Last active
July 16, 2019 14:30
-
-
Save sandwichsudo/5a60c87b9990c0aef6657e476262f6eb to your computer and use it in GitHub Desktop.
React Infinite scroll component (design for use with ApolloClient/Relay Pagination)
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| /** | |
| * Credit: https://medium.com/@alfianlosari/graphql-cursor-infinite-scroll-pagination-with-react-apollo-client-and-github-api-fafbc510b667 | |
| * This component will call the onLoadMore prop when you scroll to the bottom of the page or click | |
| * the button, and pass the fetched data to the component you give it | |
| * */ | |
| import React, { Component, Fragment } from 'react'; | |
| import PropTypes from 'prop-types'; | |
| class InfiniteScroll extends Component { | |
| constructor(props) { | |
| super(props); | |
| this.handleOnScroll = this.handleOnScroll.bind(this); | |
| } | |
| componentDidMount() { | |
| window.addEventListener('scroll', this.handleOnScroll); | |
| } | |
| componentWillUnmount() { | |
| window.removeEventListener('scroll', this.handleOnScroll); | |
| } | |
| handleOnScroll() { | |
| // http://stackoverflow.com/questions/9439725/javascript-how-to-detect-if-browser-window-is-scrolled-to-bottom | |
| const scrollTop = | |
| (document.documentElement && document.documentElement.scrollTop) || | |
| document.body.scrollTop; | |
| const scrollHeight = | |
| (document.documentElement && | |
| document.documentElement.scrollHeight) || | |
| document.body.scrollHeight; | |
| const clientHeight = | |
| document.documentElement.clientHeight || window.innerHeight; | |
| const scrolledToBottom = | |
| Math.ceil(scrollTop + clientHeight) >= scrollHeight; | |
| if (scrolledToBottom && this.props.hasNextPage) { | |
| this.props.onLoadMore(); | |
| } | |
| } | |
| render() { | |
| const { | |
| error, | |
| loading, | |
| RenderComponent, | |
| data, | |
| onLoadMore, | |
| hasNextPage, | |
| } = this.props; | |
| return ( | |
| <Fragment> | |
| <RenderComponent error={error} loading={loading} {...data} /> | |
| <div className="container-fluid--limit"> | |
| <button | |
| disabled={!hasNextPage} | |
| className="button-small" | |
| onClick={onLoadMore} | |
| > | |
| Load more | |
| </button> | |
| </div> | |
| </Fragment> | |
| ); | |
| } | |
| } | |
| InfiniteScroll.propTypes = { | |
| // any error that happened while fetching data | |
| error: PropTypes.string, | |
| // whether we are loading data or not | |
| loading: PropTypes.bool, | |
| // the component to pass the loaded data to | |
| RenderComponent: PropTypes.func.isRequired, | |
| // the loaded data to pass to the component | |
| data: PropTypes.object, | |
| }; | |
| export default InfiniteScroll; |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment