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What could be the best approach to pass data in nested child components, in Angular?


What could be the best approach to pass data in nested child components, in Angular?

By : Mohamed Elhariry
Date : September 17 2020, 05:00 PM
Hope this helps Check here: https://angular.io/guide/component-interaction the ways proposed by the angular team.
I'd say input binding is the way to go in most cases.
code :


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ReactJS - how to pass "global" data to deeply nested child components?

ReactJS - how to pass "global" data to deeply nested child components?


By : user2501011
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Since I originally answered this question, it's become apparent to me that React itself doesn't support "global" data in any sense - it is truly meant to manage the UI and that's it. The data of your app needs to live somewhere else. Having said that, it does now support accessing global context data as detailed in this other answer on this page. This repo (Unstated) supposedly wraps up context in a nicer way, for those that are interested, and here's a good article by Kent Dodds on how the context api has evolved, and is now officially supported in React.
The context approach should only be used for truly global data. If your data falls into any other category, then you should do as follows:
How to pass navigator reference to nested child components?

How to pass navigator reference to nested child components?


By : joan
Date : March 29 2020, 07:55 AM
hop of those help? You are able to pass it down just like any other prop. I'm assuming you're passing navigator down to the routed component...
code :
<Navigator
  ref='Navigator'
  renderScene={(route, navigator) => {
             let RoutedComponent = route.component
             return (
               <RoutedComponent navigator={navigator} {...route.props}/>
             )
  }}
/>
<MyChildComponent navigator={this.props.navigator}/>
How to pass data to nested (child) Angular 2 attribute component

How to pass data to nested (child) Angular 2 attribute component


By : Rahul
Date : March 29 2020, 07:55 AM
wish help you to fix your issue You would do it the same way as with a directive: use an @Input() with the same name as the selector
code :
@Component({
  selector: '[svgmap]',
  templateUrl: 'app/svg/map/svgmap.template.html'
})

export class SvgMapComponent {
   @Input('svgmap') value:number;
}
ngAfterContentInit() {
   // this.value is now with value set
   console.log(`SVGMapComponent ngAfterContentInit: level=${this.value}`);
   this.svgClass= `map map--${this.value}`; // example usage of the value
}
// arbitrary code here 
} // end of class 
Angular 2 sub apps, parent/child, nested components, nested router-outlet, design/coding

Angular 2 sub apps, parent/child, nested components, nested router-outlet, design/coding


By : Marcel Pahnke
Date : March 29 2020, 07:55 AM
hop of those help? Not sure where you heard that Angular2 does not allow more than 1 router-outlet. I am using several in a large application.
Your main app.component will have a router-outlet to handle the root routes. If one of your routes lazy-loads the Admin Module, that admin module will have it's root component that contains the side menu bar and a router-outlet for all the children routes.
code :
export const ROUTES: Routes = [
    // Main redirect
    { path: '', component: MainViewComponent },

    {
        path: 'admin',
        loadChildren: './admin/admin.module#AdminModule'
    }
]
export const routes: Routes = [
    {
        path: '',
        component: AdminComponent,
        children: [
            { path: '', component: Component1},
            { path: 'component2', component: Component2}

        ]
    }
];
<router-outlet></router-outlet>
<router-outlet name="popup"></router-outlet>
{
  path: 'compose',
  component: ComposeMessageComponent,
  outlet: 'popup'
},
<a [routerLink]="[{ outlets: { popup: ['compose'] } }]">Contact</a>
this.router.navigate([{ outlets: { popup: null }}]);
export const adminRoutes: Routes = [
    {
        path: 'admin', component: AdminComponent,
        children: [
            { path: 'world', component: AdminWorldComponent, outlet: 'admin-app' }
            , { path: 'module', component: AdminModuleComponent, outlet: 'admin-app' }
            , { path: 'region', component: AdminRegionComponent, outlet: 'admin-app' }
        ]
    }
];
import { adminRoutes } from './admin.routes';

@NgModule({
  imports: [
    ...
    RouterModule.forChild(adminRoutes),
  ]
   ...
export const appRoutes: Routes = [
   { path: 'admin', loadChildren: './admin/admin.module#AdminModule' },
   ....
import { appRoutes } from './app.routes';

@NgModule({
  imports: [
    ...
    RouterModule.forRoot(appRoutes),
  ]
   ...
Pass data from parent to child angular.js components

Pass data from parent to child angular.js components


By : Mathieu Skimani
Date : March 29 2020, 07:55 AM
like below fixes the issue I have parent component: , Use one-way < binding:
code :
<child-component in-data="$ctrl.parentData"></child-component>
app.component("childComponent", {
    bindings: {
        inData: '<',
    },
    template: `
        <div>{{$ctrl.inData}}</div>
    `,
})
angular.module("app",[])
.component("parentComponent", {
    template: `
        <fieldset>
            Inside parent component<br>
            parentData={{$ctrl.parentData}}
            <child-component in-data="$ctrl.parentData"></child-component>
        </fieldset>
    `,
    controller: function () {
        this.$onInit = () => {
            this.parentData = 'test'
        };
    },
})
.component("childComponent",{
    bindings: {
        inData: '<',
    },
    template: `
        <fieldset>Inside child component<br>
            inData={{$ctrl.inData}}
        </fieldset>
    `,
})
<script src="//unpkg.com/angular/angular.js"></script>
<body ng-app="app">
    <parent-component>
    </parent-component>
<body>
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