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wtf is roller?

yyx990803/roller — explained in plain English

Analysis updated 2026-07-17 · repo last pushed 2014-07-02

★ 5JavaScriptAudience · developerComplexity · 2/5DormantSetup · easy

TL;DR

A lightweight JavaScript library that adds momentum and elastic bounce to touch scrolling on mobile web pages.

Mindmap

mindmap
  root((repo))
    What it does
      Momentum scrolling
      Elastic bounce
      Touch tracking
    Tech stack
      JavaScript
      Client side
    Use cases
      Image galleries
      Carousels
      Date pickers
    Audience
      Frontend developers
    Limitations
      One dimension only
      Minimal docs

Code map

Detail Auto

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filefunction / class

Why would anyone build with this?

REASON 1

Add momentum-based swipe scrolling to a mobile image gallery.

REASON 2

Build a product carousel that feels native on touch devices.

REASON 3

Create a swipeable date picker with elastic edge bounce.

REASON 4

Add swipe-between-articles navigation to a mobile news app.

What's in the stack?

JavaScript

How it stacks up

yyx990803/roller00kaku/wp-rest-playgroundchalarangelo/mini-active-record
Stars555
LanguageJavaScriptJavaScriptJavaScript
Last pushed2014-07-02——
MaintenanceDormant——
Setup difficultyeasyhardeasy
Complexity2/53/51/5
Audiencedeveloperdevelopervibe coder

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · easy Time to first run · 30min

README lacks usage docs, so you must read the source to learn the API.

Yoink these prompts

Prompt 1
Show me how to integrate this library into a horizontal product carousel.
Prompt 2
Explain how the momentum and elastic bounce physics work in this code.
Prompt 3
Write a minimal HTML page that uses this library for a vertical scrolling list.
Prompt 4
Compare this library's approach to native CSS scroll-snap.

Frequently asked questions

wtf is roller?

A lightweight JavaScript library that adds momentum and elastic bounce to touch scrolling on mobile web pages.

What language is roller written in?

Mainly JavaScript. The stack also includes JavaScript.

Is roller actively maintained?

Dormant — no commits in 2+ years (last push 2014-07-02).

How hard is roller to set up?

Setup difficulty is rated easy, with roughly 30min to a first successful run.

Who is roller for?

Mainly developer.

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