Chart.js图表未显示

debugcn 发表于 Dev

马修·凯斯（Matthew Keys）

我正在尝试并测试一个简单的chart.js图表，但是无论如何我似乎都无法显示该图表。

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/Chart.min.js"></script>
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
  <title>My Chart.js Chart</title>
</head>
<body>
  <div class="container">
    <canvas id="myChart" width="600" height="400"></canvas>
  </div>

  <script>
    var myChart = document.getElementByID('myChart').getContext('2d');

    var spiderChart = new Chart(myChart, {
      type: 'bar',
      data: {
        labels:['Happiness', 'Organization', 'Communication', 'Leader'],
        datasets:[{
            label: 'Statistics',
            data: [10, 20, 55, 30]
          }]
      }
    });
  </script>

</body>
</html>

yan

简单的Typeo问题：）。您应该使用getElementById而不是getElementByIDon document。

工作示例：

var myChart = document.getElementById('myChart').getContext('2d');  // The problem was here

    var spiderChart = new Chart(myChart, {
      type: 'bar',
      data: {
        labels:['Happiness', 'Organization', 'Communication', 'Leader'],
        datasets:[{
            label: 'Statistics',
            data: [10, 20, 55, 30]
          }]
      }
    });

<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/Chart.min.js"></script>
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
  <title>My Chart.js Chart</title>
</head>
<body>
  <div class="container">
    <canvas id="myChart" width="600" height="400"></canvas>
  </div>


</body>
</html>

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