javascript - Chart.js 无法创建图表

Question

我正在尝试使用 Chart.js 创建一个简单的条形图，但每次我尝试呈现它时，都会出现以下错误:无法创建图表:无法从给定项目获取上下文。

  var hashtags = ["activewear", "adidas", "aloyoga", "batterseapark", "outdoors", "park", "training", "winter", "workout", "workoutwednesday"]
var avg_likes = [1185, 5311, 5521, 1713, 949, 321, 2860, 2661, 18899, 8108]

var chart = document.getElementById("chart");
var myBarChart = new Chart(chart, {
  type: 'bar',
  data: {
    labels: hashtags,
    datasets: [{
      data: avg_likes
    }]
  },
  options: {}
}); 

    <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.2/Chart.min.js"></script>

<div id="chart"></div>

Answer 1

您必须添加一个 Canvas 元素作为图表的基础。将 html 更改为:

<div class="chart-container">
   <canvas id="chart"></canvas>
</div>