Having trouble getting the Angular2 [innerHtml] directive to render properly?

Question

Having trouble getting the Angular2 [innerHtml] directive to render properly?

Is there a way to inject HTML code from one Angular component into another using Angular 2 tags?

@Component({
  selector: 'app-root',
  template: '<app-a [my-html]="my-html"> </app-a>',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  my-html= '<span> {{variableFromAComponent}}</span>';
}



@Component({
      selector: 'app-a',
      template: '<div [innerHtml]="my-html"> </div>',
    })
    export class AComponent {
      @Input('my-html') my-html:any;
      public variableFromAComponent='its work!'; 
    }

Despite setting up the components in this way, the expected result of "its work!" is not displayed due to the angular2 tags preventing the variable from rendering properly.

angular typescript innerhtml

Answer 1

Answer №1

I discovered a resolution by utilizing the angular2-dynamic-component library

<template dynamic-component
           [componentContext]="self"
           [componentModules]="dynamicExtraModules"
           [componentTemplate]='"here html tags with angular2 tags"'>
</template>

Answer 2

I discovered a resolution by utilizing the angular2-dynamic-component library

<template dynamic-component
           [componentContext]="self"
           [componentModules]="dynamicExtraModules"
           [componentTemplate]='"here html tags with angular2 tags"'>
</template>

Answer 3

Answer №2

When using [innerHTML]="..." in Angular, the HTML added is not processed by Angular at all. It is simply added as-is. In some cases, you may need to use a Sanitizer to ensure that nothing is stripped for security reasons, as discussed in this post on Stack Overflow: In RC.1 some styles can't be added using binding syntax.

To dynamically add components in Angular, you can utilize

ViewContainerRef.createComponent()

. This allows you to create components based on user input or interactions, as demonstrated in this post on Stack Overflow: Angular 2 dynamic tabs with user-click chosen components

Answer 4

When using [innerHTML]="..." in Angular, the HTML added is not processed by Angular at all. It is simply added as-is. In some cases, you may need to use a Sanitizer to ensure that nothing is stripped for security reasons, as discussed in this post on Stack Overflow: In RC.1 some styles can't be added using binding syntax.

To dynamically add components in Angular, you can utilize

ViewContainerRef.createComponent()

. This allows you to create components based on user input or interactions, as demonstrated in this post on Stack Overflow: Angular 2 dynamic tabs with user-click chosen components

Answer 5

Answer №3

If you're looking to establish communication between components, there are a few approaches you can take.

COMPONENT INTERACTION

For components with a parent/child relationship, utilizing Input() and Output() decorators can facilitate the exchange of data.

The child component accesses the value via the Input(),

child.component.ts

import { Component, Input } from '@angular/core';
@Component({
  selector: 'child',
  template: '<div>{{myInfo}}</div>',
  providers: [ DataService]
})
export class ChildComponent implements OnInit {
   @Input() myInfo: string;
}

which is passed down from the parent component in the template:

parent.component.html

<child [myInfo]="'Your Text Here (or a variable containing "its work")'"></child>

To enable communication from child to parent, you can utilize Output().

SERVICES

Another method involves creating a shared service that is injected into both components. One component can transmit a value to the service, while the other can access that value. In Angular2, this can be achieved by employing observables for data propagation.

Answer 6

If you're looking to establish communication between components, there are a few approaches you can take.

COMPONENT INTERACTION

For components with a parent/child relationship, utilizing Input() and Output() decorators can facilitate the exchange of data.

The child component accesses the value via the Input(),

child.component.ts

import { Component, Input } from '@angular/core';
@Component({
  selector: 'child',
  template: '<div>{{myInfo}}</div>',
  providers: [ DataService]
})
export class ChildComponent implements OnInit {
   @Input() myInfo: string;
}

which is passed down from the parent component in the template:

parent.component.html

<child [myInfo]="'Your Text Here (or a variable containing "its work")'"></child>

To enable communication from child to parent, you can utilize Output().

SERVICES

Another method involves creating a shared service that is injected into both components. One component can transmit a value to the service, while the other can access that value. In Angular2, this can be achieved by employing observables for data propagation.

Answer 7

Answer №4

If you want to manipulate DOM elements in Angular, the Renderer2 Class is a useful tool.

import { ElementRef, Renderer2 } from '@angular/core';

constructor (
  private elementRef: ElementRef,
  private renderer: Renderer
) {}

public ngAfterViewInit(): void {
  this.renderer
     .setElementProperty(
        this.elementRef.nativeElement, 
        'innerHTML',
        '<h1> Custom Title </h1>'
     );
}

Answer 8

If you want to manipulate DOM elements in Angular, the Renderer2 Class is a useful tool.

import { ElementRef, Renderer2 } from '@angular/core';

constructor (
  private elementRef: ElementRef,
  private renderer: Renderer
) {}

public ngAfterViewInit(): void {
  this.renderer
     .setElementProperty(
        this.elementRef.nativeElement, 
        'innerHTML',
        '<h1> Custom Title </h1>'
     );
}

Having trouble getting the Angular2 [innerHtml] directive to render properly?

Answer №1

Answer №2

Answer №3

Answer №4

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