javascript - Chart.js 中不显示条形图

Question

我是尝试 Chart.js 的初学者，但在显示条形图时遇到问题。当我尝试运行此代码时，我得到的只是一个空白屏幕，知道为什么吗？

<div id="chart">
<canvas id="myGraph" width="400" height="400"></canvas>
</div>

<script>
var myData = {
        labels: ["2000", "2001", "2002", "2003"],
        datasets: [{
        label: 'Test chart',
        data: [20, 50, 10, 12],
        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
    }]
   },
});

var ctx = document.getElementById("myGraph").getContext("2d");
var debt = new Chart(ctx).Bar(myData);

</script>

Answer 1

您的 JSON 文字中有几个拼写错误。我像这样重写了它(请参阅 here 的 JSFiddle)

var config = {
        type: 'bar',
        data: {
        labels: ["2000", "2001", "2002", "2003"],
        datasets: [{
        label: 'Test chart',
        data: [20, 50, 10, 12],
        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
    }]
  }
};
var ctx = document.getElementById("myGraph");
var debt = new Chart(ctx, config);