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Table of Contents
Interactive Demo
Mouse and Touch Event Handling
Enhancing the Visuals and Audio
Replicating Game Mechanics
Home Web Front-end CSS Tutorial Recreating Game Elements for the Web: The Among Us Card Swipe

Recreating Game Elements for the Web: The Among Us Card Swipe

Mar 27, 2025 am 09:35 AM

Recreating Game Elements for the Web: The Among Us Card Swipe

Web developers often draw inspiration from video game design. From the user interfaces of popular titles like Overwatch to the engaging mechanics of games such as Pokémon Go, game elements offer rich possibilities for enhancing web development projects. This approach allows for focused skill development by tackling specific game features rather than building entire games. This focused approach often exposes developers to new technologies and techniques.

This article demonstrates recreating the Among Us card swipe mechanic. For those unfamiliar, Among Us is a multiplayer game where players must identify imposters among crewmates while completing tasks. The card swipe task, despite its simplicity, has achieved memetic status due to its difficulty.

Interactive Demo

Here's a recreation of the Among Us card swipe: (The demo would be embedded here)

Let's explore the techniques used to build this demo.

Mouse and Touch Event Handling

The core functionality involves making the card draggable. The card follows the pointer horizontally while remaining vertically aligned with the reader. Dragging is limited to a specific range, and the card resets to its original position upon release.

This is achieved using mouse and touch event handlers. Three functions – for mousedown, mousemove, and mouseup (or their touch equivalents) – manage the interaction. Here's a simplified JavaScript code snippet:

const card = document.getElementById('card');
const reader = document.getElementById('reader');
let active = false;
let initialX;

// Event listeners
document.addEventListener('mousedown', dragStart);
document.addEventListener('mousemove', drag);
document.addEventListener('mouseup', dragEnd);
document.addEventListener('touchstart', dragStart);
document.addEventListener('touchmove', drag);
document.addEventListener('touchend', dragEnd);

// ... (dragStart, drag, dragEnd, and setTranslate functions as in the original) ...

Validating Swipes with performance.now()

Swipe validation checks speed and distance. Insufficient distance or incorrect speed results in an invalid swipe.

The card's position relative to the reader is checked in dragEnd:

let status;
// ... (check if card wasn't swiped all the way) ...

Swipe duration is measured using performance.now() timestamps in dragStart and dragEnd.

// ... (timestamps taken at drag start and end using performance.now()) ...

The data-status attribute of the reader element is updated based on the validation result. CSS then displays the appropriate message and illuminates a green or red light.

/* CSS for status messages and light indicators */

Enhancing the Visuals and Audio

Further refinements include using a custom font (DSEG) for a retro LCD look, adding a subtle jitter animation to the text using CSS:

/* CSS for jitter animation */

And finally, incorporating the original game's sound effects:

// ... (audio playback for valid/invalid swipes) ...

This enhances the overall user experience.

Replicating Game Mechanics

This Among Us card swipe recreation demonstrates how replicating game elements can broaden web development skills. By focusing on a specific game mechanic, developers can explore various technologies and design aspects within a manageable scope. Try replicating your favorite game mechanics – you might be surprised at what you learn!

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