Is there a way to showcase a TypeScript string variable with HTML content on a template as an element instead of just a string?

Question

Is there a way to showcase a TypeScript string variable with HTML content on a template as an element instead of just a string?

I have a complex string in my angular application component typescript

field: string;
  constructor() { 
    this.field = "Hello, I am <b>happy</b><br><br><input type='text' value='hello' />"
  }

The corresponding html template for the component includes:

<div [innerHTML]="field"></div>

The expected output is:

Hello, I am happy (happy in bold)
[Text input field here]

However, the entire input tag is getting omitted. Any suggestions on how to properly render HTML content like this in an angular template?

angular typescript html-rendering

Answer 1

Answer №1

To ensure the safety of your HTML before injecting it, it is important to trust the source first. Utilizing Angular's DomSanitizer is crucial for this task. Elements like h3, p, or div are considered safe, whereas input elements are not.

If you need to use this functionality repeatedly, creating a custom pipe can be helpful. Here is an example implementation:

import { Pipe, PipeTransform } from '@angular/core';
import { DomSanitizer, SafeHtml } from '@angular/platform-browser';

@Pipe({
    name: 'sanitizeHtml'
})
export class SanitizeHtml implements PipeTransform  {

   constructor(private _sanitizer: DomSanitizer){}  

   transform(v: string) : SafeHtml {
      return this._sanitizer.bypassSecurityTrustHtml(v); 
   } 
}

Once you have created the pipe, you can use it in your HTML like this:

<div [innerHTML]="field | sanitizeHtml"></div>

Answer 2

To ensure the safety of your HTML before injecting it, it is important to trust the source first. Utilizing Angular's DomSanitizer is crucial for this task. Elements like h3, p, or div are considered safe, whereas input elements are not.

If you need to use this functionality repeatedly, creating a custom pipe can be helpful. Here is an example implementation:

import { Pipe, PipeTransform } from '@angular/core';
import { DomSanitizer, SafeHtml } from '@angular/platform-browser';

@Pipe({
    name: 'sanitizeHtml'
})
export class SanitizeHtml implements PipeTransform  {

   constructor(private _sanitizer: DomSanitizer){}  

   transform(v: string) : SafeHtml {
      return this._sanitizer.bypassSecurityTrustHtml(v); 
   } 
}

Once you have created the pipe, you can use it in your HTML like this:

<div [innerHTML]="field | sanitizeHtml"></div>

Is there a way to showcase a TypeScript string variable with HTML content on a template as an element instead of just a string?

Answer №1

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