旧的y轴标签未被移除（chartjs，react-chartjs-2封装）

在更新图表数据之前，手动删除旧的y轴刻度标签。

例如，以下代码演示了如何删除旧的y轴刻度标签：

import React, { Component } from 'react';
import { Line } from 'react-chartjs-2';

class MyChart extends Component {
  constructor(props) {
    super(props);

    this.state = {
      chartData: {
        labels: ["January", "February", "March", "April", "May", "June", "July"],
        datasets: [
          {
            label: "My First Dataset",
            data: [65, 59, 80, 81, 56, 55, 40],
            fill: false,
            borderColor: "rgba(75,192,192,1)"
          }
        ]
      }
    };
  }

  componentDidUpdate() {
    // 删除旧的y轴刻度标签
    const chartNode = this.chartRef.current.chartInstance;
    chartNode.yAxis[0].options.ticks.display = false;
    chartNode.update();
  }

  render() {
    return (
      <div>
        <Line ref={ref => this.chartRef = ref} data={this.state.chartData} />
      </div>
    );
  }
}

export default MyChart;