Log any errors that occur during JavaScript evaluation
Log any errors that occur during JavaScript evaluation

Not logging the NSError because its output isn't useful:

  Error Domain=WKErrorDomain Code=4
    "A JavaScript exception occurred"

turbolinks/turbolinks-ios,turbolinks/turbolinks-ios,turbolinks/turbolinks-ios,turbolinks/turbolinks-ios,turbolinks/turbolinks-ios