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  1. Qt
  2. QTBUG-79342

Allow binding to members of JavaScript objects and arrays

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    Description

      Currently the following binds a to the initial value of b.c, but doesn't update a when b.c is updated. This is highly surprising and runs counter to our understanding of bindings:

      QtObject {
    property var b: ({c : 10})
    property var a: b.c

    signal somethingHappened
    onSomethingHappened: function() { ++b.c }
}

      The same effect can be seen for JavaScript arrays in var properties. We should either not allow such bindings in the first place (syntax for declarative one-time assignment might come in handy), or, preferably, properly update the binding when the source changes.

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          relates to

          Task - A task that needs to be done. QTBUG-21844 Support bindable JavaScript objects

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Open

          Task - A task that needs to be done. QTBUG-76975 Allow non-binding declarative property assignment in QML

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Open

          Suggestion - Public suggestions QTBUG-12117 Add support for JS arrays in ListModel

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Open
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              qtqmlteam Qt Qml Team User
              ulherman Ulf Hermann
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                Created:
                Updated:

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