infinite scroll not working properly in React

Question

I am using infinite scroll plugin for react.js and for some reason it is not working the way it is supposed to work.

The problem is that all the requests are made at once when the page loads, and not like for example a request should be made for each time I scroll.

My code looks like below:

import React from 'react';
import {Route, Link} from 'react-router-dom';
import FourthView from '../fourthview/fourthview.component';
import {withRouter} from 'react-router';
import {Bootstrap, Grid, Row, Col, Button, Image, Modal, Popover} from 'react-bootstrap';
import traineeship from './company.api';
import Header from '../header/header.component';
import InfiniteScroll from 'react-infinite-scroller';

require('./company.style.scss');

class Traineeship extends React.Component {

    constructor(props) {
        super(props);
        this.state = {
            companies: [],
            page: 0,
            resetResult: false,
            hasMore: true,
            totalPages: null,
            totalElements: 0,
        };
    }

    componentDidMount() {
        this.fetchCompanies(this.state.page);
    }

    fetchCompanies = page => {
        let courseIds = '';

        this.props.rootState.filterByCourseIds.map(function (course) {
            courseIds = courseIds + '' + course.id + ',';
        });

        traineeship.getAll(page, this.props.rootState.selectedJob, courseIds.substring(0, courseIds.length - 1), this.props.rootState.selectedCity).then(response => {
            if (response.data) {
                const companies = Array.from(this.state.companies);
                if(response.data._embedded !== undefined){
                    this.setState({
                        companies: companies.concat(response.data._embedded.companies),
                        totalPages: response.data.page.totalPages,
                        totalElements: response.data.page.totalElements,
                    });
                }

                if (page >= this.state.totalPages) {
                    this.setState({hasMore: false});
                }
            } else {
                console.log(response);
            }
        });
    };

    render() {
        return (
            <div className={"wrapperDiv"}>
                {/*{JSON.stringify(this.props.rootState)}*/}
                <div className={"flexDivCol"}>
                    <div id="header2">
                        <div style={{flex: .05}}>
                            <img src="assets/img/icArrowBack.png" onClick={() => this.props.history.go(-1)}/>
                        </div>
                        <div style={{flex: 3}}>
                            <Header size="small"/>
                        </div>
                    </div>
                    <div id="result">
                        <div className={"search"}>
                            <h2 style={{fontSize: 22}}>Harjoittelupaikkoja</h2>
                            <p className={"secondaryColor LatoBold"} style={{fontSize: 13}}>{this.state.totalElements} paikkaa löydetty</p>
                        </div>
                        <div className={"filters"}>
                            <h5 style={{marginTop: '30px', marginBottom: '10px'}} className={"primaryColor"}>
                                <strong>Hakukriteerit</strong></h5>
                            {
                                this.props.rootState.filters.map((filter, key) => (
                                    <div key={key} className={"filter"}>{filter.title}</div>
                                ))
                            }
                        </div>
                        <div className={"searchResults"}>
                            <h5 style={{marginTop: '30px', marginBottom: '10px'}} className={"primaryColor"}>
                                <strong>Hakutulokset</strong></h5>
                            <InfiniteScroll
                                pageStart={0}
                                loadMore={this.fetchCompanies}
                                hasMore={this.state.hasMore}
                                loader={<div className="loader" key={0}>Loading ...</div>}
                                useWindow={false}
                            >
                                {
                                    this.state.companies.map((traineeship, key) => (
                                        <div id={"item"} key={key}>
                                            <div className={"companyInfo"}>
                                                <div className={"heading"}>
                                                    <div id={"companyDiv"}>
                                                        <p className={"LatoBlack"} style={{
                                                            fontSize: '18px',
                                                            lineHeight: '23px'
                                                        }}>{traineeship.name}</p>
                                                    </div>
                                                    {
                                                        traineeship.mediaUrl == null
                                                            ? ''
                                                            :
                                                            <div id={"videoDiv"}>
                                                                <div className={"youtubeBox center"}>
                                                                    <div id={"youtubeIcon"}>
                                                                        <a className={"primaryColor"}
                                                                           href={traineeship.mediaUrl}>
                                                                        <span style={{marginRight: '3px'}}><Image
                                                                            src="http://www.stickpng.com/assets/images/580b57fcd9996e24bc43c545.png"
                                                                            style={{
                                                                                width: '24px',
                                                                                height: '17px'
                                                                            }}/></span>
                                                                            <span> <p style={{
                                                                                fontSize: '13px',
                                                                                lineHeight: '24px',
                                                                                margin: 0,
                                                                                display: 'inline-block'
                                                                            }}>Esittely</p></span>
                                                                        </a>
                                                                    </div>
                                                                    <div id={"txtVideo"}>

                                                                    </div>
                                                                </div>
                                                            </div>
                                                    }

                                                </div>
                                                <div className={"location"}>
                                                    <div id={"locationIcon"}>
                                                        <Image src="assets/img/icLocation.png"
                                                               style={{marginTop: '-7px'}}/>
                                                    </div>
                                                    <div id={"address"}>
                                                        {
                                                            traineeship.addresses.map((address, key) => {
                                                                return (
                                                                    <a href={"https://www.google.com/maps/search/?api=1&query=" + encodeURI("Fredrikinkatu 4, Helsinki")}>
                                                                        <p key={key} className={"primaryColor"} style={{fontSize: '13px'}}>{address.street}, {address.city}</p>
                                                                    </a>
                                                                )
                                                            })
                                                        }
                                                    </div>
                                                </div>
                                                <div className={"companyDescription"}>
                                                    <p className={"secondaryColor"} style={{
                                                        fontSize: '14px',
                                                        lineHeight: '20px'
                                                    }}>{traineeship.description}</p>
                                                </div>

                                                <div>
                                                    {

                                                        traineeship.images.map((image, key) => {
                                                            return (
                                                                <img id={"thumbnail"} width={"100%"}
                                                                     src={image.url}
                                                                     style={{
                                                                         width: '80px',
                                                                         height: '80px',
                                                                         marginRight: '10px',
                                                                         marginBottom: '10px'
                                                                     }}
                                                                     alt=""
                                                                     key={key}
                                                                />
                                                            )
                                                        })
                                                    }
                                                </div>

                                                <div className={"companyContacts"} style={{marginTop: '20px'}}>
                                                    <p className={"contactInfo"}>URL: {traineeship.website}</p>
                                                    <p className={"contactInfo"}>Email: {traineeship.email}</p>
                                                    <p className={"contactInfo"}>Puh: {traineeship.phonenumber}</p>
                                                    <p className={"contactInfo"}>Contact: {traineeship.contact}</p>
                                                </div>
                                            </div>
                                        </div>
                                    ))
                                }
                            </InfiniteScroll>
                        </div>
                    </div>
                </div>
            </div>
        );
    }
}

export default withRouter(Traineeship);

What can I do so I can eliminate all the request are made when the page is load, I mean this is even worse sending let say 20 request one after another within a second or so.

Any suggestion what is wrong with my code?

Answer 1

by removing useWindow={false} it is working now!