;
  block-size: 100%;
  overflow: visible;
  pointer-events: none;
}

.sb-34__base {
  color: var(--line);
}

.sb-34__trace {
  color: var(--acc);
  opacity: 0;
  stroke-dasharray: 18 82;
  stroke-dashoffset: 100;
  filter: drop-shadow(0 0 6px currentColor);
  transition: opacity .18s;
}

.sb-34__bar:focus-within .sb-34__base {
  color: transparent;
}

.sb-34__bar:focus-within .sb-34__trace {
  opacity: 1;
  animation: sb-34-run .75s cubic-bezier(.4,0,.2,1) forwards;
}

@keyframes sb-34-run {
  0% {
    stroke-dasharray: 18 82;
    stroke-dashoffset: 100;
  }

  70% {
    stroke-dasharray: 18 82;
    stroke-dashoffset: 0;
  }

  100% {
    stroke-dasharray: 100 0;
    stroke-dashoffset: 0;
  }
}

.sb-34__ico {
  position: relative;
  inline-size: 19px;
  block-size: 19px;
  flex: none;
  color: var(--muted);
  transition: color .2s;
}

.sb-34__bar:focus-within .sb-34__ico {
  color: var(--acc);
}

.sb-34__input {
  position: relative;
  flex: 1;
  min-inline-size: 0;
  border: 0;
  background: none;
  color: var(--ink);
  font: 400 .97rem/1 inherit;
}

.sb-34__input::placeholder {
  color: var(--muted);
}

.sb-34__input:focus {
  outline: none;
}

.sb-34__input::-webkit-search-cancel-button {
  -webkit-appearance: none;
  appearance: none;
}

.sb-34__kbd {
  position: relative;
  display: inline-grid;
  place-items: center;
  inline-size: 2rem;
  block-size: 2rem;
  flex: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #11151c;
  color: var(--muted);
  font: 500 .8rem/1 ui-monospace,Menlo,monospace;
}

.sb-34 :focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 3px;
}

.sb-34__input:focus-visible {
  outline: none;
}

.sb-34[data-theme="light"] {
  --bg: #f5f7f6;
  --card: #ffffff;
  --ink: #0f1720;
  --muted: #68707e;
  --line: #e0e5e2;
  --acc: #0f9d58;
  --acc-2: #0891b2;
  --ring: #0f9d58;
  background: radial-gradient(38rem 22rem at 50% 34%, rgba(15,157,88,.07), transparent 70%), var(--bg);
}

.sb-34[data-theme="light"] .sb-34__kbd {
  background: #f7f9f8;
}

.sb-34[data-theme="light"] .sb-34__trace {
  filter: none;
}

@media (prefers-color-scheme: light) {
  .sb-34:not([data-theme="dark"]) {
    --bg: #f5f7f6;
    --card: #ffffff;
    --ink: #0f1720;
    --muted: #68707e;
    --line: #e0e5e2;
    --acc: #0f9d58;
    --acc-2: #0891b2;
    --ring: #0f9d58;
    background: radial-gradient(38rem 22rem at 50% 34%, rgba(15,157,88,.07), transparent 70%), var(--bg);
  }

  .sb-34:not([data-theme="dark"]) .sb-34__kbd {
    background: #f7f9f8;
  }

  .sb-34:not([data-theme="dark"]) .sb-34__trace {
    filter: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sb-34 *,
    .sb-34 *::before,
    .sb-34 *::after {
    animation: none !important;
    transition: none !important;
  }

  .sb-34__bar:focus-within .sb-34__trace {
    opacity: 1;
    stroke-dasharray: 100 0;
    stroke-dashoffset: 0;
  }
}

@media (forced-colors: active) {
  .sb-34__bar {
    border: 1px solid CanvasText;
  }

  .sb-34__outline {
    display: none;
  }
}

.sb-34__theme {
  position: absolute;
  inset-block-start: clamp(.75rem,2vw,1.25rem);
  inset-inline-end: clamp(.75rem,2vw,1.25rem);
  z-index: 50;
  inline-size: 2.5rem;
  block-size: 2.5rem;
  display: grid;
  place-items: center;
  cursor: pointer;
  padding: 0;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,.12);
  color: currentColor;
  background: rgba(255,255,255,.72);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: background .25s ease, transform .25s cubic-bezier(.16,1,.3,1), border-color .25s ease;
}

.sb-34[data-theme="dark"] .sb-34__theme {
  background: rgba(20,20,28,.72);
  border-color: rgba(255,255,255,.15);
  color: #fff;
}

@media (prefers-color-scheme: dark) {
  .sb-34:not([data-theme="light"]) .sb-34__theme {
    background: rgba(20,20,28,.72);
    border-color: rgba(255,255,255,.15);
    color: #fff;
  }
}

.sb-34__theme:hover {
  transform: translateY(-1px);
  border-color: rgba(0,0,0,.24);
}

.sb-34[data-theme="dark"] .sb-34__theme:hover,
.sb-34:not([data-theme="light"]) .sb-34__theme:hover {
  border-color: rgba(255,255,255,.3);
}

.sb-34__theme:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 3px;
}

.sb-34__theme svg {
  grid-area: 1/1;
  inline-size: 1.1rem;
  block-size: 1.1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.sb-34__sun {
  display: none;
}

.sb-34__theme[aria-pressed="true"] .sb-34__sun {
  display: block;
}

.sb-34__theme[aria-pressed="true"] .sb-34__moon {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  .sb-34__theme {
    transition: none;
  }

  .sb-34__theme:hover {
    transform: none;
  }
}
(()=>{const r=document.querySelector('.sb-34');if(!r)return;const t=r.querySelector('.sb-34__theme');if(!t)return;const dark=()=>(r.dataset.theme||(matchMedia('(prefers-color-scheme: dark)').matches?'dark':'light'))==='dark';const sync=()=>{t.setAttribute('aria-pressed',String(dark()));t.setAttribute('aria-label',dark()?'Switch to light theme':'Switch to dark theme');};t.addEventListener('click',()=>{r.dataset.theme=dark()?'light':'dark';sync();});matchMedia('(prefers-color-scheme: dark)').addEventListener('change',()=>{if(!r.dataset.theme)sync();});sync();})();
Paste this into ChatGPT, Claude, Cursor, or any coding assistant. The block below is pre-framed with everything the AI needs to integrate this demo into your project — markup, styles, scoping notes, and the source URL. Hit Copy and paste straight into your chat.
Here's a working CSS Search Bar from CodeFronts. Use it as-is or adapt to your framework. All classes are scoped under a unique prefix so the code won't collide with your existing styles. MIT licensed.
Demo: CSS Search Bar with Animated Border Trace
Source: https://codefronts.com/components/css-search-boxes/border-trace/

On focus, a single accent stroke runs around the field like a light travelling a wire, then settles into a full outline. Drawn with an inline SVG rounded rect and stroke-dashoffset — pixel-crisp at any size, and immune to the corner artefacts gradient-border tricks produce.
## HTML
```html
<div class="sb-34">
  <button class="sb-34__theme" type="button" aria-pressed="false" aria-label="Switch to dark theme">
    <svg class="sb-34__moon" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path d="M20 14.2A8.2 8.2 0 0 1 9.8 4 8.4 8.4 0 1 0 20 14.2"/></svg>
    <svg class="sb-34__sun" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><circle cx="12" cy="12" r="4"/><path d="M12 3.4v2M12 18.6v2M3.4 12h2M18.6 12h2M6 6l1.4 1.4M16.6 16.6 18 18M18 6l-1.4 1.4M7.4 16.6 6 18"/></svg>
  </button>
  <div class="sb-34__stage">
    <div class="sb-34__bar" role="search">
      <svg class="sb-34__outline" viewBox="0 0 100 100" preserveAspectRatio="none" aria-hidden="true" focusable="false">
        <rect class="sb-34__base" x="1" y="1" width="98" height="98" rx="14" ry="14" pathLength="100" fill="none" stroke="currentColor" stroke-width="2" vector-effect="non-scaling-stroke"></rect>
        <rect class="sb-34__trace" x="1" y="1" width="98" height="98" rx="14" ry="14" pathLength="100" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" vector-effect="non-scaling-stroke"></rect>
      </svg>
      <svg class="sb-34__ico" viewBox="0 0 24 24" fill="none" aria-hidden="true" focusable="false"><circle cx="11" cy="11" r="6.4" stroke="currentColor" stroke-width="1.8"/><path d="m16 16 4.2 4.2" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"/></svg>
      <label class="sb-34__vh" for="sb-34-input">Search components</label>
      <input class="sb-34__input" id="sb-34-input" type="search" placeholder="Search components and tokens" autocomplete="off">
      <kbd class="sb-34__kbd">&crarr;</kbd>
    </div>
  </div>
</div>
```
## CSS
```css
.sb-34 {
  --bg: #0e1015;
  --card: #161a22;
  --ink: #eef1f7;
  --muted: #8b93a3;
  --line: #262d3a;
  --acc: #4ade80;
  --acc-2: #22d3ee;
  --ring: #4ade80;
  width: 100%;
  min-height: 100vh;
  min-height: 100svh;
  display: block;
  box-sizing: border-box;
  font-family: system-ui,-apple-system,"Segoe UI",sans-serif;
  color: var(--ink);
  background: radial-gradient(38rem 22rem at 50% 34%, rgba(74,222,128,.08), transparent 70%), var(--bg);
  -webkit-font-smoothing: antialiased;
}

.sb-34 *,
.sb-34 *::before,
.sb-34 *::after {
  box-sizing: border-box;
}

.sb-34__stage {
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: clamp(1rem,4vw,3rem);
}

.sb-34__vh {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.sb-34__bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: .75rem;
  inline-size: min(31rem,100%);
  min-block-size: 58px;
  padding-inline: 1.1rem .5rem;
  border-radius: 14px;
  background: var(--card);
}

.sb-34__outline {
  position: absolute;
  inset: 0;
  inline-size: 100%;
  block-size: 100%;
  overflow: visible;
  pointer-events: none;
}

.sb-34__base {
  color: var(--line);
}

.sb-34__trace {
  color: var(--acc);
  opacity: 0;
  stroke-dasharray: 18 82;
  stroke-dashoffset: 100;
  filter: drop-shadow(0 0 6px currentColor);
  transition: opacity .18s;
}

.sb-34__bar:focus-within .sb-34__base {
  color: transparent;
}

.sb-34__bar:focus-within .sb-34__trace {
  opacity: 1;
  animation: sb-34-run .75s cubic-bezier(.4,0,.2,1) forwards;
}

@keyframes sb-34-run {
  0% {
    stroke-dasharray: 18 82;
    stroke-dashoffset: 100;
  }

  70% {
    stroke-dasharray: 18 82;
    stroke-dashoffset: 0;
  }

  100% {
    stroke-dasharray: 100 0;
    stroke-dashoffset: 0;
  }
}

.sb-34__ico {
  position: relative;
  inline-size: 19px;
  block-size: 19px;
  flex: none;
  color: var(--muted);
  transition: color .2s;
}

.sb-34__bar:focus-within .sb-34__ico {
  color: var(--acc);
}

.sb-34__input {
  position: relative;
  flex: 1;
  min-inline-size: 0;
  border: 0;
  background: none;
  color: var(--ink);
  font: 400 .97rem/1 inherit;
}

.sb-34__input::placeholder {
  color: var(--muted);
}

.sb-34__input:focus {
  outline: none;
}

.sb-34__input::-webkit-search-cancel-button {
  -webkit-appearance: none;
  appearance: none;
}

.sb-34__kbd {
  position: relative;
  display: inline-grid;
  place-items: center;
  inline-size: 2rem;
  block-size: 2rem;
  flex: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #11151c;
  color: var(--muted);
  font: 500 .8rem/1 ui-monospace,Menlo,monospace;
}

.sb-34 :focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 3px;
}

.sb-34__input:focus-visible {
  outline: none;
}

.sb-34[data-theme="light"] {
  --bg: #f5f7f6;
  --card: #ffffff;
  --ink: #0f1720;
  --muted: #68707e;
  --line: #e0e5e2;
  --acc: #0f9d58;
  --acc-2: #0891b2;
  --ring: #0f9d58;
  background: radial-gradient(38rem 22rem at 50% 34%, rgba(15,157,88,.07), transparent 70%), var(--bg);
}

.sb-34[data-theme="light"] .sb-34__kbd {
  background: #f7f9f8;
}

.sb-34[data-theme="light"] .sb-34__trace {
  filter: none;
}

@media (prefers-color-scheme: light) {
  .sb-34:not([data-theme="dark"]) {
    --bg: #f5f7f6;
    --card: #ffffff;
    --ink: #0f1720;
    --muted: #68707e;
    --line: #e0e5e2;
    --acc: #0f9d58;
    --acc-2: #0891b2;
    --ring: #0f9d58;
    background: radial-gradient(38rem 22rem at 50% 34%, rgba(15,157,88,.07), transparent 70%), var(--bg);
  }

  .sb-34:not([data-theme="dark"]) .sb-34__kbd {
    background: #f7f9f8;
  }

  .sb-34:not([data-theme="dark"]) .sb-34__trace {
    filter: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sb-34 *,
    .sb-34 *::before,
    .sb-34 *::after {
    animation: none !important;
    transition: none !important;
  }

  .sb-34__bar:focus-within .sb-34__trace {
    opacity: 1;
    stroke-dasharray: 100 0;
    stroke-dashoffset: 0;
  }
}

@media (forced-colors: active) {
  .sb-34__bar {
    border: 1px solid CanvasText;
  }

  .sb-34__outline {
    display: none;
  }
}

.sb-34__theme {
  position: absolute;
  inset-block-start: clamp(.75rem,2vw,1.25rem);
  inset-inline-end: clamp(.75rem,2vw,1.25rem);
  z-index: 50;
  inline-size: 2.5rem;
  block-size: 2.5rem;
  display: grid;
  place-items: center;
  cursor: pointer;
  padding: 0;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,.12);
  color: currentColor;
  background: rgba(255,255,255,.72);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: background .25s ease, transform .25s cubic-bezier(.16,1,.3,1), border-color .25s ease;
}

.sb-34[data-theme="dark"] .sb-34__theme {
  background: rgba(20,20,28,.72);
  border-color: rgba(255,255,255,.15);
  color: #fff;
}

@media (prefers-color-scheme: dark) {
  .sb-34:not([data-theme="light"]) .sb-34__theme {
    background: rgba(20,20,28,.72);
    border-color: rgba(255,255,255,.15);
    color: #fff;
  }
}

.sb-34__theme:hover {
  transform: translateY(-1px);
  border-color: rgba(0,0,0,.24);
}

.sb-34[data-theme="dark"] .sb-34__theme:hover,
.sb-34:not([data-theme="light"]) .sb-34__theme:hover {
  border-color: rgba(255,255,255,.3);
}

.sb-34__theme:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 3px;
}

.sb-34__theme svg {
  grid-area: 1/1;
  inline-size: 1.1rem;
  block-size: 1.1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.sb-34__sun {
  display: none;
}

.sb-34__theme[aria-pressed="true"] .sb-34__sun {
  display: block;
}

.sb-34__theme[aria-pressed="true"] .sb-34__moon {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  .sb-34__theme {
    transition: none;
  }

  .sb-34__theme:hover {
    transform: none;
  }
}
```

## JavaScript
```js
(()=>{const r=document.querySelector('.sb-34');if(!r)return;const t=r.querySelector('.sb-34__theme');if(!t)return;const dark=()=>(r.dataset.theme||(matchMedia('(prefers-color-scheme: dark)').matches?'dark':'light'))==='dark';const sync=()=>{t.setAttribute('aria-pressed',String(dark()));t.setAttribute('aria-label',dark()?'Switch to light theme':'Switch to dark theme');};t.addEventListener('click',()=>{r.dataset.theme=dark()?'light':'dark';sync();});matchMedia('(prefers-color-scheme: dark)').addEventListener('change',()=>{if(!r.dataset.theme)sync();});sync();})();
```

How this works

pathLength is the trick. Normally you must know the perimeter in pixels to compute dash values. Setting pathLength="100" tells the browser to treat the path as exactly 100 units long, so the dash maths becomes percentages:

<rect x="1" y="1" width="98%" height="98%" rx="14" pathLength="100"
      fill="none" stroke="currentColor" stroke-width="2" vector-effect="non-scaling-stroke"/>
.sb-34__trace{stroke-dasharray:18 82; stroke-dashoffset:100; opacity:0;}
.sb-34__bar:focus-within .sb-34__trace{
  opacity:1; animation:sb-34-run .75s cubic-bezier(.4,0,.2,1) forwards;
}
@keyframes sb-34-run{
  0%  {stroke-dasharray:18 82; stroke-dashoffset:100;}
  70% {stroke-dasharray:18 82; stroke-dashoffset:0;}
  100%{stroke-dasharray:100 0; stroke-dashoffset:0;}   /* segment becomes the full outline */
}

Why SVG over a conic gradient. A gradient border traces the bounding box, so the highlight speeds up around corners and smears at tight radii. An SVG stroke follows the actual rounded path at constant speed — the difference is obvious side by side.

Sizing. The SVG is absolutely positioned over the field at 100% of it, with preserveAspectRatio="none"; vector-effect:non-scaling-stroke then keeps the 2px stroke from stretching with the box.

Make it yours

  • Change the travelling segment length with the first stroke-dasharray value: 8 is a spark, 30 is a comet.
  • Reverse direction by negating stroke-dashoffset's start value.
  • Two-tone trace: apply a <linearGradient> as the stroke, and it travels with the dash.
  • Match rx to your CSS border-radius exactly, or the trace will float off the corners.

Gotchas — read before shipping

  • An SVG overlay must be pointer-events:none, or it swallows clicks meant for the input.
  • Percentage width/height on the rect plus a 1px inset (x="1" y="1") keeps the stroke from being clipped at the edges.
  • Do not animate stroke-dashoffset on dozens of elements at once — it is a paint-level property, cheap once, expensive in bulk.
  • Keep a real CSS focus indicator underneath: if the animation is disabled by reduced-motion, the field must still show focus (this demo's static outline does).

Browser support

ChromeSafariFirefoxEdge
90+14+88+90+

pathLength, vector-effect and SMIL-free CSS animation of SVG presentation attributes are supported in every current browser. The static focus outline underneath means the field remains accessible even where the animation is suppressed.

Techniques used in this demo

:focus-withinMDN ↗filterMDN ↗backdrop-filterMDN ↗clip-pathMDN ↗role="" (ARIA)MDN ↗radial-gradient()MDN ↗

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