doc-preview component to sanitize src

doc-preview-component.ts

import {Component, Input} from '@angular/core';
import { DomSanitizer, SafeHtml } from '@angular/platform-browser';
import {DOMPurify} from 'dompurify';

@Component({
    selector: 'tb-doc-preview',
    template: ''
})

export class TbDocPreviewComponent {
    @Input() public document: String;

    constructor(private sanitizer: DomSanitizer) {
    }

    get processedDocument(): SafeHtml {
        console.log('document received into getProcessedDocument', document);
        if (this.document) {
            const sanitized = DOMPurify.sanitize(this.document, {FORBID_TAGS: ['script'], RETURN_DOM: true});
            const script = document.createElement('script');
            script.src = 'assets/js/iframeResizer.contentWindow.js';
            sanitized.appendChild(script);

            /* Return result */
            return this.sanitizer.bypassSecurityTrustHtml(sanitized.outerHTML);
        }
        return null;
    }
}