innerhtml - Angular 2 equivalent of ng-bind-html, $sce.trustAsHTML(), and $compile?

Question

In Angular 1.x, we could insert HTML in real-time by using the HTML tag ng-bind-html, combined with the JavaScript call $sce.trustAsHTML(). This got us 80% of th way there, but wouldn't work when Angular tags were used, such as if you inserted HTML that used ng-repeat or custom directives.

To get that to work, we could use a custom directive that called $compile.

What is the equivalent for all of this in Angular 2? We can bind using [inner-html] but this only works for very simple HTML tags such as <b>. It doesn't transform custom angular 2 directives into functioning HTML elements. (Much like Angular 1.x without the $compile step.) What is the equivalent of $compile for Angular 2?

Answer 1

In Angular2 you should use DynamicComponentLoader to insert some "compiled content" on the page. So for example if you want to compile next html:

<div>
    <p>Common HTML tag</p>
    <angular2-component>Some angular2 component</angular2-component>
</div>

then you need to create component with this html as a template (let's call it CompiledComponent) and use DynamicComponentLoader to insert this component on the page.

@Component({
  selector: 'compiled-component'
})
@View({
  directives: [Angular2Component],
  template: `
    <div>
      <p>Common HTML tag</p>
      <angular2-component>Angular 2 component</angular2-component>
    </div>
  `
})
class CompiledComponent {
}

@Component({
  selector: 'app'
})
@View({
  template: `
    <h2>Before container</h2>
    <div #container></div>
    <h2>After conainer</h2>
  `
})
class App {
  constructor(loader: DynamicComponentLoader, elementRef: ElementRef) {
    loader.loadIntoLocation(CompiledComponent, elementRef, 'container');
  }
}

Check out this plunker

UPD You can create component dynamically right before the loader.loadIntoLocation() call:

// ... annotations
class App {
  constructor(loader: DynamicComponentLoader, elementRef: ElementRef) {
    // template generation
    const generatedTemplate = `<b>${Math.random()}</b>`;

    @Component({ selector: 'compiled-component' })
    @View({ template: generatedTemplate })
    class CompiledComponent {};

    loader.loadIntoLocation(CompiledComponent, elementRef, 'container');
  }
}

I personally don't like it, it's look like a dirty hack to me. But here is the plunker

PS Beware that at this moment angular2 is under active development. So situation can be changed at any time.