ChartJS宽度在React Typescript中未定义

import React, { Component } from 'react';
import Chart from 'chart.js';

class ChartComponent extends Component {
  chartRef = React.createRef<HTMLCanvasElement>();

  componentDidMount() {
    this.createChart();
  }

  createChart() {
    const chartCanvas = this.chartRef.current;
    if (chartCanvas) {
      new Chart(chartCanvas, {
        type: 'bar',
        data: {
          labels: ['Red', 'Blue', 'Yellow', 'Green', 'Purple', 'Orange'],
          datasets: [{
            label: '# of Votes',
            data: [12, 19, 3, 5, 2, 3],
            backgroundColor: [
              'rgba(255, 99, 132, 0.2)',
              'rgba(54, 162, 235, 0.2)',
              'rgba(255, 206, 86, 0.2)',
              'rgba(75, 192, 192, 0.2)',
              'rgba(153, 102, 255, 0.2)',
              'rgba(255, 159, 64, 0.2)'
            ],
            borderColor: [
              'rgba(255, 99, 132, 1)',
              'rgba(54, 162, 235, 1)',
              'rgba(255, 206, 86, 1)',
              'rgba(75, 192, 192, 1)',
              'rgba(153, 102, 255, 1)',
              'rgba(255, 159, 64, 1)'
            ],
            borderWidth: 1
          }]
        },
        options: {
          responsive: true,
          maintainAspectRatio: false,
          scales: {
            y: {
              beginAtZero: true
            }
          }
        }
      });
    }
  }

  render() {
    return <canvas ref={this.chartRef} />;
  }
}

export default ChartComponent;