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  1. Qt
  2. QTBUG-79868

'instanceof' throws when left-hand side is not QObject instance

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    • ee8589dd9a681a469511308345e4ef0b304aaaab (qt/qtdeclarative/5.15)

    Description

      The 'instanceof' operator in QML engine throws unexpectedly comparing to browser behavior and the MDN document:

      // throw 'TypeError' in QML engine:
     null instanceof QtObject; // false
undefined instanceof QtObject; // false
       {} instanceof QtObject; // false
       "" instanceof QtObject; // false
        9 instanceof QtObject; // false
     true instanceof QtObject; // false

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            fabiankosmale Fabian Kosmale
            gpbeta Joshua GPBeta
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              Resolved:

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