Angular 2+ one-time binding

Question

In angular 1 we could do one time binding in this way: {{ ::myFunction() }}.

In angular 2 this is throwing:

EXCEPTION: Template parse er         


        

Answer 1

I found solution for one time binding in angular 2 here: https://github.com/angular/angular/issues/14033

I created this directive:

 import { Directive, TemplateRef, ViewContainerRef, NgZone } from "@angular/core";

@Directive({
    selector: '[oneTime]',
})
export class OneTimeDirective {
    constructor(template: TemplateRef, container: ViewContainerRef, zone: NgZone) {
        zone.runOutsideAngular(() => {
            const view = container.createEmbeddedView(template);
            setTimeout(() => view.detach());
        })
    }
}

And used it:

For example: