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javascript - 将数组中的数据插入饼图 (chart.js)

问题描述

我有 2 个要插入饼图的数据数组。

所以我有这个代码：

new Chart(document.getElementById("pie-chart"), {
    type: 'pie',
    data: {
      labels: ["Africa", "Asia", "Europe", "Latin America", "North America"],
      datasets: [{
        label: "Population (millions)",
        backgroundColor: ["#3e95cd", "#8e5ea2","#3cba9f","#e8c3b9","#c45850"],
        data: [2478,5267,734,784,433]
      }]
    },
    options: {
      title: {
        display: true,
        text: 'Predicted world population (millions) in 2050'
      }
    }
});

我不想写标签和数据，而是想从 2 个数组（一个用于标签，一个用于数据）中获取此信息。我该怎么做？

标签： javascripthtmlchart.js

解决方案

请使用为您创建的以下 jsfiddle ，这可能会对您有所帮助。

https://jsfiddle.net/ua5hsj7k/

<!DOCTYPE html>
<html>
<head>
<title>ChartJS - Pie</title>
<link type="text/css" rel="stylesheet" href="css/default.css" />
</head>
<body>
<div class="chart-container">
<div class="pie-chart-container">
  <canvas id="pie-chartcanvas-1"></canvas>
</div>


  </div>

   <!-- javascript -->
   <script src="https://cdn.jsdelivr.net/npm/chart.js@2.8.0"></script>
  </body>
   </html>

# js文件中的代码

    var piechart = $("#pie-chartcanvas-1");

   var data1 = {
   labels: ["Africa", "Asia", "Europe", "Latin America", "North America"],
   datasets: [
   {
    label: "Population (millions)",
    backgroundColor: 
    ["#3e95cd", "#8e5ea2","#3cba9f","#e8c3b9","#c45850"],
    data: [2478,5267,734,784,433]
     }
     ]
     };

   var chart = new Chart(piechart,{
   type:"pie",
   data : data1,
   options:{}
    })

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