react-easy-infinite-scroll-hook

react-easy-infinite-scroll-hook

A hook that will save you from endless scrolling problems! Infinite scrolling that really works and is very easy to integrate! This hook allows you to create simple, lightweight components with infinite scrolling in all directions, supporting both windowed and scrollable elements.

Features

• ⏬ Universal - Ability to use all types of scrollable elements or any react-virtualized components
• 📦 Support for all loading directions - You can infinitely scroll a component in any direction or in all directions at once (up, down, left, right)
• 📏 No need to specify heights - No need to pass the dimensions of the component, scrollbar or element
• 💬 Support for "chat history" - Reverse mode includes
• 👫 Cross-browser - Works out-of-the-box for most browsers, regardless of version.
• ⚙️ Matches native API - Intuitive to use
• 🛠 Written in TypeScript - It'll fit right into your existing TypeScript project
• 📲 Mobile-friendly - Supports mobile devices and touch screens.
• ✅ Fully unit tested - 100% test coverage
• 🌳 Tree-shakeable - Only include the parts you use
• 💥 Lightweight - Around ~2kB
• 💨 No dependencies

Install

  # with npm
  npm install --save react-easy-infinite-scroll-hook
  # with yarn
  yarn add react-easy-infinite-scroll-hook

Usage

You can create infinite scrolling in any direction and in any pair, for example: up-down, down-right, etc. and even all at once.

Try it live:

Name	Description	Link
Simple List	Simple list component with infinite scroll down
Window List	Infinite scroll list that uses the window's scroll as its container

Simple Example

import useInfiniteScroll from 'react-easy-infinite-scroll-hook';

const InfiniteListComponent = ({ isLoading, items, canLoadMore, next }) => {
  const { setRef } = useInfiniteScroll({
    // Function to fetch more items
    next,
    // The number of items loaded if you use the "Y-scroll" axis ("up" and "down")
    // if you are using the "X-scroll" axis ("left" and "right") use "columnCount" instead
    // you can also use "rowCount" and "columnCount" if you use "Y-scroll" and "X-scroll" at the same time
    rowCount: items.length,
    // Whether there are more items to load
    // if marked "true" in the specified direction, it will try to load more items if the threshold is reached
    // support for all directions "up", "down", "left", "right", both individually and in all directions at the same time
    hasMore: { down: canLoadMore },
  });

  return (
    <div
      ref={setRef}
      style={{
        height: 500,
        overflowY: 'auto',
      }}
    >
      {items.map((item) => (
        <div key={item.key}>{item.value}</div>
      ))}
      {isLoading && <div>Loading...</div>}
    </div>
  );
};

Virtualized Example (react-virtualized)

This hook supports all react-virtualized components (Collection, Grid, MultiGrid, List, Masonry, Table).

Try it live:

Component	Description	Link
List	Virtualized List component with infinite scroll
Grid	Virtualized Grid component with infinite scroll down and right

import useInfiniteScroll from 'react-easy-infinite-scroll-hook';
import { List } from 'react-virtualized';

const VirtualizedInfiniteListComponent = ({ isLoading, items, canLoadMore, next }) => {
  const { setRef } = useInfiniteScroll({
    next,
    rowCount: items.length,
    hasMore: { down: canLoadMore },
  });

  return (
    <div>
      <List
        ref={setRef}
        width={500}
        height={500}
        rowHeight={60}
        rowCount={items.length}
        rowRenderer={({ key, index, style }) => {
          const item = data[index];

          return (
            <div key={key} style={style}>
              {item}
            </div>
          );
        }}
      />
      {isLoading && <div>Loading...</div>}
    </div>
  );
};

API

After initialization, this hook returns a setRef function, which you must pass to your element ref.

Props

Name	Required	Description	Type	Default Value
next	Yes	A callback when more items are requested by the user. Receives a single parameter specifying the direction to load e.g. (direction) => Promise<void>	Function
hasMore	Yes	Whether there are more items to load. If marked true in the specified direction, it will try to load more items if the threshold is reached. Expect object with directions to load { up: false, down: false, left: false, right: false }	object
rowCount	Condition	Number of items in a vertical list (scroll axis Y). Required if you are using vertical scroll.	number
columnCount	Condition	Number of items in a horizontal list (scroll axis X). Required if you are using horizontal scroll.	number
onScroll		The callback is called when the container is scrolled: ({ clientHeight: number, scrollHeight: number, scrollTop: number, clientWidth: number, scrollWidth: number, scrollLeft: number }) => void	Function
initialScroll		The initial scroll position of the element, which is applied after the ref has been initialized	object
reverse		The direction of the scroll axis is used to create scrolling in the opposite direction, for example when using the CSS style flex-direction: 'row-reverse'	object
scrollThreshold		The threshold at which the next function is called. It can be specified in pixels from the scrollbar value, for example '200px' and as a percentage of the container size from 0.1 to 1 (1 is 100%)	number or string	1
windowScroll		When set to true, uses a window as the scroll element. If you are using a scroll window, then anything you pass to the setRef function will be ignored	boolean	false

Friends

• Any DOM element with scroll
• react-virtualized components

FAQ

Can I use it with other virtualized or components libraries?

Yes you can! To use it with other libraries you must specify the correct DOM element for the setRef function.

Can I use it with flex-direction: 'column-reverse'?

Yes, just pass reverse: { column: true } to props for flex-direction: 'column-reverse' or reverse: { row: true } for flex-direction: 'row-reverse'.

How to use it with react-virtualized MultiGrid component?

MultiGrid is a complex component with a lot of scrollable containers, and to use it you must specify the correct container for the setRef function:

import React, { useCallback } from 'react';
import useInfiniteScroll from 'react-easy-infinite-scroll-hook';
import { MultiGrid } from 'react-virtualized';

const VirtualizedInfiniteMultiGridComponent = ({ isLoading, items, canLoadMore, next }) => {
  const { setRef } = useInfiniteScroll({
    next,
    columnCount: items.length,
    hasMore: { right: canLoadMore },
  });

  // Use `useCallback` so we don't recreate the function on each render - Could result in infinite loop
  const selectRef = useCallback(
    (node) => {
      setRef(node._bottomRightGrid);
    },
    [setRef]
  );

  return (
    <div>
      <MultiGrid ref={selectRef} {...props} />
      {isLoading && <div>Loading...</div>}
    </div>
  );
};

Contributing

Please read through our contributing guidelines. Included are directions for opening issues, coding standards, and notes on development.

License

Code released under the MIT License © Vadim Rogov.