howler.js dart:js_interop binding

usage

1、add howler.js to index.html

  <!-- <script src="https://cdn.jsdelivr.net/npm/howler@2.2.4/dist/howler.min.js"></script> -->
  <script src="assets/js/howler.min.js"></script>
  <script src="assets/js/howler.spatial.min.js"></script>

2、import howle and use it

import 'package:howle/howle.dart';
Howl howl = Howl(HowlOptions(src: 'https://black_swan.mp3'.toJS));
howl.play();
howl.stop();