admin管理员组文章数量:1355096
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/fourthviewponent';
import {withRouter} from 'react-router';
import {Bootstrap, Grid, Row, Col, Button, Image, Modal, Popover} from 'react-bootstrap';
import traineeship from './pany.api';
import Header from '../header/headerponent';
import InfiniteScroll from 'react-infinite-scroller';
require('./pany.style.scss');
class Traineeship extends React.Component {
constructor(props) {
super(props);
this.state = {
panies: [],
page: 0,
resetResult: false,
hasMore: true,
totalPages: null,
totalElements: 0,
};
}
ponentDidMount() {
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 panies = Array.from(this.statepanies);
if(response.data._embedded !== undefined){
this.setState({
panies: panies.concat(response.data._embeddedpanies),
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.statepanies.map((traineeship, key) => (
<div id={"item"} key={key}>
<div className={"panyInfo"}>
<div className={"heading"}>
<div id={"panyDiv"}>
<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=".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={"/?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={"panyDescription"}>
<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={"panyContacts"} 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?
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.ponent';
import {withRouter} from 'react-router';
import {Bootstrap, Grid, Row, Col, Button, Image, Modal, Popover} from 'react-bootstrap';
import traineeship from './pany.api';
import Header from '../header/header.ponent';
import InfiniteScroll from 'react-infinite-scroller';
require('./pany.style.scss');
class Traineeship extends React.Component {
constructor(props) {
super(props);
this.state = {
panies: [],
page: 0,
resetResult: false,
hasMore: true,
totalPages: null,
totalElements: 0,
};
}
ponentDidMount() {
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 panies = Array.from(this.state.panies);
if(response.data._embedded !== undefined){
this.setState({
panies: panies.concat(response.data._embedded.panies),
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.panies.map((traineeship, key) => (
<div id={"item"} key={key}>
<div className={"panyInfo"}>
<div className={"heading"}>
<div id={"panyDiv"}>
<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./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./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={"panyDescription"}>
<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={"panyContacts"} 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?
Share Improve this question asked Jun 12, 2018 at 11:01 MizlulMizlul 2,29010 gold badges52 silver badges105 bronze badges 1-
You have to add
dataLengthproperty to be the length of the array you are mapping inside the ponent. – Alen Vlahovljak Commented Dec 6, 2021 at 22:10
2 Answers
Reset to default 5by removing useWindow={false} it is working now!
Update: Haven't seen that you are using react-infinite-scroller. If you want to build the loader yourself, see my previous answer. With the plugin you can set a threshold.
The answer lies in here: Question: Infinite Scrolling
What you basically need to do is to set a variable in state, isLoading: false, and change it when data es in via fetch, when data loading done set it back to false. In your infinite scroll function check (this.state.isLoading).
本文标签： javascriptinfinite scroll not working properly in ReactStack Overflow
版权声明：本文标题：javascript - infinite scroll not working properly in React - Stack Overflow 内容由网友自发贡献，该文观点仅代表作者本人， 转载请联系作者并注明出处：http://www.betaflare.com/web/1743965809a2569864.html， 本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌抄袭侵权/违法违规的内容，一经查实，本站将立刻删除。
发表评论