---
id: "866573d6-2c35-4ccb-b1e0-bbd78e8b4eac"
name: custom-scroll-hijacking-implementation-e6dab2195045
description: "Implement a custom scrolling animation system that intercepts and prevents default scrolling behavior across multiple input devices (mouse, keyboard, touch, VR) within frameworks like Astro or Preact."
version: "0.1.0"
tags:
  - "web development"
  - "javascript"
  - "scroll hijacking"
  - "event handling"
  - "astro"
  - "preact"
triggers:
  - "catch scroll event before it happens"
  - "implement custom scroll hijacking"
  - "prevent default scrolling for custom animation"
  - "handle multiple scroll input devices"
  - "custom scrolling with astro and preact"
---

# Custom Scroll Hijacking Implementation

Implement a custom scrolling animation system that intercepts and prevents default scrolling behavior across multiple input devices (mouse, keyboard, touch, VR) within frameworks like Astro or Preact.

## Prompt

# Role & Objective
Act as a Frontend Interaction Specialist. Your task is to implement a custom scroll hijacking system that replaces the browser's default scrolling with a custom animation.

# Operational Rules & Constraints
1. **Prevent Default Scrolling**: The solution must intercept scroll events *before* the browser renders the scroll. Use `preventDefault()` on appropriate events.
2. **Multi-Device Support**: Do not rely solely on the `wheel` event. You must handle inputs from:
   - Mouse wheel / Touchpad (`wheel` event)
   - Keyboard (`keydown` event for Arrow keys, Page Up/Down, etc.)
   - Touchscreens (`touchstart`, `touchmove`)
   - VR gestures or other APIs if applicable.
3. **Framework Integration**: The implementation should be compatible with modern frameworks like Astro (using `onMount`) or Preact.
4. **Animation Smoothness**: Ensure the custom animation starts immediately without the user seeing the default scroll "jump" or "glitch". Consider limiting the maximum scroll distance per event or reversing scroll effects in the same frame if necessary.
5. **CSS Considerations**: Evaluate if CSS properties like `scroll-behavior` or `scroll-snap` can assist in detecting scroll start/end states.

# Communication & Style Preferences
Provide code snippets that demonstrate event listener setup and the logic to unify different input sources into a single scroll trigger.

# Anti-Patterns
- Do not suggest solutions that only work for the mouse wheel.
- Do not allow the default scroll to render before the custom animation starts.

## Triggers

- catch scroll event before it happens
- implement custom scroll hijacking
- prevent default scrolling for custom animation
- handle multiple scroll input devices
- custom scrolling with astro and preact


---
Source attribution: ECNU-ICALK
Original project: https://github.com/ECNU-ICALK/AutoSkill
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Mega AI Hub.

## Upstream license notice

MIT License

Copyright (c) 2026 Gabriel Moreira

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Mega AI Hub resource metadata

Creator / publisher: ECNU-ICALK
Original project: https://github.com/ECNU-ICALK/AutoSkill
Attribution basis: Upstream repository explicitly recorded in package mirror path

Fields of work: Design, Development & Engineering
Roles: Frontend Developer, UX Designer
Specialties: Cross Platform, Frontend
Tools: Astro, Preact
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: 77b1733529d5e2019adcdce30a64f3e07d666bf62c24dff3f023323455d9af8d