I want to implement a search bar in my reactJS which takes query in the search bar and show the matching assets from the API with that query till it is finished and rendering it.
import React, { Component } from 'react';
interface ApiResponse {
data: Asset[];
}
interface FetchDataExampleState
{
query: string;
assets: Asset[];
}
// The interface for our Language model.
interface Asset
{
city: string;
country: string;
lane_number: string;
location_uuid: string;
pin: string;
id: BigInt;
}
class Search extends Component<{}, FetchDataExampleState> {
constructor(props) {
super(props)
this.state = {
query: '',
assets: []
}
}
componentDidMount() {
this.serachPeople(this.state.query);
}
onChange(e) {
this.setState({ query: e.target.value }, () => {
if (this.state.query && this.state.query.length > 1) {
if (this.state.query.length % 2 === 0) {
this.serachPeople(this.state.query);
}
} else {
this.serachPeople(this.state.query);
}
})
}
serachPeople(query) {
const url = "/api/locations";
if (query) {
fetch(url, {
method: 'GET'
})
.then(response => response.json() as Promise<ApiResponse>)
.then(data => {
console.log(data.data)
// This is showing 0: {city: "bangalore", country: "india", id: 1, lane_number: "10", location_uuid: "1158", …}
//I have to search for location_uuid and show the row
}
}
render() {
return (
<form>
<input
type="text"
className="search-box"
placeholder="Search for..."
onChange={this.onChange.bind(this)}
/>
{this.state.assets}
</form>
)
}
}
export default Search;
How to render all the matching location_uuids till the last one.
Then render the keys and values of the last one. I am new to ReactJS and tried other solutions. Can anybody help me with this?
Related
I'm trying to pass the data of an Observable retrieved by API request to a component variable in order to display it but I just can't make it work. Please help, here is my code. Regards,
TypeScript Service : Request to API to get Observable
export class ServeurService {
serverCharacter = 'https://cegep.fdtt.space/v1/characters';
serverSecret = 'https://cegep.fdtt.space/v1/secret';
personnages: any[] = [];
persoName = '';
constructor(private http_client: HttpClient) { }
getPersonnage(): Observable<ICharactere[]> {
return this.http_client.get<ICharactere[]>(this.serverCharacter).pipe(retry(4));
}
getAllInfosById(id: string): Observable<ICharactere> {
const myUrl = 'https://cegep.fdtt.space/v1/character/' + id;
return this.http_client.get<ICharactere>(myUrl)?.pipe();
}
setPersonnageName(name: string) {
this.persoName = name;
}
getPersonnageName():string {
return this.persoName;
}
getPersonnages() {
this.http_client.get<any>('https://cegep.fdtt.space/v1/characters').subscribe({
next: (val) => {
val.data.forEach((element: { data: any; }) => {
this.personnages.push(element);
});
}
});
return this.personnages;
}
getPersonnageById(id: string) {
const persoSelectionne = this.getPersonnages().find((x: { id: string; }) => x.id === id);
return persoSelectionne;
}
getPersonnageIdByName(name: string) {
const persoSelectionne = this.getPersonnages().find((n: {name: string; }) => n.name === name);
console.log("perso name service", persoSelectionne)
return persoSelectionne.id;
}
TypeScript Component : Passing the Observable to a variable
export class StatsComponent implements OnInit {
myCharactere!: any;
statLookup = [
{ key: 'str', prefix: $localize`str`, suffix: $localize`enght`, couleur: 'bg-danger' },
{ key: 'dex', prefix: $localize`dex`, suffix: $localize`terity`, couleur: 'bg-primary' },
{ key: 'con', prefix: $localize`con`, suffix: $localize`stitution`, couleur: 'bg-warning' },
{ key: 'int', prefix: $localize`int`, suffix: $localize`elligence`, couleur: 'bg-success' },
{ key: 'sag', prefix: $localize`wis`, suffix: $localize`dom`, couleur: 'bg-info' },
{ key: 'cha', prefix: $localize`cha`, suffix: $localize`risma`, couleur: 'bg-dark' }
];
constructor(public myService: ServeurService) { }
ngOnInit(): void {
this.myService.getAllInfosById(this.myService.getPersonnageIdByName(this.myService.getPersonnageName())).subscribe(result => {
this.myCharactere = result
});
console.log("stats component perso", this.myCharactere)
}
getModifier(stat: number): string {
const mod = Math.floor((stat-10)/2)
return (mod<0)?'-':'+'+ mod.toString();
}
}
HTML : Displaying the variable
<div class="row text-center text-light bg-secondary mt-2 bg-transparent">
<div class="row mt-5">
<div class="col-2" *ngFor="let stat of statLookup">
<div class="{{stat.couleur}} mx-xxl-4 mx-2 mx-md-1 rounded-4">
<div class="fw-bold">{{stat.prefix}}<span class="d-none d-lg-inline">{{stat.suffix}}</span>
</div>
<div class="h2">
{{myCharactere && myCharactere.statistics && myCharactere.statistics[stat.key] ? getModifier(myCharactere.statistics[stat.key]) : ''}}
</div>
<div class="">
{{myCharactere?.data.statistics[stat.key]}}
</div>
</div>
</div>
</div>
If it helps, here is the model too :
export interface ICharactere {
error: string;
data: {
id: string;
name: string;
statistics: { [ key : string ]: number }
race: string;
player: string;
classe : string;
sousclasses: string;
level: number;
background: string;
synopsis: string;
image: string;
health: number;
currentHealth: number;
traits: {
trait: string;
description: string;
}[];
// Should be computed
armorClass: number;
initiative: number;
speed: number;
};
}
You have some fundamental concepts mixed up here. First, you're calling getPersonnages() synchronously and it is making an HTTP call which is an asynchronous operation. I understand what you're trying to do, but if you are going to use observables for your search result, then I suggest you make all of your function calls consistent that way. Here's an example:
getPersonnages(): Observable<any> {
return this.http.get<any>('https://cegep.fdtt.space/v1/characters');
}
getPersonnageIdByName(name: string) {
return new Observable(observer => {
this.getPersonnages().subscribe(
(results => {
observer.next(results.data.find(x => x.name === name))
observer.complete();
})
)
})
}
Now you can search for the ID value you want like this:
this.getPersonnageIdByName("Michel Michaud").subscribe(
(searchResult => {
// here I can get the id
const id = searchResult.id;
})
);
I created a todo list by using react. I get some problem that I want to create checkbox but my checkbox it does not work and I cannot solve :( I don't know what's wrong with that.
I set the data for each task and then I need to change the completed of some task, but it cannot click and change the completed task
This is my code
class App extends React.Component {
constructor() {
super()
this.state = {
todos: todoData,
}
this.handleChange = this.handleChange.bind(this)
}
handleChange(id) {
this.setState(prevState => {
const updatedTodos = prevState.todos.map(todo => {
if(todo.id === id) {
todo.completed = !todo.completed
// console.log(todo.completed)
}
return todo
})
return {
todos: updatedTodos
}
})
}
render() {
const todoItem = this.state.todos.map(item => <TodoItem key={item.id} item={item}
handleChange={this.handleChange}/>)
return (
<div>
<h1 className="header">My Todo Lists</h1>
{todoItem}
</div>
)
}
}
function TodoItem(props) {
let textItem = props.item.completed === true ?
<del>{props.item.text}</del> : props.item.text
return (
<div className="list">
<input
type="checkbox"
checked={props.item.completed}
onChange={() => props.handleChange(props.item.id)}
/>
<p className="item">{textItem}</p>
</div>
)
}
And this is my data
const todoData = [
{
id: 1,
text: "Practice coding",
completed: false
},
{
id: 2,
text: "Grocery shopping",
completed: true
},
{
id: 3,
text: "Wash the dishes",
completed: true
},
{
id: 4,
text: "Take out the trash",
completed: false
},
{
id: 5,
text: "Teach my brother homework",
completed: false
}
]
Thank you for helping :)
Looks like on your handleChange you are mutating the existing state on your map transformation. you must return a new state instead.
Replace your handleChange with the following code:
handleChange(id) {
this.setState((prevState) => {
const updatedTodos = prevState.todos.map((todo) => {
return {
...todo,
completed: todo.id === id ? !todo.completed : todo.completed
};
});
return {
todos: updatedTodos
};
});
}
I'm currently trying to take some JSON data that I've received from an API and put that into a dropdown in a very simple React application.
This is my DropDown component thus far:
import React from 'react';
var values;
fetch('http://localhost:8080/values')
.then(function(res) {
return res.json();
}).then(function(json) {
values = json;
console.log(values);
});
class DropDown extends React.Component {
render(){
return <div className="drop-down">
<p>I would like to render a dropdown here from the values object</p>
</div>;
}
}
export default DropDown;
Any my JSON looks like this:
{
"values":[
{
"id":0,
"name":"Jeff"
},
{
"id":1,
"name":"Joe"
},
{
"id":2,
"name":"John"
},
{
"id":3,
"name":"Billy"
},
{
"id":4,
"name":"Horace"
},
{
"id":5,
"name":"Greg"
}
]
}
I'd like the dropdown options to correspond to the 'name' of each element, and the 'id' to be used as an element identifier when an event is triggered by selecting an option. Any advice on getting this data into a dropdown which responds to user input would be greatly appreciated.
Call the API in componentDidMount lifecycle function of your React component and then save the response in state and then render the Select dropdown
import React from 'react';
class DropDown extends React.Component {
state = {
values: []
}
componentDidMount() {
fetch('http://localhost:8080/values')
.then(function(res) {
return res.json();
}).then((json)=> {
this.setState({
values: json
})
});
}
render(){
return <div className="drop-down">
<p>I would like to render a dropdown here from the values object</p>
<select>{
this.state.values.map((obj) => {
return <option value={obj.id}>{obj.name}</option>
})
}</select>
</div>;
}
}
export default DropDown;
You could do something like this:
import React from 'react';
var values;
class DropDown extends React.Component {
constructor(){
super();
this.state = {
options: []
}
}
componentDidMount(){
this.fetchOptions()
}
fetchOptions(){
fetch('http://localhost:8080/values')
.then((res) => {
return res.json();
}).then((json) => {
values = json;
this.setState({options: values.values})
console.log(values);
});
}
render(){
return <div className="drop-down">
<select>
{ this.state.options.map((option, key) => <option key={key} >{option}</option>) }
</select>
</div>;
}
}
export default DropDown;
Basically you are initializing state and setting options to null.
You are then fetching your options when the component mounts in the browser. These values are set to your state with this.setState().
Note: It is important to make any API calls in componentDidMount() and not componentWillMount(). If you call it in componentWillMount() the request will be made twice.
Then you render these options by mapping them in your render function
JSON FILE: terrifcalculatordata.json
[
{
"id": 1,
"name": "Vigo",
},
{
"id": 2,
"name": "Mercedes",
},
{
"id": 3,
"name": "Lexus",
},
{
"id": 4,
"name": "Buggati",
},
]
CODE:
1st import json file on top:
import calculatorData from "../static/data/terrifcalculatordata.json";
2nd in render method type this code:
<Form>
<FormGroup>
<Input
type="select"
onChange = {this.changeCarmodel}
value={this.state.changeCar}
>
{calculatorData.map((caldata, index) =>
<option
key={index}
value= {caldata.id}
> {caldata.name} </option>
)}
</Input>
</FormGroup>
</Form>
How to render JSON response as dropdown list in React.
export default class ExpenseNew extends Component {
constructor(){
super();
this.state={
PickerSelectedVal : '',
accountnameMain:[],
}
}
componentDidMount(){
var account_nam=[]
fetch('your Url', {
method: 'GET',
headers: { 'Authorization': 'Bearer ' + your token }
})
.then((response) => response.json())
.then((customerselect) => {
// alert(JSON.stringify(customerselect))
global.customerdata = JSON.stringify(customerselect)
var customername = JSON.parse(customerdata);
//alert(JSON.stringify(customername));
for (i = 0; i < customername.cus_data.length; i++) {
var dataa = customername.cus_data[i]["account_name"];
account_nam.push(dataa)
}
this.setState({accountnameMain:account_nam});
})
.done();
}
render() {
return (
<Picker
selectedValue={this.state.PickerSelectedVal}
placeholder="Select your customer"
mode="dropdown"
iosIcon={<Icon name="arrow-down" />}
onValueChange={(itemValue, itemIndex) => this.setState({PickerSelectedVal: itemValue})} >
{this.state.accountnameMain.map((item, key)=>(
<Picker.Item label={item} value={item} key={key}/>)
)}
</Picker>
)
}
}
I'm new in Angular 2 and I'm quite lost. I have a JSON web service responding to /rest/alertsDashboard. It returns something like:
{
"total": {
"totalOperations": 2573,
"totalOperationsAlert": 254,
"totalOperationsRisk": 34
},
"alerts": [
{
codAlert: "L1",
description: "Alert 1",
value: 1
},
{
codAlert: "L2",
description: "Alert 2",
value: 2
},
...
]
}
So I defined a DashboardComponent component and a AlertDashboardService service. I would like, for example, to display totalOperations and totalOperationsAlert. I don't know if I'm doing it in a correct way.
In dashboard.component.ts I have:
...
#Component({
selector: 'app-dashboard',
template: `
<p>{{totalAlertsDashboard.totalOperations}}</p>
<p>{{totalAlertsDashboard.totalOperationsAlert}}</p>
...
`
})
export class DashboardComponent implements OnInit {
totalAlertsDashboard: TotalAlertsDashboard;
alertsDashboard: AlertDashboard[];
constructor(private alertsDashboardService: AlertsDashboardService) { }
ngOnInit() {
this.alertsDashboardService.get().then(
response => {
this.totalAlertsDashboard = response.totalAlertsDashboard;
this.alertsDashboard = response.alertsDashboard;
}
);
}
}
In alerts-dashboard.service.ts I have:
...
export class AlertsDashboard {
totalAlertsDashboard: TotalAlertsDashboard;
alertsDashboard: AlertDashboard[];
}
export class TotalAlertsDashboard {
totalOperations: number;
totalOperationsAlert: number;
totalOperationsRisk: number;
}
export class AlertDashboard {
codAlert: string;
description: string;
value: number;
}
#Injectable()
export class AlertsDashboardService {
private headers = new Headers({ 'Content-Type': 'application/json' });
private url = environment.urlAPI + '/rest/alertsDashboard';
constructor(private http: Http) { }
get(): Promise<AlertsDashboard> {
var vm = this;
let params = new URLSearchParams();
return vm.http.get(vm.url, { search: params })
.toPromise()
.then(response => {
var responseJson: AlertsDashboard = response.json() ;
console.log(responseJson); // it prints the JSON correctly
return responseJson;
});
}
}
I hope you can help me with that.
try this :
ngOnInit() {
this.alertsDashboardService.get().then(
response => {
this.totalAlertsDashboard = response.total;
this.alertsDashboard = response.alerts;
}
);
}
In alerts-dashboard.service.ts
export class AlertsDashboard {
total: TotalAlertsDashboard;
alerts: AlertDashboard[];
}
template :
<p>{{totalAlertsDashboard?.totalOperations}}</p>
What I need to do is when i enters text inside textbox , i need to filter result inside li
I need do same as here
but this is done using ajax and i need to do using angular2 with data loading from .json file
my index.html is
<div id="search-container">
<div class="search" id="search-btn"></div>
<input #searchBox id="search" type="text" name="search-input" (keyup)="search(searchBox.value)">
<ul class="data-ctrl">
<li ng-repeat="i in items >i[0].name</li>
</ul>
</div>
My app.component.ts is
constructor(public http: Http,public _dmcService: DmcService) {
this._dmcService.getData('prc').subscribe(
data => { this.listingval= "prc"; this.assignJson(data); }
);
}
assignJson function from app.component.ts:
here i assigned data to heroes which is loaded from json file
assignJson(data: any) {
displayContent= data.teacher[0].libraryItems;
for (var i = 0; i <displayContent.length; i++) {
this.heroes[i] = [
{ id: i, name: data.teacher[0].libraryItems[i].display_title.slice(30)}
];
}
}
dmc.service.ts:
getData(filename: string) {
return this.http.get('assets/data/' + filename + '.json').map((res: Response) => res.json());
}
prc.json:
{
"isbn": "9781328694829",
"teacher": [
{
"component": "Core Resources",
"libraryItems": [
{
"id": "9781328694829-00001",
"display_title": "Practice- Ungroup from the Left or from the Right"
},
{
"id": "9781328694829-00002",
"display_title": "Reteach- Ungroup from the Left or from the Right",
}
]
}
}
search function in app.component.ts:
search(term: string): void {
this.searchTerms.next(term);
}
ngOnInit(): void {
let heroes: Observable<Hero[]>;
this.heroes = this.searchTerms
.debounceTime(300) // wait for 300ms pause in events
.distinctUntilChanged() // ignore if next search term is same as previous
.switchMap(term => term // switch to new observable each time
// return the http search observable
? this.heroSearchService.search(term)
// or the observable of empty heroes if no search term
: Observable.of<Hero[]>([]))
.catch(error => {
// TODO: real error handling
console.log(error);
return Observable.of<Hero[]>([]);
});
}
my heroesSearchService is as
#Injectable()
export class HeroSearchService {
constructor(private http: Http) {}
search(term: string): Observable<Hero[]> {
console.log('term:: ',term);
var str = this.http.get(`app/heroes/?name=${term}`)
.map((r: Response) => r.json().data as Hero[]);
return str;
}
}
export class Hero {
id: number;
name: string;
}
my current code not working, can anyone please help me with this.