pdf_web_view_view.dart

import 'dart:html' as html;

import 'package:flutter/material.dart';
import 'dart:ui' as ui;

import './pdf_web_view_view_model.dart';

class PdfWebViewView extends PdfWebViewViewModel {
  String samplePdf = "http://www.africau.edu/images/default/sample.pdf";

  @override
  void initState() {
    super.initState();
    registerView(pdfKey, "http://www.africau.edu/images/default/sample.pdf");
  }

  Future<void> registerView(String key, String url) async {
    // ignore: undefined_prefixed_name
    await ui.platformViewRegistry.registerViewFactory(
        key,
        (int viewId) => html.IFrameElement()
          ..allowFullscreen = true
          ..src = '$url'
          ..style.border = 'none');
  }

  String pdfKey = "key";
  String pdfKey2 = "key2";

  @override
  Widget build(BuildContext context) {
    // Replace this with your build function
    return Scaffold(
      appBar: AppBar(
        actions: <Widget>[
          FloatingActionButton(
            onPressed: () async {
              pdfKey = 'veli';
              await registerView('veli',
                  "https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf");
              setState(() {});
            },
          )
        ],
      ),
      body: HtmlElementView(viewType: pdfKey),
    );
  }
}