Angular 6+ binding [src] in ngx-extended-pdf-viewer

Question

I'm using ngx-extended-pdf-viewer ( npm ) to render a PDF and it works when i set directly the path+fileName, as below:

 <ngx-extended-pdf-viewer [src]="'assets/example.pdf'" 
            [showPrintButton]="false" [showBookmarkButton]="false"
            [showOpenFileButton]="false" 
            [showSidebarOnLoad]="false"
            [showSidebarButton]="true" 
            delayFirstView="6000" useBrowserLocale="false">
          </ngx-extended-pdf-viewer>

I'd like to create a variable in .TS and binding it in [src] like below:

Typescript

...
ngOnInit() {
    this.filePathAndName = "'assets/example.pdf'";
...

HTML

 <ngx-extended-pdf-viewer [src]="{{filePathAndName}}" 
            [showPrintButton]="false" [showBookmarkButton]="false"
            [showOpenFileButton]="false" 
            [showSidebarOnLoad]="false"
            [showSidebarButton]="true" 
            delayFirstView="6000" useBrowserLocale="false">
          </ngx-extended-pdf-viewer>

But It doesn't work.

The major problem is the [ src ] needs to have the two symbols: Quotation marks ( " ) following by Apostrophe ( ' ) ... " ' path+name ' " (without the spaces)

My question is : How can I put a valid value in a variable in Typescript to render properly in HTML in this specific scenario ?

Answer 1

It doesn't need those quotation marks. Those are only for literal string bindings. Try this:

this.filePathAndName = "assets/example.pdf";

<ngx-extended-pdf-viewer *ngIf="filePathAndName" [src]="filePathAndName" 

Answer 2

May be am late to reply, will be helpful for someone in future.

HTML code :

  <ngx-extended-pdf-viewer *ngIf="currentPdf"
    [src]="currentPdf" useBrowserLocale="false"
    style="height: 100%; width: 100%"
    [delayFirstView]="1000"
    [showHandToolButton]="true"
    [handTool] = false>
  </ngx-extended-pdf-viewer>

Typescript code:

public currentPdf: string

displayPdf() {

    // setTimeout(() => {
      this.service.getPdfExtractedContent(this.id)
        .pipe(first())
        .subscribe(
          data => {
            this.currentPdf = URL.createObjectURL(this.b64toBlob(data.ExtractedByte,'data:application/pdf;base64', 1024));

          },
          error => {
            console.log(error);
          }
        );
    // }, 500);

  }


  b64toBlob(b64Data, contentType, sliceSize) {
    const byteCharacters = atob(b64Data);
    const byteArrays = [];

    for (let offset = 0; offset < byteCharacters.length; offset += sliceSize) {
      const slice = byteCharacters.slice(offset, offset + sliceSize);

      const byteNumbers = new Array(slice.length);
      for (let i = 0; i < slice.length; i++) {
        byteNumbers[i] = slice.charCodeAt(i);
      }

      const byteArray = new Uint8Array(byteNumbers);
      byteArrays.push(byteArray);
    }

    const blob = new Blob(byteArrays, {type: contentType});
    return blob;
  }