I am not able to render component header in my application. I don't get any error also. In browser, It shows the header tag also but text present in header.component.html is not shown.
app.modules.ts
import { NgModule } from '#angular/core';
import { BrowserModule } from '#angular/platform-browser';
import { FormsModule } from '#angular/forms';
import { AppComponent } from './app.component';
import { HeaderComponent } from './header/header.component';
#NgModule({
imports: [ BrowserModule, FormsModule ],
bootstrap: [ AppComponent ],
declarations: [HeaderComponent]
})
export class AppModule { }
app.component.ts
import { Component } from '#angular/core';
#Component({
selector: 'project',
templateUrl: './app.component.html',
styleUrls: [ './app.component.css' ]
})
export class AppComponent {
name = 'Project';
}
app.component.html
<header></header>
<p>
Hello World
</p>
header.component.ts
import { Component, OnInit } from '#angular/core';
#Component({
selector: 'header',
templateUrl: './header.component.html',
styleUrls: ['./header.component.css']
})
export class HeaderComponent{
}
Please help me. :'(
Related
I'm trying to fetch data From an API using Angular. I can see in the console log that the data is fetched, however the data doesn't render on the page. Help appreciated.
Here is my code:
app.component.html
<p>{{data.Name}}</p>
<p>{{data.Habitat}}</p>
<p>{{data.Status}}</p>
app.component.ts
import { ApiserviceService } from './Service';
#Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
title = 'apidata';
data:any;
constructor(private _apiservie:ApiserviceService){}
ngOnInit(){
this._apiservie.getdata().subscribe(res=>{
this.data=res;
console.log(res)
})
app.module.ts
import { BrowserModule } from '#angular/platform-browser';
import { HttpClientModule } from '#angular/common/http';
import { AppComponent } from './app.component';
#NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
HttpClientModule,
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
service.ts
import { Injectable } from '#angular/core';
#Injectable({
providedIn: 'root'
})
export class ApiserviceService {
constructor(private _http:HttpClient){}
getdata(){
return this._http.get('https://mocki.io/v1/8f823c35-8ae8-4fb5-a84b-cf7dce59c7a7');
}
}
app.component.ts
import { ApiserviceService } from './Service';
#Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
title = 'apidata';
data:any;
constructor(private _apiservie:ApiserviceService){}
ngOnInit(){
this.getinfo()
}
getinfo(){
this._apiservie.getdata().subscribe(res=>{
this.data=res;
console.log(res)
})
}
}
app.component.html
<div *ngFor="let item of data">
<p>{{item.Name}}</p>
<p>{{item.Habitat}}</p>
<p>{{item.Status}}</p>
</div>
Due to the requirements of project I need to send data value dataOne in app.component.ts to its app.module.ts so that I can store it in variable moduleValue. Please refer code below and suggest how can achieve this transfer of data within files.
app.component.ts
import { Component } from '#angular/core';
#Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
title = 'formcheck';
dataOne: any;
getValues(val: any) {
console.warn(val);
this.dataOne = val;
}
}
app.module.ts
import { NgModule } from '#angular/core';
import { FormsModule } from '#angular/forms';
import { BrowserModule } from '#angular/platform-browser';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
let moduleValue: any;
#NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
AppRoutingModule,
FormsModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule {}
}
I'd suggest that you declare a variable or an observable in a service, however, since you mentioned that you need to do this within the same files you might want to export a variable from your component and import it into your module like so:
app.component.ts
export class AppComponent {
title = 'formcheck';
dataOne: any;
getValues(val: any) {
console.warn(val);
this.dataOne = val;
DATA = this.dataOne;
}
}
export var DATA = '';
app.module.ts
import { NgModule } from '#angular/core';
import { FormsModule } from '#angular/forms';
import { BrowserModule } from '#angular/platform-browser';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { DATA } from './app.component';
let moduleValue: any;
#NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
AppRoutingModule,
FormsModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule {}
}
Here is the solution using service, I used BehaviorSubject for dynamic updation of value.
https://stackblitz.com/edit/angular-9pitmh?file=src%2Fapp%2Fapp.component.ts,src%2Fapp%2Fapp.component.html,src%2Fapp%2Fapp.module.ts,src%2Fapp%2Fdata.service.ts,src%2Fapp%2Fhello.component.ts
First is the path in my app routing module
Then the home component
Next is the app component
Lastly the html for button creation
path in the app.routing.module.ts
{
path: 'about-us',
pathMatch: 'full',
data: { type: '', breadcrumb: '' },
component: AboutUsComponent,
},
default constructor and ngOnInit in home.component.ts only router variable in constructor
import { Component, OnInit } from '#angular/core';
import {Router} from '#angular/router';
#Component({
selector: 'app-home',
templateUrl: './home.component.html',
styleUrls: ['./home.component.scss'],
})
export class HomeComponent implements OnInit {
constructor(private router : Router) {}
ngOnInit(): void {}
}
default imports in app.module.ts only
import { NgModule } from '#angular/core';
import { BrowserModule } from '#angular/platform-browser';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { HomeComponent } from './home/home.component';
import { AboutUsComponent } from './about-us/about-us.component';
import { LoginComponent } from './login/login.component';
import { LogoutComponent } from './logout/logout.component';
import { SocialMediaComponent } from './social-media/social-media.component';
import { LoggedInHomeComponent } from './logged-in-home/logged-in-home.component';
import { PageNotFoundComponent } from './page-not-found/page-not-found.component';
#NgModule({
declarations: [
AppComponent,
HomeComponent,
AboutUsComponent,
LoginComponent,
LogoutComponent,
SocialMediaComponent,
LoggedInHomeComponent,
PageNotFoundComponent
],
imports: [
BrowserModule,
AppRoutingModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
**button creation code home.component.html**
<div class="about-us">
<button class="button-box" type="button">
<a [routerLink]="'about-us'" [routerLinkActive]="['active']">about-us</a>
</button>
</div>
*My objectives are:
i. Redirect to about us component on click
ii. Open about us component when path is mentioned in url
But neither is working!*
You are missing to import RouterModule from import { RouterModule } from '#angular/router';
Hope you have include RoutingModule in AppRoutingModule. If so try the following code
<a [routerLink]="['about-us']" [routerLinkActive]="['active']">about-us</a>
Have you added router-outlet in
app.component.html file.
Add only above tag & remove everything else from app.component.html if added
Try this & let me know
I have created a simple service using angular4
Here's the code:
//app.module.ts
import { BrowserModule } from '#angular/platform-browser';
import { NgModule } from '#angular/core';
import { MyserviceService } from './myservice.service';
import { AppComponent } from './app.component';
#NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule
],
providers: [MyserviceService],
bootstrap: [AppComponent]
})
export class AppModule { }
//the service
import { Injectable } from '#angular/core';
#Injectable()
export class MyserviceService {
constructor() { }
cars = ['fiat', 'form'];
myData() {
return 'Hello from service!';
}
}
//app.component.ts
import { Component, OnInit } from '#angular/core';
import { MyserviceService } from './myservice.service';
#Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {
title = 'app';
constructor(private myservice: MyserviceService) {}
ngOnInit() {
console.log(this.myservice.cars);
this.something = this.myData();
}
}
I am having 2 problems here:
No console message
myData is not recognized 'myData does not exists in app.component'
What I'm I doing wrong here?
You are accessing myData() method on app.component, it is not a member of app component. you have to access myData() with myservice, like this
ngOnInit() {
console.log(this.myservice.cars);
this.something = this.myservice.myData();
}
and Everything else looks fine to me.
I'm trying to follow the angualrJS 2.0 tutorial on calling another component inside another one. However I'm getting an error saying that it is not a known element on the <main-footer></main-footer> selector. What am i doing wrong?
//app.component.ts
import { Component } from '#angular/core';
import { ROUTER_DIRECTIVES } from '#angular/router';
import { FooterComponent } from './footer.component';
#Component({
selector: 'my-app',
// use templateurl for template files
template: `
<h1>My First Angular App 22</h1>
<main-footer></main-footer>
`,
directives: [FooterComponent]
})
export class AppComponent {
}
// footer.component.ts
import { Component } from '#angular/core';
#Component({
selector: 'main-footer',
template: `
<h2>The footer</h2>
`,
})
export class FooterComponent{
}
EDIT
So I got it working, by declaring and importing the file in app.module.ts as well as the app.component.ts file Thanks to the help from #Chang I did not see this in the tutorials on AngualrJS 2.0
// app.module.ts
import { NgModule } from '#angular/core';
import { BrowserModule } from '#angular/platform-browser';
import { AppComponent } from './app.component';
import { FooterComponent } from './footer.component';
#NgModule({
imports: [ BrowserModule ],
declarations: [ AppComponent, FooterComponent],
bootstrap: [ AppComponent ]
})
export class AppModule { }
can try to declare "FooterComponent" in your app.modules ?
#NgModule({
imports: [
BrowserModule,
FormsModule,
HttpModule,
InMemoryWebApiModule.forRoot(InMemoryDataService),
routing
],
declarations: [
AppComponent,
FooterComponent
],
providers: [
],
bootstrap: [ AppComponent ]
})
export class AppModule {
}