[angular] How to set <iframe src="..."> without causing `unsafe value` exception?

I am working on a tutorial involving the setting of an iframe src attribute:

<iframe width="100%" height="300" src="{{video.url}}"></iframe>

This throws an exception:

Error: unsafe value used in a resource URL context
at DomSanitizationServiceImpl.sanitize...

I have already tried using bindings with [src] with no success.

This one works for me.

import { Component,Input,OnInit} from '@angular/core';
import {DomSanitizer,SafeResourceUrl,} from '@angular/platform-browser';

@Component({
    moduleId: module.id,
    selector: 'player',
    templateUrl: './player.component.html',
    styleUrls:['./player.component.scss'],
    
})
export class PlayerComponent implements OnInit{
    @Input()
    id:string; 
    url: SafeResourceUrl;
    constructor (public sanitizer:DomSanitizer) {
    }
    ngOnInit() {
        this.url = this.sanitizer.bypassSecurityTrustResourceUrl(this.id);      
    }
}

Congratulation ! ¨^^ I have an easy & efficient solution for you, yes!

<iframe width="100%" height="300" [attr.src]="video.url"></iframe

[attr.src] instead of src "video.url" and not {{video.url}}

Great ;)

constructor(
 public sanitizer: DomSanitizer, ) {

 }

I had been struggling for 4 hours. the problem was in img tag. When you use square bracket to 'src' ex: [src]. you can not use this angular expression {{}}. you just give directly from an object example below. if you give angular expression {{}}. you will get interpolation error.

1. first i used ngFor to iterate the countries

   *ngFor="let country of countries"
   

2. second you put this in the img tag. this is it.

   <img [src]="sanitizer.bypassSecurityTrustResourceUrl(country.flag)"
   height="20" width="20" alt=""/>
   

I ran into this issue as well, but in order to use a safe pipe in my angular module, I installed the safe-pipe npm package, which you can find here. FYI, this worked in Angular 9.1.3, I haven't tried this in any other versions of Angular. Here's how you add it step by step:

1. Install the package via npm install safe-pipe or yarn add safe-pipe. This will store a reference to it in your dependencies in the package.json file, which you should already have from starting a new Angular project.

2. Add SafePipeModule module to NgModule.imports in your Angular module file like so:

   import { SafePipeModule } from 'safe-pipe';
   
   @NgModule({
       imports: [ SafePipeModule ]
   })
   export class AppModule { }
   
   

3. Add the safe pipe to an element in the template for the Angular component you are importing into your NgModule this way:

<element [property]="value | safe: sanitizationType"></element>

4. Here are some specific examples of the safePipe in an html element:

<div [style.background-image]="'url(' + pictureUrl + ')' | safe: 'style'" class="pic bg-pic"></div>
<img [src]="pictureUrl | safe: 'url'" class="pic" alt="Logo">
<iframe [src]="catVideoEmbed | safe: 'resourceUrl'" width="640" height="390"></iframe>
<pre [innerHTML]="htmlContent | safe: 'html'"></pre>

This works me to Angular 5.2.0

sarasa.Component.ts

import { Component, OnInit, Input } from '@angular/core';
import { DomSanitizer, SafeResourceUrl } from '@angular/platform-browser';

@Component({
  selector: 'app-sarasa',
  templateUrl: './sarasa.component.html',
  styleUrls: ['./sarasa.component.scss']
})

export class Sarasa implements OnInit {
  @Input()
  url: string = "https://www.mmlpqtpkasjdashdjahd.com";
  urlSafe: SafeResourceUrl;

  constructor(public sanitizer: DomSanitizer) { }

  ngOnInit() {
    this.urlSafe= this.sanitizer.bypassSecurityTrustResourceUrl(this.url);
  }

}

sarasa.Component.html

<iframe width="100%" height="100%" frameBorder="0" [src]="urlSafe"></iframe>

thats all folks!!!

I usually add separate safe pipe reusable component as following

# Add Safe Pipe

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

@Pipe({name: 'mySafe'})
export class SafePipe implements PipeTransform {
    constructor(private sanitizer: DomSanitizer) {
    }

    public transform(url) {
        return this.sanitizer.bypassSecurityTrustResourceUrl(url);
    }
}

# then create shared pipe module as following 

import { NgModule } from '@angular/core'; 
import { SafePipe } from './safe.pipe';
@NgModule({
    declarations: [
        SafePipe
    ],
    exports: [
        SafePipe
    ]
})
export class SharedPipesModule {
}

# import shared pipe module in your native module

@NgModule({
    declarations: [],
    imports: [
        SharedPipesModule,
    ],
})
export class SupportModule {
}

<!-------------------
call your url (`trustedUrl` for me) and add `mySafe` as defined in Safe Pipe
---------------->
<div class="container-fluid" *ngIf="trustedUrl">
    <iframe [src]="trustedUrl | mySafe" align="middle" width="100%" height="800" frameborder="0"></iframe>
</div>