We Keep Coding

Using useEffect like ComponentDidUpdate

I am trying to have 3 buttons where if one is in an active state, the other 2 will automatically be inactive.
if (isActive === "true") {
setActive2("false")
setActive3("false")
}
if (isActive2 === "true") {
setActive("false")
setActive3("false")
}
if (isActive3 === "true") {
setActive("false")
setActive2("false")
}
I'm aware there's probably a better way of doing this and this is a brute force option, and I'm open to your suggestions.
I have tried putting this block of code in a function and running it whenever the buttons are clicked, but that is giving me the previous state instead of the current state.
So I was suggested to use the useEffect hook.
useEffect(() => {
if (isActive === "true") {
setActive2("false")
setActive3("false")
}
if (isActive2 === "true") {
setActive("false")
setActive3("false")
}
if (isActive3 === "true") {
setActive("false")
setActive2("false")
}
}, [isActive, isActive2, isActive3]);
However this is giving me the same issue, where the previous state is being applied.
I am for sure doing something very wrong with this hook (i have never used it before).
I have a codesandbox with all my code here

Have modified only the onChange handler in an efficient way without touching JSX much and have worked on your set-up only. CodeSandBox Link Checkbox-Selection
Some Major changes that I did are as follows:
Instead of setting seperate state to each button, I have used a single object with 3 keys isActive, isActive2 and isActive3.
const [btnStatus, setBtnStatus] = useState({
isActive: true,
isActive2: true,
isActive3: true
});
Your Handler looks something like this now.
const addPizza = (e) => {
setPizzaSize(e.target.name);
setStartPrice(parseInt(e.target.value));
const currentActive = e.target.id;
if (currentActive === "isActive") {
setBtnStatus({ isActive: true, isActive2: false, isActive3: false });
console.log("1");
}
if (currentActive === "isActive2") {
setBtnStatus({ isActive: false, isActive2: true, isActive3: false });
console.log("2");
}
if (currentActive === "isActive3") {
setBtnStatus({ isActive: false, isActive2: false, isActive3: true });
console.log("3");
}
console.log(btnStatus);
};
In your JSX each button will look like this, with own ids to track the status of button.
<button
name="Extra Large"
className={
btnStatus.isActive3
? "button btn fourth"
: "button btn fourthActive"
}
value="20"
onClick={addPizza}
id="isActive3"
>
Extra large
</button>
And here you go. All working nicely with the same code :)

I have update the code a little bit, you can create seprate constants and use them to reduce the code and also, to keep the active state use a single state only.
https://codesandbox.io/s/gracious-franklin-m8wkx?file=/src/CYO.js:0-4147
import React, { useState, useEffect } from "react";
import ButtonClickable from "./button";
import ButtonClickable2 from "./button2";
import { burgerSize, vegToppings, nonvegToppings } from "./const/size";
import "./index.css";
const CYO = () => {
const [pizzaSize, setPizzaSize] = useState("Choose your Pizza Size");
const [activeSize, setActiveSize] = useState(burgerSize.MEDIUM);
const [toppings, setToppings] = useState([]);
const [startPrice, setStartPrice] = useState(0);
const addPizza = (e) => {
setPizzaSize(e.target.name);
setStartPrice(parseInt(e.target.value));
};
const CheckSize = () => {
if (pizzaSize === "Choose your Pizza Size") {
alert("You must choose a pizza size");
} else if (toppings.length === 0) {
alert("Are you sure you don't want toppings?");
} else {
alert("Sorry, this isn't a real pizza place.");
}
};
const ToppingPlusMinus = (e) => {
const { value } = e.target;
const position = toppings.indexOf(value);
if (position !== -1) {
return removeTopping(value);
}
return addTopping(value);
};
const removeTopping = (value) => {
// We need to filter out the value from the array and return the expected new value
setToppings(toppings.filter((topping) => topping !== value));
//handleToggle();
};
const addTopping = (value) => {
setToppings([...toppings, value]);
// handleToggle();
};
let toppingPrice = toppings.length * 1.5;
let price = startPrice + toppingPrice;
return (
<div className="container CYO">
<h2 className="text-center white">Create your own pizza</h2>
<div className="row">
<div className="col-sm-8">
<div className="">
<img
src="./pizza.png"
className="img-fluid pizza"
alt="Pizza"
></img>
</div>
<h3 className="white">{pizzaSize}</h3>
<p className="white">
Your Toppings: <br />
<div className="col-lg-12">
{toppings
.filter((x) => x.name !== "")
.map((toppings) => (
<img
src={toppings}
alt="topping"
width="100px"
height="100px"
></img>
))}
</div>{" "}
</p>
</div>
<div className="col-sm-4">
<h3 className="white">Pizza size</h3>
{Object.values(burgerSize).map((value) => (
<button
name={value}
className={
activeSize !== value
? "button btn fourth"
: "button btn fourthActive"
}
value="10"
onClick={(event) => {
addPizza(event);
setActiveSize(value);
}}
>
{value}
</button>
))}
<br />
<h3 className="white">Toppings</h3>
<p className="white">Toppings are $1.50 each</p>
<div className="topping-wrapper">
<h4 className="white">Meats</h4>
{nonvegToppings.map(({ name, image }) => (
<ButtonClickable
onClick={(event) => {
ToppingPlusMinus(event);
}}
name={name}
value={image}
/>
))}
<h4 className="white">Veggies</h4>
{vegToppings.map(({ name, image }) => (
<ButtonClickable2
onClick={(event) => {
ToppingPlusMinus(event);
}}
name={name}
value={image}
/>
))}
</div>
</div>
<div className="pricefooter">
<p className="price">Price: ${price}</p>
</div>
<div className="pricefooter2">
<button className="checkout button btn fourth" onClick={CheckSize}>
Checkout
</button>
</div>
</div>
</div>
);
};
export default CYO;

Show contents of array in render

I am using MERN stack and Redux. I have created an array in the state 'comments' which is updated via the clickHandler function with elements from the global state (accessed via props). When i try to show the contents of the array in the render i just get the length of it. How would i show the properties of the elements for example title.
import React, { Component } from "react";
import PropTypes from "prop-types";
import GoogleSearch from "./GoogleSearch";
import { connect } from "react-redux";
import { fetchSubjects } from "../../actions/subject";
import { fetchComments } from "../../actions/comment";
import store from "../../store";
class Subject extends Component {
// on loading the subjects and comments
// are fetched from the database
componentDidMount() {
this.props.fetchSubjects();
this.props.fetchComments();
}
constructor(props) {
super(props);
this.state = {
// set inital state for subjects description
// and summary to invisible
viewDesription: -1,
viewSummary: -1,
comments: [],
};
}
componentWillReceiveProps(nextProps) {
// new subject and comments are added to the top
if (nextProps.newPost) {
this.props.subjects.unshift(nextProps.newPost);
}
if (nextProps.newPost) {
this.props.comments.unshift(nextProps.newPost);
}
}
clickHandler = (id) => {
// when a subject title is clicked pass in its id
// and make the desciption visible
const { viewDescription } = this.state;
this.setState({ viewDescription: viewDescription === id ? -1 : id });
// clear the existing comments in state
this.setState({
comments: [],
});
// loop through the comment items in the global state
// and add any with the same subjects id passed in to the array
var i;
for (i = 0; i < this.props.comments.length; i++) {
if (this.props.comments[i].subject == id) {
console.log(this.props.comments[i]);
this.setState({
comments: this.state.comments.unshift(this.props.comments[i]),
});
}
} // set local storage to the id for the subject that has been clicked
localStorage.setItem("passedSubject", id);
};
// hovering on and off subjects toggles the visibility of the summary
hoverHandler = (id) => {
this.setState({ viewSummary: id });
};
hoverOffHandler = () => {
this.setState({ viewSummary: -1 });
};
render() {
const subjectItems = this.props.subjects.map((subject) => {
// if the state equals the id set to visible if not set to invisible
var view = this.state.viewDescription === subject._id ? "" : "none";
var hover = this.state.viewSummary === subject._id ? "" : "none";
var comments = this.state.comments;
return (
<div key={subject._id}>
<div
className="subjectTitle"
onClick={() => this.clickHandler(subject._id)}
onMouseEnter={() => this.hoverHandler(subject._id)}
onMouseLeave={() => this.hoverOffHandler()}
>
<p className="title">{subject.title}</p>
<p className="rating">Rating: {subject.rating}</p>
<p className="summary" style={{ display: hover }}>
{subject.summary}
</p>
</div>
<div className="subjectBody " style={{ display: view }}>
<div className="subjectAuthor">
<p className="author">
Subject created by: {subject.author} on {subject.date}
</p>
<a href="">
<div className="buttonRateSubject">RATE SUBJECT</div>
</a>
</div>
<div className="subjectDescription">
<p className="description">{subject.description}</p>
</div>
<div className="subjectLinks">Links:</div>
<div className="subjectComments">
<p>Comments:</p>
{/* ************HERE*********** */}
<p>{comments}</p>
{/* ********************************* */}
<a href="/addcomment">
<div className="buttonAddComment">ADD COMMENT</div>
</a>
</div>
</div>
</div>
);
});
return (
<div id="Subject">
<GoogleSearch />
{subjectItems}
</div>
);
}
}
Subject.propTypes = {
fetchSubjects: PropTypes.func.isRequired,
fetchComments: PropTypes.func.isRequired,
subjects: PropTypes.array.isRequired,
comments: PropTypes.array.isRequired,
newPost: PropTypes.object,
};
const mapStateToProps = (state) => ({
subjects: state.subjects.items,
newSubject: state.subjects.item,
comments: state.comments.items,
newComment: state.comments.item,
});
// export default Subject;
export default connect(mapStateToProps, { fetchSubjects, fetchComments })(
Subject,
Comment
);

I think I know your problem. You want to render items of an array.
Let me just give you a short overview.
Javascript:
this.setState({
comments: data
});
render (){
return (
<div>
{ this.state.comments.map(c=> <div>{c.body}</div> ) }
</div>
)
}

Thanks guys, i changed the for loop in the clickHandler to this which now has data rendering, it didn't like objects in the array for some reason.
var temp = [];
for (i = 0; i < this.props.comments.length; i++) {
if (this.props.comments[i].subject == id) {
console.log(this.props.comments[i]);
temp.unshift(this.props.comments[i].comment);
temp.unshift(this.props.comments[i].title);
}
}
this.setState({
comments: temp,
});

ReactJS: Reset-Render Child Component on Parent state change

I have a strange - at least for me :-) - issue with my Components.
I have a map() function generating a list of Child elements. When I change the filter and the list repopulates the state of the children remain as it was. For example, if the second Alumni Child Component has state {height:auto} the new second Allumni Child has again {height: auto}.
I find it really odd because this is not the same element, it's a new element corresponding to another person, with new content passed through props.
Long story short how do I force my new Child elements to have initial state {height: 0}?
There is a lot of details hidden but the core of my Parent App is as follows:
class App extends React.Component {
constructor(props) {
super(props);
this.state = {
filterName: "",
filterInitial: "Α",
....
filteredGraduates:[],
loaderVisible:true
};
this.updateInitial = this.updateInitial.bind(this)
...
}
componentDidMount(){
...
}
updateInitial(letter) {
if (letter==='*'){
this.setState({
filterInitial: "*",
filteredGraduates : [...graduates]
})
}else{
this.setState({
filterInitial: letter,
filteredGraduates : graduates.filter( (graduate) => graduate.Surname.charAt(0)===letter )
})
}
console.log('this is the letter: ',letter);
}
render() {
return (
<div className="app">
<div className="filters">
<div className="name-pagination">
<span
onClick={ () => this.updateInitial('*')}
className={'*'==this.state.filterInitial? 'active': ''}
>Α - Ω
</span>
<hr/>
{letters.map( (letter) => {
return(
<span
onClick={ () => this.updateInitial(letter)}
className={letter==this.state.filterInitial? 'active': ''}
>{letter}</span>
)
}
)}
</div>
</div>
</div>
{this.state.loaderVisible && <Loader /> }
{!this.state.loaderVisible && <div className="graduates-wrapper">
{this.state.filteredGraduates
.sort( (x,y) => x.Surname.localeCompare(y.Surname) )
.map( (graduate) => {
return(
<div>
<Allumni
key={graduate.id}
.... a lot of props ...
/>
</div>
)
})
}
</div>}
</div>
);
}
}
and my Child is:
class Allumni extends React.Component {
constructor(props) {
super(props);
this.state = {
height:0
};
this.updateHeight = this.updateHeight.bind(this)
}
updateHeight() {
this.setState({
height: this.state.height === 0 ? 'auto' : 0,
});
};
render() {
const {
name,
surName,
.......
} = this.props
return (
<div className="allumni-wrapper">
<div className="allumni-main-info">
<span className="allumni-surname">{surName}</span><br/><span className="allumni-name">{name}</span>
</div>
<div className="allumni-extra">
<span className="allumni-year">{yearOf}</span><br/>
<span className="allumni-job">{job}</span> / <span className="allumni-home-city">{homeCity}</span>
</div>
<div className="allumni-details">
<AnimateHeight
duration={ 500 }
height={ this.state.height }
>
<p><span className="attribute-name">... {fatherName}</p>
<p><span className="attribute-name">...{studies}</p>
....
</AnimateHeight>
</div>
<div className="allumni-actions" onClick={this.updateHeight}>
<AccountCardDetailsOutlineIcon size={30}/>
<span className={'actions-toggle ' + (this.state.height >= 0 ? '' : 'rotated') }><ChevronDownIcon/></span>
</div>
</div>
);
}
}
export default Allumni
thank you

React & Redux: "form submission canceled because the form is not connected"

I am still new in React and Redux. So, I know the existence of redux-form, but Im not intend to use in this project. So, what I am doing is creating a form without using redux-form. This form will grab the data from the reducers and pass it to backend API.
This is my main CreateListing.jsx page.
// #flow
import React from 'react';
import { connect } from 'react-redux';
import { Helmet } from 'react-helmet';
import { SEOService } from '[services]';
import CreateListingFormPage1 from './CreateListing/CreateListingFormPage1';
import CreateListingFormPage2 from './CreateListing/CreateListingFormPage2';
import CreateListingFormPage3 from './CreateListing/CreateListingFormPage3';
import WhereAmI from './CreateListing/WhereAmI';
import SuccessCreateListing from './CreateListing/SuccessCreateListing';
type Props = {
...props...
};
class CreateListing extends React.Component<Props> {
getPageBySequence(pagenum) {
// depending on whether User is logged in or not, show/hide the Login/Signup form which is Page3
let sequence = [ CreateListingFormPage1, CreateListingFormPage2, CreateListingFormPage3 ];
if (this.props.isLoggedIn) {
sequence = [ CreateListingFormPage1, CreateListingFormPage2, CreateListingFormPage2 ];
}
return sequence[pagenum-1];
}
getSubmitCreateListing = (e) => {
e.preventDefault();
const propertyType = this.props.listingType;
const propertyName = this.props.suggestedBuildings.selected;
const propertyBuildingType = this.props.propertyBuildingType;
const bedrooms = this.props.bed;
const bathrooms = this.props.bath;
const price = this.props.price;
const builtUp = this.props.builtUp;
const title = this.props.title;
const tenure = this.props.tenure;
const description = this.props.description;
/* IN CASE USER NOT YET LOGGGED IN */
if(this.props.isLoggedIn === false) {
const email = this.props.email;
const password = this.props.password;
this.props.cacheCreateListing({ email, password, propertyType, propertyName, propertyBuildingType, bedrooms, bathrooms, price, builtUp, title, tenure, description });
}
this.props.cacheCreateListing({ propertyType, propertyName, propertyBuildingType, bedrooms, bathrooms, price, builtUp, title, tenure, description });
if(CreateListingFormPage1.landedTypes.includes(propertyBuildingType)) {
this.props.geocodingRequired(true);
}
else {
this.props.geocodingRequired(false);
}
this.props.onSubmitCreateListing();
}
onAuthenticateAndCreateListingButton() {
if(this.props.isLoggedIn) {
return(
<div role="presentation">
<div className={`column ${this.props.formCurrentPage === 1 ? '':'displayNone'}`}>
<button type="button" className="Button button-next is-red" onClick={this.props.onNextClick}>
NEXT
</button>
</div>
<div className={`column ${this.props.formCurrentPage === 2 || this.props.formCurrentPage === 3 ? '':'displayNone'}`}>
<button type="submit" className="Button button-create is-red" onClick={this.props.onLoadingCreateListing}>
CREATE LISTING
</button>
</div>
</div>
)
}
return <div className={`column ${this.props.formCurrentPage < 3 ? '':'displayNone'}`}>
<button type="button" className="Button button-next is-red" onClick={this.props.onNextClick}>
NEXT
</button>
</div>
}
render() {
if(this.props.isListingCreated){
return <SuccessCreateListing />;
}
else if(this.props.isListingLoading){
return <div className="create-listing-spinner" />
}
const CurrentPage = this.getPageBySequence(this.props.formCurrentPage);
return (
<div className={`CreateListing${this.props.isMobile ? '' : ' is-desktop'}`}>
<Helmet>
<title>{ SEOService.getMetaTitle('Create Property Listing') }</title>
{ SEOService.getCanonicalTag('/blogs') }
</Helmet>
<section className="CreateListing--Main">
<div className="CreateListing--Container">
<div className="CreateListing--WhereAmI">
<WhereAmI page={this.props.formCurrentPage} />
</div>
<div className="CreateListing--Body">
<form className="CreateListing--Form" onSubmit={ this.getSubmitCreateListing }>
<CurrentPage />
<div className='columns'>
<div className='column'/>
{/* CHANGE THIS this.props.formCurrentPage < 3 later */}
<div className={`column ${this.props.formCurrentPage > 1 && this.props.formCurrentPage < 4 ? '':'displayNone'}`}>
<button type="button" className="Button button-back" onClick={this.props.onPrevClick}>
BACK
</button>
</div>
{ this.onAuthenticateAndCreateListingButton() }
<div className='column'/>
</div>
</form>
</div>
</div>
</section>
</div>
);
}
};
const MapStateToProps = (state: State) => ({...});
const MapDispatchToProps = (dispatch: Dispatch) => ({
onLoadingCreateListing: () => dispatch({type: 'CREATE_LISTING_LOADING'}),
onSubmitCreateListing: () => dispatch({type: 'CREATE_LISTING_SUBMIT_FORM'}),})
export default connect(MapStateToProps,MapDispatchToProps)(CreateListing);
So, my <input type="text" /> are all from CreateListingFormPage1, CreateListingFormPage2 and CreateListingFormPage3 and put together in <CurrentPage />. My <form onSubmit={...}></form> is in this CreateListing.jsx page. Im not whether it is allowed to do it like this.
So, when I click submit, I got warning of Form submission canceled because the form is not connected.
My example of <input type="" /> in CreateListingFormPage1 are:
// #flow
import React from 'react';
import { connect } from 'react-redux';
import {Dropdown} from '[elements]';
type Props = {...props...};
class CreateListingFormPage2 extends React.Component<Props> {
static get selectTenure() { return ["Select Tenure"].concat(this.tenureTypes) };
static get selectTitle() { return ["Select Title"].concat(this.titleTypes) };
static get selectBedroom() { return["Select Bedrooms no"].concat(this.bedroomNo) };
static get selectBathroom() { return["Select Bathrooms no"].concat(this.bathroomNo) };
static get tenureTypes(){
return[
"FREEHOLD",
"LEASEHOLD",
"OTHERS"
]};
static get titleTypes(){
return[
"RESIDENTIAL",
"COMMERCIAL",
"INDUSTRIAL"
]};
static get bedroomNo(){
return[
"1",
"2",
"3",
"4",
"5"
]};
static get bathroomNo(){
return[
"1",
"2",
"3",
"4",
"5"
]};
get selectTenure() { return this.constructor.selectTenure; }
get selectTitle() { return this.constructor.selectTitle; }
get selectBedroom() { return this.constructor.selectBedroom; }
get selectBathroom() { return this.constructor.selectBathroom; }
get tenureTypes() { return this.constructor.tenureTypes; }
get titleTypes() { return this.constructor.titleTypes; }
get bedroomNo() { return this.constructor.bedroomNo; }
get bathroomNo() { return this.constructor.bathroomNo; }
hasInputError = (name) => {
if (this.props.errors[name]) {
return ' is-error';
}
return '';
}
render() {
return (
<div className={`Listing--Create${ this.props.isMobile ? '' : ' is-desktop' }`} id='form-second-page'>
{/* <form className="Listing--form"> */}
<div className="Listing--bedrooms-bathrooms">
<div className="type-title">No. of Bedrooms</div>
<Dropdown namespace="bedroom" selected={ this.selectBedroom[0] } options={ this.selectBedroom } onOptionSelect={ this.onBedroomDropdownSelect }/>
<div className="type-title">Asking Price</div>
<input className={`text-input price-input${ this.hasInputError('price')}`} type="text" onChange={ (e) => this.props.onPrice(e.currentTarget.value) } value={this.props.price} placeholder="RM"/>
</div>
<div className="Listing--price-built-up">
<div className="type-title">No. of Bathrooms</div>
<Dropdown namespace="bathroom" selected={ this.selectBathroom[0] } options={ this.selectBathroom } onOptionSelect={ this.onBathroomDropdownSelect }/>
<div className="type-title">Built-up Size</div>
<input className={`text-input built-up-input${ this.hasInputError('built_up_size')}`} type="text" onChange={ (e) => this.props.onBuiltUpSize(e.currentTarget.value) } value={this.props.builtUp} placeholder="sqft."/>
</div>
<div className="Listing--tenure">
<div className="type-tenure">Select Tenure</div>
<Dropdown namespace="tenure" selected={ this.selectTenure[0] } options={ this.selectTenure } onOptionSelect={ this.onTenureDropdownSelect }/>
</div>
<div className="Listing--title">
<div className="type-title">Select Title</div>
<Dropdown namespace="title" selected={ this.selectTitle[0] } options={ this.selectTitle } onOptionSelect={ this.onTitleDropdownSelect }/>
</div>
<div className="Listing--photos">
<div className="type-title">Upload Photos</div>
<button className={`text-input photos-input${ this.hasInputError('photos')}`}>Click to upload</button>
</div>
<div className="Listing--description">
<div className="type-title">Describe your property</div>
<textarea className={`text-input description-input${ this.hasInputError('description')}`} onChange={ (e) => this.props.onDescription(e.currentTarget.value) } value={this.props.description} placeholder="Describe your property"/>
</div>
</div>
);
}
};
const MapStateToProps = (state: State) => ({
...
});
const MapDispatchToProps = (dispatch: Dispatch) => ({
...
})
export default connect(MapStateToProps, MapDispatchToProps)(CreateListingFormPage2);
Basically, there is nothing wrong with my redux store. All the value of the input is captured successfully. The problem is when submitting the form, either the onSubmit or my form structure method is incorrect.
This is CreateListing.js reducer should it be helpful:
const INITIAL_STATE= {
isListingLoading: false,
isListingCreated: false,
}
const CreateListing = (state = INITIAL_STATE, action) => {
switch(action.type){
case 'CREATE_LISTING_LOADING':
return Object.assign({}, state, {isListingLoading: true});
case 'CREATE_LISTING_SUBMIT_FORM':
return Object.assign({}, state, {isListingCreated: true});
default:
return state;
} }
export default CreateListing;
Any help is much appreciated.

if you have any other buttons in your form you should add type="button".
so make changes like this.
<button type="button" className="Button button-create is-red" onClick={this.props.onLoadingCreateListing}>
CREATE LISTING
</button>

Search functionality in reactjs

import React, { PropTypes } from 'react';
import { Link, browserHistory } from 'react-router';
import * as DataConnectionAction from '../../actions/dataconnectionAction.jsx';
import DataConnectionStore from '../../store/dataconnectionstore.jsx';
class DataSource extends React.Component {
constructor(props) {
super(props);
this.state = {
datasourcelist: [],
};
this._dataconnectionStoreChange = this._dataconnectionStoreChange.bind(this);
}
componentWillMount() {
DataConnectionStore.on('change', this._dataconnectionStoreChange);
}
componentWillUnmount() {
DataConnectionStore.removeListener('change', this._dataconnectionStoreChange);
}
componentDidMount() {
DataConnectionAction._getDataSourcesList();
}
_dataconnectionStoreChange(type) {
if (type == 'DataSourcesList') {
let datasourcelist = DataConnectionStore._getDataSourceList() || {};
this.setState({ datasourcelist: datasourcelist.dataconnections });
}
}
DataSourceView(el) {
let data = {
id: el.dataConnectionName
}
}
_handleSearchChange(e) {
let value = e.target.value;
let lowercasedValue = value.toLowerCase();
let datasourcedata = this.state.datasourcelist;
let datasourcelist = datasourcedata && datasourcedata.filter(el => el.dataConnectionName.toLowerCase().includes(lowercasedValue));
this.setState({ datasourcelist });
}
DataSourcesCardUI() {
let datasourcedata = this.state.datasourcelist;
return (
datasourcedata && datasourcedata.map((el) =>
<div key={el.key}>
<div className="col-md-3 topadjust">
<div className="panel panel-default datasource_panel ">
<div className="panel-heading">
<h5 className="panel_title"><i className="fa fa-database"></i> {el.dataConnectionName}</h5>
</div>
<Link className="panel-body" onClick={this.DataSourceView.bind(this, el)}>
<div className="datasource_txt text-center">
<h6>{el.databaseHost}</h6>
<h6>{el.dataConnectionType} </h6>
<p>{el.createdDate}</p>
</div>
</Link>
</div>
</div>
</div>
)
);
}
render() {
return (
<div>
<section className="content_block">
<div className="container-fluid">
<div className="row dashboard_list">
{this.DataSourcesCardUI()}
</div>
</div>
</section>
</div>
);
}
}
export default DataSource;
Here I am getting one issue, that is I can able to filter based on the dataConnectionName, but when I am trying to filter with change of name it is filtering from the first filter array data.
But, I need to filter based on data array if i remove and type again.
Example:
when I tried search with Cu I am getting properly. but again when i remove Cu and search for User It is not searching from data array It is searching from filter array data. Instead of that when i remove and search with other key it should get filtered from data array.
Please Guide me what i am doing wrong.

Instead of overwriting the data in your state, you could keep a separate array in which you put all the elements that match the search.
Example
let data = [
{
dataConnectionName: "Customer_Details",
dataConnectionType: "NO_SQL",
databaseHost: "17.8.10.26",
pluginName: "AGT1_Customer_Details",
createdDate: "2018-09-23",
createBy: "Admin"
},
{
dataConnectionName: "User_Details",
dataConnectionType: "NO_SQL",
databaseHost: "17.8.10.26",
pluginName: "AGT1_Customer_Details",
createdDate: "2018-09-24",
createBy: "Admin"
},
{
dataConnectionName: "Manager_Details",
dataConnectionType: "NO_SQL",
databaseHost: "17.8.10.26",
pluginName: "AGT1_Customer_Details",
createdDate: "2018-09-25",
createBy: "Admin"
},
{
dataConnectionName: "Director_Details",
dataConnectionType: "NO_SQL",
databaseHost: "17.8.10.26",
pluginName: "AGT1_Customer_Details",
createdDate: "2018-09-26",
createBy: "Admin"
}
];
// Give each element a unique id that is used as key
data.forEach(el => el.id = Math.random());
class App extends React.Component {
state = {
data,
filteredData: data
};
_handleSearchChange = e => {
const { value } = e.target;
const lowercasedValue = value.toLowerCase();
this.setState(prevState => {
const filteredData = prevState.data.filter(el =>
el.dataConnectionName.toLowerCase().includes(lowercasedValue)
);
return { filteredData };
});
};
render() {
const { filteredData } = this.state;
return (
<div>
<input onChange={this._handleSearchChange} placeholder="Search"/>
{filteredData.map(el => (
<div key={el.key}>
<div>
{el.dataConnectionName} - {el.pluginName} - {el.createdDate} - {el.createBy}
</div>
</div>
))}
</div>
);
}
}
ReactDOM.render(<App />, document.getElementById("root"));
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<div id="root"></div>