Inform the Angular2 Directive about any modifications

Question

Inform the Angular2 Directive about any modifications

I'm facing an issue that needs solving. I have a component containing a template.

ul(slider)
    li(*ngFor="let car of getRecentCars()")
        car-poster(bcg="{{car.recentBackgroundUrl}}",  image="{{car.indexImage}}")

Additionally, there is a slider directive present.

@Directive({
    selector: '[slider]'
})
export class sliderDirective{
    private el: HTMLElement;

    constructor(@Inject(ElementRef) elementRef: ElementRef) {
        this.el = elementRef.nativeElement;
        let _this = this;
        setTimeout(function(){
            $(_this.el).slick({
                infinite: false,
                slidesToShow: 1,
                slidesToScroll: 1
            });
        }, 0);

    }

}

The problem arises when the directive triggers before the component's data is available. Is there a way to delay the execution of the directive until the component finishes rendering?

typescript angular angular2-directives angular2-components

Answer 1

Answer №1

One way to enhance your component or directive is by utilizing lifecycle hooks such as ngAfterViewChecked:

Check out this example:

@Directive({
    selector: '[slider]'
})
export class sliderDirective{
    private el: HTMLElement;

    constructor(@Inject(ElementRef) private elementRef: ElementRef) {
        this.el = elementRef.nativeElement;
    }

    ngAfterViewChecked() {
      $(this.el).slick({
             infinite: false,
             slidesToShow: 1,
             slidesToScroll: 1
      });
    }
}

To explore more about lifecycle hooks, refer to this documentation:

https://angular.io/docs/ts/latest/guide/lifecycle-hooks.html

Answer 2

One way to enhance your component or directive is by utilizing lifecycle hooks such as ngAfterViewChecked:

Check out this example:

@Directive({
    selector: '[slider]'
})
export class sliderDirective{
    private el: HTMLElement;

    constructor(@Inject(ElementRef) private elementRef: ElementRef) {
        this.el = elementRef.nativeElement;
    }

    ngAfterViewChecked() {
      $(this.el).slick({
             infinite: false,
             slidesToShow: 1,
             slidesToScroll: 1
      });
    }
}

To explore more about lifecycle hooks, refer to this documentation:

https://angular.io/docs/ts/latest/guide/lifecycle-hooks.html

Inform the Angular2 Directive about any modifications

Answer №1

Similar questions

The error message "Type 'null' cannot be assigned to type 'Element | DocumentFragment'" occurs when using Nextjs/React createPortal

Leveraging the Cache-Control header in react-query for optimal data caching

What is preventing the route with parameters from functioning properly in Angular2?

Performing a search through a string array and updating a specific portion of each string

TypeScript encounters difficulty in locating the namespace within a Node.js dependency

How to handle type errors when using properties in Vue3 Single File Components with TypeScript

When running either the "ng serve" or "npm start" command, the browser does not open automatically as expected

What is the location for adjusting the angular strictness flags that determine the level of strictness for strictTemplates?

Using Math.min() or Math.max() syntax in Angular templates: A comprehensive guide

What is the best way to resize a div located below a dynamic div in order to occupy the available space?

I'm facing an issue where Typescript isn't recognizing Jest types

Tips for implementing JS function in Angular for a Collapsible Sidebar in your component.ts file

Utilizing Angular to nest a simple component within another component and display it exclusively on a targeted page or parent component

A new interface property type that is customized based on the type property that is passed in

Retrieving child component's data property in Vue 3 using TypeScript and Composition API

Is it possible to use optional destructured arguments in a Typescript function?

Angular integration with Keycloak

After upgrading from angular version 7.0 to 8.0, I realized that the target in the tsconfig.json file remained unchanged

Guide to utilizing selenium for triggering Angular events (ng-click)

Focusing on the active element in Typescript