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Get Value from a Input field Angular With Code

I want to take values from input to a function to alert
here is my html
<div class="container p-5 ">
<input #titleInput *ngIf="isClicked" type="text" class="col-4"><br>
<button (click)="OnClick()" class="btn btn-primary col-2 ">
Show
</button>
<button (click)="Send(titleInput.value)" class="btn btn-success col-2 m-3">
Send
</button>
</div>
and here is my componet.ts
import { Component} from '#angular/core';
#Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
Send(data: any) {
alert(data)
}
OnClick() {
this.isClicked=true;
}
title = 'demoproject1';
isClicked=false;
}
I want to get value from input field and I want get value into components function

Create Variable to store input value:
component.ts
...
export class AppComponent {
input: string;
...
Add FormsModule to your module.ts if not already imported
module.ts
import { FormsModule } from '#angular/forms';
setup ngModel on your HTML:
html:
<input type="text" [(ngModel)]="input" ></-input>
Important:
Dont forget to add a Route to the component in your app-routing.module.ts
ngModel Docs

#ViewChild('titleInput') titleInput:
ElementRef;
ngAfterViewInit() {
// Put your logic here ...
}
i put the code here :
https://stackblitz.com/edit/angular-ivy-b4hcqw?file=src%2Fapp%2Fapp.component.ts,src%2Fapp%2Fapp.component.html

My offerflow is Angular11, can't get value 1 or 2 in html

My task: The received value from service 1 or 2, depending on the value, change the styles in the html component. Using the ng-switch directive, I expect to compare the value received from the object with the specified template value. Styles are not applied. The main problem is that the styles are not applied
My component:
import { ChangeDetectionStrategy, Component, EventEmitter, Input, Output, Self } from '#angular/core';
import { ConfigService, IProductListItem, SliderValueOptions } from 'common-modules';
import { Router } from '#angular/router';
import { debounceTime, filter, takeUntil, tap } from 'rxjs/operators';
import { NgOnDestroy } from '../../core/services/destroy.service';
import { BehaviorSubject } from 'rxjs';
import { OnInit, OnDestroy } from '#angular/core';
#Component({
selector: 'app-product-item',
templateUrl: './product-item.component.html',
styleUrls: ['./product-item.component.scss'],
changeDetection: ChangeDetectionStrategy.OnPush,
providers: [NgOnDestroy],
})
export class ProductItemComponent implements OnInit, OnDestroy {
#Input() product: IProductListItem;
#Input() doubleClickEnabled: boolean;
// tslint:disable-next-line:no-output-on-prefix
#Output() onAddToCart = new EventEmitter<any>();
themeProperties: number;
visibility: boolean = false;
constructor(private _router: Router, private _config: ConfigService, #Self() private onDestroy$: NgOnDestroy) {}
ngOnInit() {
this._config.marketplaceConfig.pipe(takeUntil(this.onDestroy$)).subscribe((config) => {
this.themeProperties = config.structure?.theme;
});
}
}
My html:
<mat-card class="card">
<div [ngSwitch]="themeProperties">
<ng-template *ngswitchcase="2">
{{ themeProperties }}
<mat-card id="cardbackground">
<a class="card__link" (click)="redirectToProduct(product)" (dblclick)="doubleClicked(product)">
<div
style="display: none"
class="card__promo"
*ngIf="product.priceWithDiscount && product?.promoIndividual?.percentDiscount"
>
-{{ product?.promoIndividual?.percentDiscount }}%
</div>
<!-- <b2b-modern-image mat-card-image [src]="product.photos[0]"></b2b-modern-image> -->
<img class="mat-card-image" [src]="product.photos" alt="" />
<mat-card-content class="card__content" [class.has-padding-top]="product && product['discount']">
<div class="super-sale">супер скидка</div>
<div *ngIf="product && product['discount']" class="discount">-{{ product['discount'] }}%</div>
<div
*ngIf="product && product.promoIndividual && product?.promoIndividual?.percentDiscount"
class="discount"
>
-{{ product?.promoIndividual?.percentDiscount }}
%
</div>
<ng-template #defaultPrice>
<!-- <span class="price">{{product.price}} ₽</span>-->
</ng-template>
<div class="rating">
<ngx-stars color="#ffd700" [readonly]="true" [initialStars]="product.rating || 0"> </ngx-stars>
<span class="ml-3">{{ product.views || 0 }} отзывов</span>
</div>
<h3 class="name wrap-two-line" [matTooltip]="product?.feed" matTooltipPosition="above">
{{ product | localize: 'name' }}
</h3>
<div class="а">
<div
class="d-flex align-items-center"
*ngIf="product.priceWithDiscount && product.priceWithDiscount != product.price; else defaultPrice"
>
<span class="price old">{{ product.price }}₽</span>
</div>
<p class="price">{{ (product.priceWithDiscount || 0).toFixed(1) }}₽</p>
</div>
</mat-card-content>
</a>
<mat-card-footer class="card__footer">
<a routerLink="/confirm-order" [queryParams]="{ products: product.id }" mat-raised-button color="primary">
Купить сейчас
</a>
<button mat-button color="primary" (click)="addToCart(product)">
<mat-icon>add_shopping_cart</mat-icon>
</button>
</mat-card-footer>
</mat-card>
</ng-template>
</div>
</mat-card>

change component to:
themeProperties$: Observable<number>;
...
ngOnInit() {
this.themeProperties$ = this._config.marketplaceConfig.pipe(map((config) => config.structure?.theme))
}
change template to:
<div [ngSwitch]="themeProperties$ | async">
<ng-container *ngSwitchCase="2">
....
</ng-container>
issues:
casing wrong on ngSwitchCase directive
OnPush change detection not running correctly, async pipe resolves
ng-template doesn't render to DOM. it's a template for use elsewhere. use ng-container instead.

The spelling of the template switch statement is case sensitive, should be *ngSwitchCase.
Also the ng-template does not work in this case, you need to use ng-container
So please change your statements to this layout, and all should work:
<ng-container *ngSwitchCase="2">
also because you are using ChangeDetectionStrategy.OnPush you need to trigger the change detection manually for the ngSwitch.
Here is a working example.
constructor(private _router: Router, private _config: ConfigService, #Self() private onDestroy$: NgOnDestroy, private cdr: ChangeDetectorRef) {}
ngOnInit() {
this._config.marketplaceConfig.pipe(takeUntil(this.onDestroy$)).subscribe((config) => {
this.themeProperties = config.structure?.theme;
this.cdr.detectChanges(); // <=== here, after setting the value
});
}

Bootstrap accordion not working with angular 7

I am building an accordion based on array of data fetched from the server but the clicks are not working.
The accordion is working fine on hard-coded data but not on the data fetched using HttpClient. I even tried using button instead of anchor tags but to no avail.
<div class="accordion" id="chalsAccordion">
<div class="card rounded-0" *ngFor="let chal of chals">
<a data-toggle="collapse" href="#{{ chal._id }}"
><div class="card-header text-dark">
<p class="mb-0">
{{ chal.title }}<small> - {{ chal.author }}</small>
</p>
<p class="mb-0 ml-auto">{{ chal.points }}</p>
</div></a
>
<div id="{{ chal._id }}" class="collapse">
<div class="card-body" [innerHTML]="chal.desc"></div>
<div class="card-footer" *ngIf="!userService.admin">
<form [formGroup]="flagForm" style="width: 100%">
<div class="input-group">
<input type="text" class="form-control rounded-0" placeholder="Flag" formControlName="flag" />
<div class="input-group-append">
<button class="btn btn-primary rounded-0" [disabled]="!flagForm.valid" (click)="submitFlag(chal._id)">Submit</button>
</div>
</div>
</form>
</div>
<div class="card-footer" *ngIf="userService.admin">
<div class="ml-auto">
<button class="btn btn-danger rounded-0"><fa-icon [icon]="['fas', 'trash']"></fa-icon></button>
</div>
</div>
</div>
</div>
</div>
<button class="btn btn-primary add-chal-btn" routerLink="/chals/add" *ngIf="userService.admin"><fa-icon [icon]="['fas', 'plus']"></fa-icon></button>
import { Component, OnInit } from "#angular/core";
import { FormGroup, FormControl, Validators } from "#angular/forms";
import { ToastrService } from "ngx-toastr";
import { UserService } from "../services/user.service";
import { ChalService } from "../services/chal.service";
import { Response } from "../interfaces/response";
import { $ } from "protractor";
#Component({
selector: "app-chals",
templateUrl: "./chals.component.html",
styleUrls: ["./chals.component.scss"]
})
export class ChalsComponent implements OnInit {
chals = [];
flagForm = new FormGroup({
flag: new FormControl("", [Validators.required])
});
constructor(private toast: ToastrService, public userService: UserService, private chalService: ChalService) {}
ngOnInit() {
this.chalService.getAll().subscribe(
(data: Response) => {
this.chals = data.data["chals"];
},
err => {
this.toast.error(err.error.msg, "Oops!!!");
}
);
}
submitFlag(id: string) {}
}
Edit - The response is coming fine and the UI is also rendered correctly, just the problem is that the click does not expand the accordion.

Arrays are Index based so to access an element in an Array you have to provide an Index. To get the results from the response simply try to set the response to your array.
`ngOnInit() {
this.chalService.getAll().subscribe(
(data: Response) => {
this.chals = data.data; // -- updated the code here
},
err => {
this.toast.error(err.error.msg, "Oops!!!");
});
}`
Also please debug chalService to see if you are getting the response of your http call to the api.

I found the problem, it was that the _id field was starting with an int which was the root of the problem.
I solved it by adding an _ to every _id field.

Angular: #Input value available in template, but not in component

So I'm sending a movie object from a parent to a child component. I use #Input from the core module to do this.
Now, I am able to use this data inside the template to display my view, but when I try to access it in for example editReview() then this.movie returns undefined.
Does anyone know how to fix this?
Child Component: the console.log returns undefined
export class ReviewListComponent implements OnInit {
#Input('movie') movie;
constructor(private reviewService: ReviewService){}
editReview() {
console.log(this.movie);
}
}
Child Component Template: I am able to display my name and the content of the review. What's not working unfortunately is when I click the button it says that this.movie is undefined
<ul class="list-group">
<li *ngFor="let review of movie?.reviews" class="list-group-item">
<p>{{review.user.firstName}} {{ review.user.lastName}}</p>
<hr>
<p>{{review.content}}</p>
</li>
</ul>
<button (click)="editReview()">Button</button>
Edit: I added the components and templates of the two parent components: The first one is the movie component where I retrieve the movie object asynchronously, the second is the review component which contains the review-list component that I had already posted above
movie.component.ts
import {Component, OnInit} from "#angular/core";
import { MovieService} from "./movie.service";
import {ActivatedRoute} from "#angular/router";
#Component({
selector: 'app-movie',
templateUrl: './movie.component.html',
styleUrls: ['./movie.component.css']
})
export class MovieComponent implements OnInit{
rating;
movie;
movieId;
constructor(private movieService: MovieService, private route: ActivatedRoute){
}
checkRating(){
return typeof this.rating === 'number';
}
ngOnInit(){
this.route.params.subscribe(params => {
this.movieId = params.id;
var userId = localStorage.getItem('userId');
this.movieService.getMovie(this.movieId)
.subscribe(movie => {
this.movie = movie.obj;
this.movie.averageRating = Number(this.movie.averageRating);
console.log(this.movie);
});
if (userId){
this.movieService.getRating(userId, this.movieId)
.subscribe( result => {
this.rating = result.rating;
})
}
});
}
addRating(score) {
var userId = localStorage.getItem('userId');
this.movieService.addRating(score, userId, this.movie._id)
.subscribe(data => {
this.rating = data.obj.rating;
});
}
}
movie.component.html: this gives movie object to review.component through element app-review
<div class="container">
<div class="col col-md-4 col-md-offset-2">
<img [src]="movie?.pictureUrl" class="img-responsive" alt="hello">
</div>
<div class=" col col-md-6">
<h2>{{movie?.title}} ({{movie?.year}})</h2>
<h3>Average Score:</h3>
<span class="glyphicon glyphicon-star"></span><span><h1>{{movie?.averageRating}}</h1></span><br>
<h3>My Score:</h3>
<div class="row">
<div class="col">
<div *ngIf="!checkRating()" ngbDropdown class="d-inline-block">
<button class="btn btn-outline-primary" ngbDropdownToggle>Rate The Movie!</button>
<div ngbDropdownMenu aria-labelledby="dropdownBasic1">
<button value="1" (click)="addRating(1)" class="dropdown-item">1</button>
<button value="2" (click)="addRating(2)" class="dropdown-item">2</button>
<button value="3" (click)="addRating(3)" class="dropdown-item">3</button>
<button value="4" (click)="addRating(4)" class="dropdown-item">4</button>
<button value="5" (click)="addRating(5)" class="dropdown-item">5</button>
</div>
</div>
<div *ngIf="checkRating()">
<h1>{{rating}}</h1>
</div>
</div>
</div>
<h4>{{movie?.director}}</h4>
<h4>{{movie?.actors}}</h4>
<h4>{{movie?.country}}</h4>
<p> {{movie?.description}}</p>
</div>
</div>
<hr class="col-md-8 col-md-offset-2">
<div class="col-md-8 col-md-offset-2">
<ng-container *ngIf="!!movie">
<app-review [movie]="movie"></app-review>
</ng-container>
</div>
review.component.ts
import {Component, ElementRef, Input, OnInit, ViewChild} from "#angular/core";
import {NgForm} from "#angular/forms";
import {ReviewService} from "./review.service";
import {ActivatedRoute} from "#angular/router";
#Component({
selector: 'app-review',
templateUrl: './review.component.html',
styleUrls: ['./review.component.css']
})
export class ReviewComponent implements OnInit{
movieId;
#Input('movie') movie;
#ViewChild('textArea') textArea;
constructor(private reviewService: ReviewService, private route: ActivatedRoute){}
ngOnInit(){
this.route.params.subscribe( params => {
this.movieId = params.id
});
};
onClear(form: NgForm) {
form.resetForm()
}
onSubmit(form: NgForm) {
let content = form.value.review;
let userId = localStorage.getItem('userId');
let movieId = this.movieId;
this.reviewService.addReview(content, userId, movieId)
.subscribe( result => {
console.log(result.obj);
this.movie.reviews.unshift(result.obj);
form.resetForm()
})
}
}
review.component.html: this gives movie object to the review-list component through app-review-list
<ng-container *ngIf="!!movie">
<app-review-list [movie]="movie"></app-review-list>
</ng-container>
<hr>
<form ngNativeValidate (ngSubmit)="onSubmit(f)" #f="ngForm">
<div class="form-group">
<label for="review">Write A Review:</label>
<textarea
#textArea
(keyup.enter)="onSubmit(f)"
rows="4"
cols="50"
type="text"
id="review"
ngModel
class="form-control"
name="review"
required
></textarea>
</div>
<button type="button" class="btn btn-danger" (click)="onClear(f)">Clear</button>
<button class="btn btn-primary" type="submit">Save</button>
</form>

you can access it in ngOnInit() just implement OnInit interface

How to display simple modal with ng-bootstrap (Angular 2)

I'm trying to show a simple Modal with Ng2-bootstrap as per the following page: https://ng-bootstrap.github.io/#/components/modal
However I am getting errors such as:
Error in ./AppComponent class AppComponent - inline template:7:0 caused by: Missing modal container, add <template ngbModalContainer></template> to one of your application templates.
ORIGINAL EXCEPTION: Missing modal container, add <template ngbModalContainer></template> to one of your application templates.
What am I doing wrong? I've got the following code to try and make this work:
Index.html:
<body>
<app-root>Loading...</app-root>
<template ngbModalContainer></template>
</body>
app.module.ts:
import { NgbModule } from '#ng-bootstrap/ng-bootstrap';
...
#NgModule({...
imports: [
BrowserModule,
FormsModule,
HttpModule,
NgbModule.forRoot() ...
app.component.ts:
import { NgbModal, NgbActiveModal, ModalDismissReasons } from '#ng-bootstrap/ng-bootstrap';
import { SasModalComponent } from './sas-modal/sas-modal.component';
...
constructor(..., private modalService: NgbModal){
}
...
open() {
console.log("trying to open");
const modalRef = this.modalService.open(SasModalComponent);
}
app.component.html
<button class="btn btn-lg btn-outline-primary" (click)="open(content)">Launch demo modal</button>
sas-modal.component.ts
import { NgbModal, NgbActiveModal, ModalDismissReasons } from '#ng-bootstrap/ng-bootstrap';
...
#Component({
selector: 'sas-modal',
templateUrl: './sas-modal.component.html',
styleUrls: ['./sas-modal.component.css']
})
export class SasModalComponent {
closeResult: string;
constructor(private modalService: NgbModal) {}
open(content) {
this.modalService.open(content);
}
}
sas-modal.component.html:
<template #content let-c="close" let-d="dismiss">
<div class="modal-header">
<button type="button" class="close" aria-label="Close" (click)="d('Cross click')">
<span aria-hidden="true">×</span>
</button>
<h4 class="modal-title">Modal title</h4>
</div>
<div class="modal-body">
<p>One fine body…</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" (click)="c('Close click')">Close</button>
</div>
</template>

sas-component.ts should be : -
import { NgbModal, NgbActiveModal, ModalDismissReasons } from '#ng-bootstrap/ng-bootstrap';
...
#Component({
selector: 'sas-modal',
templateUrl: './sas-modal.component.html',
styleUrls: ['./sas-modal.component.css']
})
export class SasModalComponent {
closeResult: string;
constructor(private activeModal: NgbActiveModal) {}
}
app.module.ts Should contain SasModuleComponent in the declaration array and a
entryComponent field that contains SasModuleComponent : -
#NgModule({
imports: [ BrowserModule,
FormsModule , HttpModule, NgbModule.forRoot()],
declarations: [ AppComponent, SasModalComponent],
bootstrap: [ AppComponent ],
entryComponents: [SasModalComponent]
})
You need a entryComponent field in #NgModule()in your module file because you are loading the SasModuleComponent dynamically here this.modalService.open(SasModalComponent).

Try adding <template ngbModalContainer></template> in app-root template
Example:
#Component({
selector: 'app-root',
template: '<template ngbModalContainer></template>'
})

saurav1405's answer provided me with enough useful information to figure this out, however his solution didn't 100% work for me.
For this reason I've upvoted saurav1405's response, but couldn't claim is as the answer as I've had to do a bit more to get it to work for me.
The main difference was having a seperate control component and content component.
This is how I got it working:
>> app.module.ts
Note: saurav1405 suggested putting ModalContentComponent into declarations, (possibly a typo after reviewing his comments again).
but you need to put the actual modal custom modal components in here (in this case SasModalComponent & SasModalContent).
And the content component (SasModalContent) needs to be the entry component.
import { SasModalComponent, SasModalContent } from './sas-modal/sas-modal.component';
...
#NgModule({
declarations: [
AppComponent,
SasModalComponent,
SasModalContent
],
entryComponents: [SasModalContent],
...
>> app.component.html:
The ngbModalContainer declaration should be along side the component declaration in the parent component html template, not in the index.html, which I think was the main reason I was getting the errors posted in the question.
<template ngbModalContainer></template>
<sas-modal-component></sas-modal-component>
>> sas-modal.component.ts:
This file combines both the control component [sas-modal-component] (that opens the content / template) and the content component [sas-modal-content] (that has the reference to the active modal and modal template).
import {Component, Input, Compiler } from '#angular/core';
import {NgbModal, NgbActiveModal} from '#ng-bootstrap/ng-bootstrap';
#Component({
selector: 'sas-modal-content',
templateUrl: 'sas-modal-content.html'
})
export class SasModalContent {
#Input() name;
constructor(public activeModal: NgbActiveModal) { }
}
#Component({
selector: 'sas-modal-component',
templateUrl: 'sas-modal.component.html'
})
export class SasModalComponent {
constructor(private modalService: NgbModal, private compiler: Compiler) { }
open() {
//this.compiler.clearCacheFor(SasModalContent); //Only use when the template is caching when you don't want it to.
const modalRef = this.modalService.open(SasModalContent);
modalRef.componentInstance.name = 'World';
}
}
>> sas-modal.component.html: Contains the button / control to open the modal
<h2> Click the button to open the modal</h2>
<button class="btn btn-lg btn-outline-primary" (click)="open()">Launch demo modal</button>
>> sas-modal-content.html: Holds the modal template - can be whatever you want
<div class="modal-header">
<button type="button" class="close" aria-label="Close" (click)="activeModal.dismiss('Cross click')">
<span aria-hidden="true">×</span>
</button>
<h4 class="modal-title">Hi there!</h4>
</div>
<div class="modal-body card-info">
<h3 style="color: white;">So nice to meet you</h3>
<h4 style="color: white;">This modal is great!</h4>
</div>
<div class="modal-footer ">
<button type="button" class="btn btn-secondary" (click)="activeModal.close('Close click')">Close</button>
</div>