QJSPrimitiveUndefined Struct
空标记类型，用于表示 JavaScript 未定义类型及其单一值。更多
| 头文件： | #include <QJSPrimitiveUndefined> |
| CMake： | find_package(Qt6 REQUIRED COMPONENTS Qml)target_link_libraries(mytarget PRIVATE Qt6::Qml) |
| qmake： | QT += qml |
| 自 | Qt 6.1 |
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