@roligheten/scroll-sync-react

scroll-sync-react

Overview

We provide you with a React.Context.Provider (<ScrollSync/>) Component that you wrap your "context" with, and then wrap each of your scrollable elements with a scroll listner (<ScrollSyncNode/>) And see the magic happen

Note

I needed this type of functionality on a side project, so I researched and found this library https://github.com/okonet/react-scroll-sync

I have so much similarity with this library, but it's not maintained anymore, and uses the legacy context api, which introduced unexpected bugs, so I re-implemented it with the new context API and using react-hooks

codesandbox

A codesandbox that utilizes the latest of this package https://codesandbox.io/s/gallant-sky-joiou

Installation

npm i scroll-sync-react --save

Usage

import { ScrollSync, ScrollSyncNode } from './build';

const App = () =>
  <ScrollSync>
    <div style={{ display: 'flex', position: 'relative', height: 300 }}>
      <ScrollSyncNode group="a">
        <div style={{ overflow: 'auto' }}>
          <section style={{ height: 1000 }}>
            <h1>This is group `a`</h1>
            Scrollable things
          </section>
        </div>
      </ScrollSyncNode>
      <ScrollSyncNode group="a">
        <div style={{ overflow: 'auto' }}>
          <section style={{ height: 1000 }}>
            <h1>This is group `a`</h1>
            Scrollable things
          </section>
        </div>
      </ScrollSyncNode>
    </div>
  </ScrollSync>

API

ScrollSync

prop	type	required	default	description
children	ReactElement	true		wrapper of to-be-synced elements
disabled	boolean	false	false	whether syncing is enabled or not
proportional	boolean	false	true	In case we want scroll to be proportionally applied regardless of the width and/or height

ScrollSyncNode

prop	type	required	default	description
children	ReactElement	true		scrollable element
group	string	false	"default"	the group of scollable elements this node will be synced with
scroll	"two-way", "synced-only" or "syncer-only"	false	"two-way"	to determine scroll configuration with other ScrollSyncNodes
selfLockAxis	"X", "Y", "XY" or null	false	null	to specifiy current node scroll lock axis
onScroll	(event) => void	false	()=>{}	on Node Scroll callback

gify example!

A photo equals a thousand word, how about a GIF!

Todo:

• [x] Vertical scrolling sync
• [x] Providing a codesandbox
• [x] Configure scroll sync via scroll prop
• [x] Horizontal scrolling sync
• [x] Lock axis (locking horizontal or vertical of ScrollSyncNode)
• [x] Adding onScroll node callback
• [x] Providing tests