各位
我正在将 react-chartjs-2 从v2迁移到v5，但是，这是我的代码，我丢失了渐变颜色，这在v5中不起作用。并且无法找出错误或遗漏了什么。我正在分享代码。请帮助我解决这个问题。
这是我的v2代码|旧码

import React from 'react';
import { Line as LineChart } from 'react-chartjs-2';
import { formatCurrency } from './../util';

const DashboardChart = ({ salesData }) => {
  const chartLabels = salesData.map(sale => sale.date);
  const chartValues = salesData.map(sale => sale.amount);

  const chartData = canvas => {
    const ctx = canvas.getContext('2d');
    var gradientFill = ctx.createLinearGradient(
      0,
      0,
      0,
      250
    );
    gradientFill.addColorStop(0, 'rgba(0, 97, 215, 0.3)');
    gradientFill.addColorStop(1, 'rgba(0, 200, 255, 0)');
    console.log(gradientFill)
    return {
      labels: chartLabels,
      datasets: [
        {
          label: 'Sales',
          borderColor: '#3182ce',
          data: chartValues,
          backgroundColor: gradientFill
        }
      ]
    };
  };

  return (
    <LineChart
      height={100}
      data={chartData}
      options={{
        elements: {
          line: {
            tension: 0.3,
            borderWidth: 1.5
          },
          point: { radius: 0 }
        },
        scales: {
          yAxes: [
            {
              ticks: {
                callback: value => formatCurrency(value)
              }
            }
          ]
        }
      }}
    />
  );
};

export default DashboardChart;

这是我的v5代码|最新代码

import React, { useEffect, useRef } from 'react';
import { Line } from 'react-chartjs-2';
import { formatCurrency } from '../util';

import {
  Chart as ChartJS,
  CategoryScale,
  LinearScale,
  PointElement,
  LineElement,
  Title,
  Tooltip,
  Legend,
  Filler
} from 'chart.js';

ChartJS.register(
  CategoryScale,
  LinearScale,
  PointElement,
  LineElement,
  Title,
  Tooltip,
  Legend,
  Filler
);

const useCanvasGradient = (canvasRef, chartValues) => {
  useEffect(() => {
    const canvas = canvasRef.current;
    const ctx = canvas?.getContext('2d');

    if (ctx) {
      const gradientFill = ctx.createLinearGradient(0, 0, 0, 250);
      gradientFill.addColorStop(0, 'rgba(0, 97, 215, 0.3)');
      gradientFill.addColorStop(1, 'rgba(0, 200, 255, 0)');

      ctx.fillStyle = gradientFill;
      ctx.fillRect(0, 0, canvas.width, canvas.height);

      // Set the background color of the chart to the canvas pattern
      chartValues.backgroundColor = ctx.createPattern(canvas, 'repeat');
    }
  }, [canvasRef, chartValues]);
};

const DashboardChart = ({ salesData }) => {
  const chartLabels = salesData.map(sale => sale.date);
  console.log(JSON.stringify(chartLabels))
  const chartValues = {
    label: 'Sales',
    borderColor: '#3182ce',
    data: salesData.map(sale => sale.amount),
  };
  console.log(JSON.stringify(chartValues))
  const canvasRef = useRef(null);

  useCanvasGradient(canvasRef, chartValues);

  const chartData = {
    labels: chartLabels,
    datasets: [chartValues],
  };

  const options = {
    responsive: true,
    elements: {
      line: {
        tension: 0.3,
        borderWidth: 1.5,
      },
      point: { radius: 0 },
    },
    scales: {
      y: {
        ticks: {
          callback: value => formatCurrency(value),
        },
      },
    },
  };

  return (
    <>
      <canvas ref={canvasRef} id="canvasId" width={500} height={500} style={{ display: 'none' }} />
      <Line
        height={100}
        data={salesData ? chartData : null}
        options={options}
      />
    </>
  );
};

export default DashboardChart;

我也分享v2和v5的截图

v2截图x1c 0d1x
这里是v5截图

Also sharing live code URL🔗
这里是另一个活生生的例子，只是重新验证了我使用的颜色是正确的或不使用vanilaJS -Live Example