subscript(_:)

Declaration

subscript<Key>(key: Key.Type) -> Key.Value where Key : ContainerValueKey { get set }

Overview

Create a custom container value by declaring a new property in an extension to the container values structure and applying the Entry() macro to the variable declaration:

extension ContainerValues {
    @Entry var myCustomValue: String = "Default value"
}

You use custom container values the same way you use system-provided values, setting a value with the containerValue(_:_:) view modifier, and reading values from a Subview provided by the subviews modifier. You can also provide a dedicated view modifier as a convenience for setting the value:

extension View {
    func myCustomValue(_ myCustomValue: String) -> some View {
        containerValue(\.myCustomValue, myCustomValue)
    }
}