My solution using "content projection" and data binding through a
BehaviorSubject.
*page-layout.component (the shared HTML)*
<div style="background-color: red;">
<h2>subtitle: {{subtitle}}</h2>
<ng-content></ng-content>
</div>
import { Component, OnInit } from '@angular/core';
import { LayoutService } from '../../services/layout.service';
@Component({
selector: 'page-layout',
templateUrl: './page-layout.component.html',
styleUrls: ['./page-layout.component.css']
})
export class PageLayoutComponent implements OnInit {
subtitle = '';
constructor(private LayoutService: LayoutService) {
}
ngOnInit() {
this.LayoutService.observable.subscribe(x => {
if (console) {
console.log('PageLayoutComponent, subscribe: ' +
JSON.stringify(x));
}
this.subtitle = x.subtitle;
});
}
}
*assembly-list.component (a component using the shared HTML)*
<page-layout>
<p>ToDo</p>
</page-layout>
import { Component, OnInit } from '@angular/core';
import { LayoutService } from '../../services/layout.service';
@Component({
selector: 'assembly-list',
templateUrl: './assembly-list.component.html',
styleUrls: ['./assembly-list.component.css']
})
export class AssemblyListComponent implements OnInit {
constructor(private LayoutService: LayoutService) {
}
ngOnInit() {
this.LayoutService.emitTitle('AssemblyListComponent1',
'AssemblyListComponent2');
}
}
*layout-service (the data binding for the shared HTML)*
import { Component, Injectable } from '@angular/core';
import { BehaviorSubject } from 'rxjs/BehaviorSubject';
export interface ILayoutServiceData {
title: string;
subtitle: string;
}
@Injectable()
export class LayoutService {
private behaviorSubject: BehaviorSubject<ILayoutServiceData> = new
BehaviorSubject({title: null, subtitle: null});
observable = this.behaviorSubject.asObservable();
emitTitle(title: string, subtitle: string) {
if (console) {
console.log(`LayoutService.emitTitle(\'${title}\',
\'${subtitle}\'`);
}
const data: ILayoutServiceData = {
title: title,
subtitle: subtitle
};
this.behaviorSubject.next(data);
}
}
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