Collapsible Accordion

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<!--
Snippet Name: Collapsible Accordion
Description: Reusable collapsible accordion snippet for frontend projects.
Author: DevSnips Contributors
Usage Example: Open `Vanilla/Components/Accordions/collapsible-accordion/collapsible-accordion.html` and copy the snippet into your project.
-->

<div class="collapsible-accordion">
  <div class="accordion-item">
    <button class="accordion-header" aria-expanded="false">
      <span>Section 1</span>
      <svg class="icon" viewBox="0 0 24 24">
        <path d="M16.59 8.59L12 13.17 7.41 8.59 6 10l6 6 6-6z"/>
      </svg>
    </button>
    <div class="accordion-content">
      <p>Content for section 1 goes here.</p>
    </div>
  </div>

  <div class="accordion-item">
    <button class="accordion-header" aria-expanded="false">
      <span>Section 2</span>
      <svg class="icon" viewBox="0 0 24 24">
        <path d="M16.59 8.59L12 13.17 7.41 8.59 6 10l6 6 6-6z"/>
      </svg>
    </button>
    <div class="accordion-content">
      <p>Content for section 2 goes here.</p>
    </div>
  </div>
</div>

<style>
.collapsible-accordion {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
}

.accordion-item {
  border: 1px solid var(--ds-border, #ddd);
  margin-bottom: 5px;
}

.accordion-header {
  width: 100%;
  padding: 15px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: none;
  background: var(--ds-surface-2, #f4f4f4);
  cursor: pointer;
}

.accordion-header:hover {
  background: var(--ds-surface-3, #e4e4e4);
}

.accordion-content {
  padding: 0 15px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease-out;
}

.accordion-header[aria-expanded="true"] + .accordion-content {
  max-height: 100px;
}

.icon {
  width: 24px;
  height: 24px;
  transition: transform 0.2s ease;
}

.accordion-header[aria-expanded="true"] .icon {
  transform: rotate(180deg);
}

@media (max-width: 480px) {
  .accordion-header {
    padding: 10px;
  }
  
  .accordion-content {
    padding: 0 10px;
  }
}

/* devsnips-qa:quality-bar */
@media (prefers-reduced-motion: reduce){*{animation-duration:0.01ms !important;animation-iteration-count:1 !important;transition-duration:0.01ms !important;scroll-behavior:auto !important;}}
:focus-visible{outline:2px solid var(--ds-accent, #2563eb);outline-offset:2px;}


/* DevSnips design tokens (Swiss) — edit tokens.css to re-theme */
:root{
--ds-bg:#fff;--ds-surface:#fff;--ds-surface-2:#f7f7f7;--ds-surface-3:#ededed;--ds-foreground:#0a0a0a;--ds-muted:#525252;--ds-subtle:#a3a3a3;--ds-border:#e5e5e5;--ds-border-strong:#d4d4d4;--ds-accent:#2563eb;--ds-accent-hover:#1d4ed8;--ds-accent-fg:#fff;--ds-accent-soft:#eff6ff;--ds-success:#16a34a;--ds-success-soft:#f0fdf4;--ds-warning:#d97706;--ds-warning-soft:#fffbeb;--ds-danger:#dc2626;--ds-danger-soft:#fef2f2;--ds-info:#2563eb;--ds-info-soft:#eff6ff;--ds-font-sans:system-ui,-apple-system,'Segoe UI',Roboto,Inter,'Helvetica Neue',Arial,sans-serif;--ds-font-mono:ui-monospace,'SF Mono','JetBrains Mono',Menlo,Consolas,monospace;--ds-text-xs:.75rem;--ds-text-sm:.875rem;--ds-text-base:1rem;--ds-text-lg:1.125rem;--ds-text-xl:1.25rem;--ds-text-2xl:1.5rem;--ds-text-3xl:1.875rem;--ds-text-4xl:2.25rem;--ds-leading-tight:1.25;--ds-leading-normal:1.5;--ds-leading-relaxed:1.625;--ds-weight-normal:400;--ds-weight-medium:500;--ds-weight-semibold:600;--ds-weight-bold:700;--ds-space-0:0;--ds-space-px:1px;--ds-space-1:.25rem;--ds-space-2:.5rem;--ds-space-3:.75rem;--ds-space-4:1rem;--ds-space-5:1.25rem;--ds-space-6:1.5rem;--ds-space-8:2rem;--ds-space-10:2.5rem;--ds-space-12:3rem;--ds-space-16:4rem;--ds-radius-sm:.25rem;--ds-radius-md:.5rem;--ds-radius-lg:.75rem;--ds-radius-xl:1rem;--ds-radius-2xl:1.5rem;--ds-radius-full:9999px;--ds-shadow-sm:0 1px 2px 0 rgba(0,0,0,.05);--ds-shadow-md:0 4px 6px -1px rgba(0,0,0,.08),0 2px 4px -2px rgba(0,0,0,.05);--ds-shadow-lg:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -4px rgba(0,0,0,.05);--ds-duration-fast:120ms;--ds-duration-normal:200ms;--ds-duration-slow:300ms;--ds-ease-out:cubic-bezier(.16,1,.3,1);--ds-ease-in-out:cubic-bezier(.4,0,.2,1);--ds-ring:0 0 0 2px #2563eb;--ds-container:1200px;--ds-gutter:1rem;
}
@media (prefers-color-scheme: dark){:root{--ds-bg:#0a0a0a;--ds-surface:#111;--ds-surface-2:#171717;--ds-surface-3:#1f1f1f;--ds-foreground:#fafafa;--ds-muted:#a3a3a3;--ds-subtle:#737373;--ds-border:#262626;--ds-border-strong:#404040;--ds-accent:#3b82f6;--ds-accent-hover:#60a5fa;--ds-accent-fg:#fff;--ds-accent-soft:#172554;--ds-success:#22c55e;--ds-success-soft:#052e16;--ds-warning:#f59e0b;--ds-warning-soft:#422006;--ds-danger:#ef4444;--ds-danger-soft:#450a0a;--ds-info:#3b82f6;--ds-info-soft:#172554;--ds-ring:0 0 0 2px #3b82f6;}}
</style>

<script>
document.querySelectorAll('.accordion-header').forEach(button => {
  button.addEventListener('click', () => {
    const expanded = button.getAttribute('aria-expanded') === 'true';
    button.setAttribute('aria-expanded', !expanded);
  });
});
</script>

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# Collapsible Accordion

Collapsible Accordion with responsive design with animations and hover interactions.

**Technology:** vanilla
**Category:** components
**Subcategory:** accordions

**Tags:** accordion, animation, hover-effect, responsive, flexbox, center, layout, button



**Responsive:** Yes