Fork of React horizontal scrolling menu

Poll what you like/dislike/need from this library

Proud corner

performance-dashboard-on-aws | React status code

Examples

Demo

Basic example

Hidden scrollbar and arrows on bottom

Select item

Drag by mouse

Click and select multiple items

Scroll by 1 item

Center items

Dynamically add items when last is visible

apiRef - controling component outside

Add item and scroll to it

RTL

Loop scroll

One centered item

Custom transition/animation

Swipe on mobile devices(need to run locally, codesandbox has issues)

Previous version V1

This is a horizontal scrolling menu component for React. Menu component has adaptive width, just set width for parent container. Items width will be determined from CSS styles.

For navigation, you can use scrollbar, native touch scroll, mouse wheel or drag by mouse.

Component provide context with visible items and helpers.

Possible set default position on initialization.

⭐ if you like the project :)

NextJS issues

Cannot use import statement outside a module_

Quick start

npm install @ramirezcgn/react-horizontal-scrolling-menu

In project:

import React from 'react';
import { ScrollMenu, VisibilityContext } from '@ramirezcgn/react-horizontal-scrolling-menu';
import '@ramirezcgn/react-horizontal-scrolling-menu/dist/styles.css';

const getItems = () =>
  Array(20)
    .fill(0)
    .map((_, ind) => ({ id: `element-${ind}` }));

function App() {
  const [items, setItems] = React.useState(getItems);
  const [selected, setSelected] = React.useState([]);
  const [position, setPosition] = React.useState(0);

  const isItemSelected = (id) => !!selected.find((el) => el === id);

  const handleClick =
    (id) =>
    ({ getItemById, scrollToItem }) => {
      const itemSelected = isItemSelected(id);

      setSelected((currentSelected) =>
        itemSelected
          ? currentSelected.filter((el) => el !== id)
          : currentSelected.concat(id)
      );
    };

  return (
    <ScrollMenu LeftArrow={LeftArrow} RightArrow={RightArrow}>
      {items.map(({ id, i }) => (
        <Card
          itemId={id} // NOTE: itemId is required for track items
          itemClassName={ i % 2 ? 'odd' : 'even'} // Optional custom class for item container element
          title={id}
          key={id}
          onClick={handleClick(id)}
          selected={isItemSelected(id)}
        />
      ))}
    </ScrollMenu>
  );
}

function LeftArrow() {
  const { isFirstItemVisible, scrollPrev } =
    React.useContext(VisibilityContext);

  return (
    <Arrow disabled={isFirstItemVisible} onClick={() => scrollPrev()}>
      Left
    </Arrow>
  );
}

function RightArrow() {
  const { isLastItemVisible, scrollNext } = React.useContext(VisibilityContext);

  return (
    <Arrow disabled={isLastItemVisible} onClick={() => scrollNext()}>
      Right
    </Arrow>
  );
}

function Card({ onClick, selected, title, itemId }) {
  const visibility = React.useContext(VisibilityContext);

  return (
    <div
      onClick={() => onClick(visibility)}
      style={{
        width: '160px',
      }}
      tabIndex={0}
    >
      <div className="card">
        <div>{title}</div>
        <div>visible: {JSON.stringify(!!visibility.isItemVisible(itemId))}</div>
        <div>selected: {JSON.stringify(!!selected)}</div>
      </div>
      <div
        style={{
          height: '200px',
        }}
      />
    </div>
  );
}

export default App;

Check out Example in example-nextjs folder for info how to implement more features like mouse drag or disable body scroll.

Example

You can clone repository and run demo project.

git clone https://github.com/ramirezcgn/react-horizontal-scrolling-menu
yarn install
yarn run demo

Helpers and api

Children of main ScrollMenu component(arrows, fotter, items) can use VisibilityContext to access state and callbacks. Function callbacks also pass context, eg onWheel, onScroll etc.

Properties and callbacks

Prop	Signature
LeftArrow	React component for left arrow
RightArrow	React component for right arrow
Header	React component Header
Footer	React component Footer
onWheel	(VisibilityContext, event) => void
onScroll	(VisibilityContext, event) => void, will fire before scroll
onInit	(VisibilityContext) => void
apiRef	React.RefObject
onUpdate	(VisibilityContext) => void
onMouseDown	(VisibilityContext) => (React.MouseEventHandler) => void
onMouseUp	(VisibilityContext) => (React.MouseEventHandler) => void
onMouseMove	(VisibilityContext) => (React.MouseEventHandler) => void
onTouchMove	(VisibilityContext) => (React.TouchEventHandler) => void
onTouchStart	(VisibilityContext) => (React.TouchEventHandler) => void
onTouchEnd	(VisibilityContext) => (React.TouchEventHandler) => void
itemClassName	ClassName of Item
separatorClassName	ClassName of Item's separator
scrollContainerClassName	ClassName of scrollContainer
transitionDuration	Duration of transitions in ms, default 500
transitionBehavior	'smooth' |'auto' | customFunction
transitionEase	Ease function, eg t => t*(2-t)
wrapperClassName	ClassName of the outer-most div
RTL	Enable Right to left direction
noPolyfill	Don't use polyfill for scroll, no transitions

VisibilityContext

Prop	Signature
getItemById	itemId => IOItem | undefined
getItemElementById	itemId => DOM Element | null
getItemByIndex	index => IOItem | undefined
getItemElementByIndex	index => DOM Element | null
getNextElement (use this first, result without separators)	() => IOItem | undefined
getNextItem	() => IOItem | undefined)
getPrevElement (use this first, result without separators)	() => IOItem | undefined
getPrevItem	() => IOItem | undefined
initComplete	boolean
isFirstItemVisible	boolean
isItemVisible	itemId => boolean
isLastItem	boolean
isLastItemVisible	boolean
scrollNext	(behavior, inline, block, ScrollOptions) => void
scrollPrev	(behavior, inline, block, ScrollOptions) => void
scrollToItem	(item, behavior, inline, block, ScrollOptions) => void
initComplete	boolean
items	ItemsMap class instance
scrollContainer	Ref
visibleElements	['item1', 'item2']
visibleElementsWithSeparators	['item1', 'item1-separator', 'item2']
visibleItemsWithoutSeparators (deprecated, use visibleElements)	['item1', 'item2']
visibleItems (deprecated, use visibleElementsWithSeparators)	['item1', 'item1-separator', 'item2']

Transition/Animation

NOTE: won't work with RTL prop

Can use transitionDuration, transitionEase and transitionBehavior See example

ScrollOptions for scrollToItem, scrollPrev, scrollNext

Will override transition* options passed to ScrollMenu

{
  // target,
  behavior, // 'smooth', 'auto' or custom function
    // inline,
    // block,
    {
      duration: number, // number in milliseconds
      ease: (t) => t, // ease function, more https://gist.github.com/gre/1650294#file-easing-js
    };
}

Other helpers

slidingWindow

Can get previous or next visible group of items with slidingWindow(allItems: string[], visibleItems: string[]) helper, e.g

slidingWindow(allItems, visibleItems)
.prev()
//.next()

getItemsPos

Can get first, center and last items, e.g.

const prevGroup = slidingWindow(allItems, visibleItems).prev()
const { first, center: centerItem, last } = getItemsPos(prevGroup)

// and scroll to center item of previous group of items
scrollToItem(getItemById(centerItem, 'smooth', 'center'))

Check out examples

apiRef

Can pass Ref object to Menu, current value will assigned as VisibilityContext. But visibleItems and some other values can be staled, so better use it only for firing functions like scrollToItem.

For scrolling use apiRef.scrollToItem(apiRef.getItemElementById) instead of apiRef.scrollToItem(apiRef.getItemById).

Can get item outside of context via apiRef.getItemElementById(id) or directly via document.querySelector(`[data-key='${itemId}']`). See apiRef example and Add item and scroll to it

Browser support

• Browser must support IntersectionObserver API and requestAnimationFrame or use polyfills.
• Only modern browsers, no IE or smart toasters

About

My first npm project. Sorry for my english.

Any contribution and correction appreciated. Just fork repo, commit and make PR, don't forget about tests.

Contributing

Changelog