[Webkit-unassigned] [Bug 194322] New: Add Array.prototype.{flat, flatMap} to unscopables

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=194322

            Bug ID: 194322
           Summary: Add Array.prototype.{flat,flatMap} to unscopables
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: msaboff at apple.com

These methods have been added to the ES spec. According to the spec pull request (https://github.com/tc39/ecma262/pull/1309) and to conform to the other JS engines, we should add these properties to @@unscopables.  The text below the `Array.prototype[@@unscopables]` section in the ES spec makes it clear that the intention is to *prevent* issues.

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