SwiftUIの状態管理について

//
import SwiftUI

struct HomeView: View {
    @State var memoDataList: [String] = []

    var body: some View {
        NavigationStack {
            VStack {
                memoList
                Spacer()
            }
        }
        .onAppear {
            memoDataList = ["バナナを買う", "本を読む", "散歩する"]
        }
    }

    /// メモ一覧.
    var memoList: some View {
        List {
            ForEach(memoDataList, id: \.self) { memo in
                Text(memo)
            }
        }
        .listStyle(.plain)
    }
}

#Preview {
    HomeView()
}