Overview - The Template for Success in Template Management
Compatibility with Angular Versions
| @ngneat/overview | Angular |
|---|---|
| 6.x | >= 17 |
| 5.x | >= 16 |
| 4.x | >= 14 < 16 |
| 3.x | >= 13 < 14 |
| 2.x | >= 11 < 13 |
Installation
npm i @ngneat/overview
yarn add @ngneat/overviewTable of Contents
DynamicView
Use the dynamicView structural directive to render a component, a template, HTML, or default template dynamically.
Letโs say we build a generic error component. What we want is to give our consumers the flexibly to create it by using one of three options:
- They can choose to use the default template
- They can choose to use their own text which can be static or dynamic
- They can choose to pass their own template or component
import { DynamicViewDirective, Content } from '@ngneat/overview';
@Component({
template: ` <div *dynamicView="view">Default view</div> `,
standalone: true,
imports: [DynamicViewDirective],
})
export class ErrorComponent {
@Input() view: Content | undefined;
}You can also pass a context or an injector as inputs to the directive:
<h5>Component</h5>
<ng-container
*dynamicView="component;
injector: myInjector;
context: { $implicit: 'my title' }"
/>
<h5>Template</h5>
<ng-template #tpl let-title>
<b>{{ title }}</b>
</ng-template>
<ng-container *dynamicView="tpl; context: { $implicit: 'my title' }" />If you pass context to a component and the value can be accessed via the injectViewContext function:
import { injectViewContext } from '@ngneat/overview';
interface Context {
title: string;
}
@Component({
template: `<div>{{ context().title }}</div>`,
standalone: true,
})
export class MyDynamicComponent {
context: Signal<Context> = injectViewContext<Context>();
}injectViewContext returns a readonly signal with the view's context object.
Teleporting
Teleporting means rendering a view at a different location from its declaration. There are two cases it might be helpful:
- Avoid prop drilling to a nested component.
- Rendering a view at another place in the DOM while keeping its context where itโs defined.
You can read more about this approach in this article.
Use the teleportOutlet directive to define a new outlet. An outlet is an anchor where the view will be projected as a sibling.
import { TeleportOutletDirective } from '@ngneat/overview';
@Component({
template: `
<div class="flex">
<ng-container teleportOutlet="someId"/>
</div>
`,
standalone: true,
imports: [TeleportOutletDirective],
})
export class FooComponent {}Use the teleportTo directive to teleport the view to a specific outlet:
import { TeleportDirective } from '@ngneat/overview';
@Component({
template: `
<section *teleportTo="someId">
{{ value }}
</section>
`,
standalone: true,
imports: [TeleportDirective],
})
export class BarComponent {
value = '...';
}ViewService
The ViewService provides facade methods to create modular views in Angular. It's been used in various projects like hot-toast, and helipopper.
createComponent
The createComponent method takes a Component, and returns an instance of CompRef:
import { ViewService, CompRef } from '@ngneat/overview';
@Injectable()
class ToastService {
private viewService = inject(ViewService);
componentRef: CompRef;
init() {
this.componentRef = this.viewService
.createComponent(HotToastContainerComponent)
.setInput('defaultConfig', defaultConfig)
.appendTo(document.body);
}
}There are cases where we want to use an Angular component template in a third-party library that takes a native DOM element or a string. In this case, we can use the getRawContent or the getElement method, respectively.
import { ViewService } from '@ngneat/overview';
@Directive()
class ChartDirective {
private viewService = inject(ViewService);
createChart(color: string) {
const ref = this.viewService.createComponent(FooTooltip).setInput('color', color).detectChanges(document.body);
const content = ref.getRawContent();
ref.destroy();
Highcharts.chart('container', {
tooltip: {
formatter: function () {
return content;
},
useHTML: true,
},
});
}
}createComponent Options
createComponent<Comp, Context>(component: Type<Comp>, {
injector?: Injector,
environmentInjector?: EnvironmentInjector,
context?: Context,
vcr?: ViewContainerRef,
})createTemplate
The createTemplate method takes a TemplateRef, and returns an instance of ViewRef.
createTemplate<Context>(tpl: TemplateRef<Context>, {
context?: Context,
vcr?: ViewContainerRef,
injector?: Injector,
})createView
The createView method takes a Component, a TemplateRef or a string, and creates a View:
import { ViewService, Content } from '@ngneat/overview';
@Injectable()
class ToastService {
private viewService = inject(ViewService);
createToast(content: Content) {
const ref = this.viewService.createView(content);
document.body.appendChild(ref.getElement());
}
}Contributors โจ
Thanks goes to these wonderful people (emoji key):
 Netanel Basal ๐ป ๐ค |
 Dharmen Shah ๐ ๐ |
This project follows the all-contributors specification. Contributions of any kind welcome!