Angular 4 - How to display 3rdpartylicenses in HTML

Question

In my package.json the build process I use for my live website "build-prod": "ng build --prod --extract-licenses", I use --extract-licenses because I wish to have the licenses displayed in HTML on my website.

How would I go about displaying this .txt file in HTML with Angular?

Answer 1

It should be available at the root of the domain.

Here's a screenshot of my dist folder after running ng build --prod (which also extracts the licenses):

You should be able to access it by following this code: (Oops! I forgot that you also have to install @angular/common/http and use the new HttpClient)

With HttpClient introduced recently in Angular 4:

import { HttpClient } from '@angular/common/http';
export class AboutComponent implements OnInit {
    constructor(private http: HttpClient){}
    license: string;
    ngOnInit(){
        this.http.get('/3rdpartylicenses.txt', {responseType: 'text'})
            .subscribe(result => {
                this.license = result;
            })
    }
}

Using the old Http:

import { Http } from '@angular/http';
export class AboutComponent implements OnInit {
    constructor(private http: Http){}
    license: string;
    ngOnInit(){
        this.http.get('/3rdpartylicenses.txt')
            .map(res => res.text())
            .subscribe(result => {
                this.license = result;
            })
    }
}

<pre [innerText]="license"></pre>

---

EDIT:

You can also pipe the license property to an async pipe from a HttpClient request.

See the code below for more info:

Component:

import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';
export class AboutComponent {
  licenses: Observable<string>;
  constructor(private http: HttpClient) {
    this.licenses = http.get('/3rdpartylicenses.txt', { responseType: 'text' });
  }
}

Component template:

<pre>
  <code>
    {{ licenses | async }}
  </code>
</pre>

Here's a StackBlitz demo to play around with!