How to make curve LineChart not go outside

[Trung15010802]

How to make LineChart not go outside?

My code:

LineChartBarData get lineChartBarData1_1 => LineChartBarData(
      isCurved: true,
      color: Colors.blue,
      // barWidth: 8,
      isStrokeCapRound: true,
      dotData: const FlDotData(show: true),
      belowBarData: BarAreaData(show: false),
      spots: const [
        FlSpot(1, 1),
        FlSpot(3, 1.5),
        FlSpot(5, 1.4),
        // FlSpot(7, 3.4),
        // FlSpot(10, 2),
        // FlSpot(12, 2.2),
        // FlSpot(13, 1.8),
      ],
    );

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: LineChart(
        LineChartData(lineBarsData: lineBarsData1),
      ),
    );
  }
}

[Trung15010802]

preventCurveOverShooting: true