node.js中的Chart.js画布为空/白色

npm install jsdom

const { JSDOM } = require('jsdom');
const { document } = (new JSDOM('')).window;
global.document = document;

const Chart = require('chart.js');

const { JSDOM } = require('jsdom');
const { document } = (new JSDOM('')).window;
global.document = document;

const Chart = require('chart.js');

// 创建一个Canvas元素
const canvas = document.createElement('canvas');

// 设置Canvas的宽度和高度
canvas.width = 400;
canvas.height = 400;

// 获取2D上下文
const ctx = canvas.getContext('2d');

// 创建一个柱状图
new Chart(ctx, {
  type: 'bar',
  data: {
    labels: ['A', 'B', 'C'],
    datasets: [{
      label: 'Data',
      data: [10, 20, 30]
    }]
  }
});