Contextual Slide Modal

A contextual slide modal built with pure HTML and CSS that introduces additional content by sliding into view from an edge of the screen, keeping the user visually connected to the element that triggered it.

Usage

This component is suited for situations where secondary content should feel related to the current view, such as quick detail panels, inline settings, contextual help, or previews that expand from an existing interface area.

Implementation

The sliding behavior is achieved using CSS transforms, transition timing, and position-based layout, allowing the modal to animate in from a defined direction while maintaining a lightweight and reusable structure.

HTML

<div class="slide-modal" role="dialog" aria-modal="true">
  <div class="slide-panel">
    <header>Quick Action</header>
    <p>Review and confirm your selection.</p>
    <button>Confirm</button>
  </div>
</div>

<div class="slide-modal" role="dialog" aria-modal="true">
  <div class="slide-panel">
    <header>Quick Action</header>
    <p>Review and confirm your selection.</p>
    <button>Confirm</button>
  </div>
</div>

CSS

.slide-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0);
  display: grid;
  place-items: center;
}

.slide-panel {
  width: 220px;
  padding: 16px;
  border-radius: 14px;
  background: #0f172a;
  color: #e5e7eb;
  transform: translateY(20px);
  opacity: 0;
  animation: slideIn .35s ease forwards;
}

.slide-panel header {
  font-weight: 600;
  margin-bottom: 8px;
}

.slide-panel button {
  margin-top: 12px;
  width: 100%;
  padding: 8px;
  border-radius: 10px;
  background: #3b82f6;
  border: none;
  color: white;
  cursor: pointer;
  transition: transform .15s ease, background .15s ease;
}

.slide-panel button:hover {
  background: #2563eb;
  transform: translateY(-1px);
}

@keyframes slideIn {
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.slide-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0);
  display: grid;
  place-items: center;
}

.slide-panel {
  width: 220px;
  padding: 16px;
  border-radius: 14px;
  background: #0f172a;
  color: #e5e7eb;
  transform: translateY(20px);
  opacity: 0;
  animation: slideIn .35s ease forwards;
}

.slide-panel header {
  font-weight: 600;
  margin-bottom: 8px;
}

.slide-panel button {
  margin-top: 12px;
  width: 100%;
  padding: 8px;
  border-radius: 10px;
  background: #3b82f6;
  border: none;
  color: white;
  cursor: pointer;
  transition: transform .15s ease, background .15s ease;
}

.slide-panel button:hover {
  background: #2563eb;
  transform: translateY(-1px);
}

@keyframes slideIn {
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

Notes

• Built with pure HTML and CSS
• No JavaScript required
• Slides into view from a defined direction
• Preserves visual connection to the trigger area
• Reduces disruption compared to full-screen modals
• Works in modern browsers

Preview styles shown. Production customization recommended.

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