[Webkit-unassigned] [Bug 189330] New: audio.duration returns "Infinity"

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=189330

            Bug ID: 189330
           Summary: audio.duration returns "Infinity"
           Product: WebKit
           Version: Safari 11
          Hardware: iPhone / iPad
                OS: iOS 11
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: drew at drewd3v.net

Created attachment 348990

  --> https://bugs.webkit.org/attachment.cgi?id=348990&action=review

Alert that appears with test code.

When using audio.duration on iOS, Mac, other Safari supported devices, it will return "Infinity."
This occurs on iOS 12 and below.
This can be easy to reproduce, with code, provided below.

<audio id="audio" ontimeupdate="test()" src="myaudio.mp3">
<script>
function test(){
      let audio = document.getElementId("audio");
      alert(audio.duration);
}
</script>

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