ChartContentView4.swift

Chart(data) {
    LineMark(
        x: .value("Category", $0.category),
        y: .value("Value", $0.value)
    )
    .foregroundStyle(.blue)
  }
  .chartBackground { chartProxy in
                
    Color.green
        .onAppear {
            print(chartProxy.plotAreaFrame)
            print(chartProxy.plotAreaSize)
            print(chartProxy.position(for: (x: 64, y: 46)))
        }
}