import {
Component, Input, ReflectiveInjector, ViewContainerRef, Compiler, NgModule, ModuleWithComponentFactories,
OnInit, ViewChild
} from '@angular/core';
import {BrowserModule} from '@angular/platform-browser';
@Component({
selector: 'app-dynamic',
template: '<h4>Dynamic Components</h4><br>'
})
export class DynamicComponentRenderer implements OnInit {
factory: ModuleWithComponentFactories<DynamicModule>;
constructor(private vcRef: ViewContainerRef, private compiler: Compiler) { }
ngOnInit() {
if (!this.factory) {
const dynamicComponents = {
sayName1: {comp: SayNameComponent, inputs: {name: 'Andrew Wiles'}},
sayAge1: {comp: SayAgeComponent, inputs: {age: 30}},
sayName2: {comp: SayNameComponent, inputs: {name: 'Richard Taylor'}},
sayAge2: {comp: SayAgeComponent, inputs: {age: 25}}};
this.compiler.compileModuleAndAllComponentsAsync(DynamicModule)
.then((moduleWithComponentFactories: ModuleWithComponentFactories<DynamicModule>) => {
this.factory = moduleWithComponentFactories;
Object.keys(dynamicComponents).forEach(k => {
this.add(dynamicComponents[k]);
})
});
}
}
addNewName(value: string) {
this.add({comp: SayNameComponent, inputs: {name: value}})
}
addNewAge(value: number) {
this.add({comp: SayAgeComponent, inputs: {age: value}})
}
add(comp: any) {
const compFactory = this.factory.componentFactories.find(x => x.componentType === comp.comp);
// If we don't want to hold a reference to the component type, we can also say: const compFactory = this.factory.componentFactories.find(x => x.selector === 'my-component-selector');
const injector = ReflectiveInjector.fromResolvedProviders([], this.vcRef.parentInjector);
const cmpRef = this.vcRef.createComponent(compFactory, this.vcRef.length, injector, []);
Object.keys(comp.inputs).forEach(i => cmpRef.instance[i] = comp.inputs[i]);
}
}
@Component({
selector: 'app-age',
template: '<div>My age is {{age}}!</div>'
})
class SayAgeComponent {
@Input() public age: number;
};
@Component({
selector: 'app-name',
template: '<div>My name is {{name}}!</div>'
})
class SayNameComponent {
@Input() public name: string;
};
@NgModule({
imports: [BrowserModule],
declarations: [SayAgeComponent, SayNameComponent]
})
class DynamicModule {}
@Component({
selector: 'app-root',
template: `
<h3>{{message}}</h3>
<app-dynamic #ad></app-dynamic>
<br>
<input #name type="text" placeholder="name">
<button (click)="ad.addNewName(name.value)">Add Name</button>
<br>
<input #age type="number" placeholder="age">
<button (click)="ad.addNewAge(age.value)">Add Age</button>
`,
})
export class AppComponent {
message = 'this is app component';
@ViewChild(DynamicComponentRenderer) dcr;
}
@NgModule({
imports: [BrowserModule],
declarations: [AppComponent, DynamicComponentRenderer],
bootstrap: [AppComponent]
})
export class AppModule {}`
