Fader

A component that creates smooth gradient fade effects to indicate hidden content on vertical scroll.

Basic Examples

Top Fader

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

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Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.

Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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Totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt.

Explicabo nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit.

Sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt neque porro quisquam est.

Bottom Fader

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.

Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium.

Totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt.

Explicabo nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit sed quia consequuntur magni dolores.

Both Top & Bottom

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.

Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium.

Totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt.

Explicabo nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit.

Sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt neque porro quisquam est qui dolorem.

Smart Scroll Example

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.

Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium.

Totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt.

Explicabo nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt neque porro quisquam est qui dolorem ipsum quia dolor sit amet consectetur adipiscing elit.

Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua ut enim ad minim veniam quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.

Excepteur sint occaecat cupidatat non proident sunt in culpa qui officia deserunt mollit anim id est laborum sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium totam rem aperiam eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo.

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Component Code

Fader.vue

<script setup lang="ts">
import type { CSSProperties } from 'vue'

interface Props {
  stop?: string
  blur?: string
  height?: number
  side: 'top' | 'bottom'
  style?: CSSProperties
}

const props = withDefaults(defineProps<Props>(), {
  stop: '25%',
  blur: '1px',
  height: 150,
})
</script>

<template>
  <div
    aria-hidden="true"
    class="fader"
    :data-side="props.side"
    :style="{
      '--stop': props.stop,
      '--blur': props.blur,
      '--height': `${props.height}px`,
      ...props.style
    }"
  />
</template>

<style scoped>
.fader {
  position: sticky;
  width: 100%;
  height: var(--height);
  pointer-events: none;
  user-select: none;
  backdrop-filter: blur(var(--blur));
  z-index: 10;
}

.fader[data-side="top"] {
  top: 0;
  background: linear-gradient(to top, transparent, var(--ui-bg));
  mask-image: linear-gradient(to bottom, var(--ui-bg) var(--stop), transparent);
  margin-bottom: calc(var(--height) * -1);
}

.fader[data-side="bottom"] {
  bottom: 0;
  background: linear-gradient(to bottom, transparent, var(--ui-bg));
  mask-image: linear-gradient(to top, var(--ui-bg) var(--stop), transparent);
  margin-top: calc(var(--height) * -1);
}
</style>

Smart Scroll Example

SmartFaderExample.vue

<script setup lang="ts">
import { ref } from 'vue'

const topFaderOpacity = ref(0)
const bottomFaderOpacity = ref(1)

function clamp(value: number, min: number, max: number) {
  return Math.min(Math.max(value, min), max)
}

function handleScroll(event: Event) {
  const target = event.target as HTMLElement
  const { scrollTop, scrollHeight, clientHeight } = target
  
  // Top fader: appears progressively as we scroll down
  topFaderOpacity.value = clamp(scrollTop / 100, 0, 1)
  
  // Bottom fader: disappears progressively as we approach the bottom
  const distanceFromBottom = scrollHeight - clientHeight - scrollTop
  bottomFaderOpacity.value = clamp(distanceFromBottom / 100, 0, 1)
}
</script>

<template>
  <div 
    class="relative overflow-y-auto border border-default rounded-lg"
    style="height: 300px; width: 100%; max-width: 500px;"
    @scroll="handleScroll"
  >
    <Fader 
      side="top" 
      :height="100" 
      :style="{ opacity: topFaderOpacity }"
    />
    
    <div class="p-4 *:my-0">
      <!-- Long content with multiple paragraphs -->
    </div>
    
    <Fader 
      side="bottom" 
      :height="100" 
      :style="{ opacity: bottomFaderOpacity }"
    />
  </div>
</template>

Usage Examples

Basic Usage

<template>
  <div class="relative overflow-y-auto h-64">
    <Fader side="top" />
    <div class="p-4">
      Your scrollable content
    </div>
  </div>
</template>

Multiple Faders

<template>
  <div class="relative overflow-y-auto h-64">
    <Fader side="top" height="60" />
    <div class="p-4">
      Content with faders on both ends
    </div>
    <Fader side="bottom" height="60" />
  </div>
</template>

Props

Prop	Type	Default	Description
`side`	`'top' \| 'bottom'`	Required	Position of the fader
`stop`	`string`	`'25%'`	Gradient stop point for the fade effect
`blur`	`string`	`'1px'`	Backdrop blur intensity
`height`	`number`	`150`	Height of the fader in pixels
`style`	`CSSProperties`	`undefined`	Additional CSS styles

How It Works

The Fader component uses CSS gradients and masks to create a smooth fade effect that indicates hidden content.

Core CSS Implementation

Gradient Effects: Uses linear-gradient for background and mask-image for fade transitions
Sticky Positioning: position: sticky keeps faders fixed to their designated side during scroll
No Layout Impact: Negative margins prevent the fader from taking up layout space
Hardware Acceleration: Uses backdrop-filter and CSS transforms for optimal performance

JavaScript Integration (Optional)

Basic Usage: No JavaScript required - just place the component and it works
Advanced Usage: Can be combined with scroll listeners for dynamic opacity control
Smart Behavior: Scroll detection allows progressive opacity changes based on scroll position

Key benefits:

Lightweight: Minimal CSS-based implementation
Flexible: Works standalone or with JavaScript enhancements
Performant: Uses hardware-accelerated CSS properties
Accessible: No interference with scroll behavior or content layout

This website is fully open-source, you can find the source code on GitHub