[Webkit-unassigned] [Bug 226201] New: Can't extend WritableStream

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=226201

            Bug ID: 226201
           Summary: Can't extend WritableStream
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jimmy at warting.se

Using Safari TP, with experimental WritableStream enabled...

I'm having trouble extending the WritableStream class...

class A extends WritableStream { foo() {} }
new A().foo()

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