ChartJs 标题不显示

Question

我正在使用 ChartJS 2.6.0 版。我在使用图表的“标题”选项时遇到了一些困难。它根本没有显示在呈现的图表上。我正在关注 文档，并按照说明传递标题：

 var options = {
    type: 'line',
    data: data,
    title: {
        display: true,
        text: 'PLEASE DISPLAY FOR HEAVEN\'S SAKE'
    },
    responsive: true,
    bezierCurve: true,
    legend: {
        display: true,
        labels: {
            fontColor: 'rgb(255, 99, 132)'
        }
    },
    pointHitDetectionRadius: 1,
    events: ['click']
}

var canvas = document.getElementById("chartId");
var ctx = canvas.getContext("2d");
var chart = new Chart(ctx, options);

但是，标题根本不会显示。这是一个带有圆环图的 小提琴，它有同样的问题。我在这里错过了什么？

原文由 MichaelCleverly 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

您需要将 title 对象包装在 options 对象中，例如

var myChart = new Chart(ctx, {
    type: 'doughnut',
    options: {
        plugins: {
            title: {
                display: true,
                text: 'TEST'
            }
        }
    }
....

以下是所有选项的完整列表的文档， chartjs:title

 var data = [2137680, 6282693, 805566, 2568163, 598599, 3189284, 599112, 926340, 5548295, 11847685, 66445];
var labels = ["Management", "Finance", "Human Resources", "Business Development and Marketing", "Information Technology", "Professional Development and Training", "Knowledge Management", "Logistics", "Support", "Business Services", "Other"];
var bgColor = ["#878BB6", "#FFEA88", "#FF8153", "#4ACAB4", "#c0504d", "#8064a2", "#772c2a", "#f2ab71", "#2ab881", "#4f81bd", "#2c4d75"];

var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
  type: 'doughnut',
  options: {
    title: {
      display: true,
      text: 'TEST'
    }
  },
  data: {
    labels: labels,
    datasets: [{
      data: data,
      backgroundColor: bgColor
    }]
  }
});

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.min.js"></script>
<canvas id="myChart" width="400" height="400">
</canvas>

https://jsfiddle.net/unf4exa2/

原文由 Quince 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 2

请尝试在标题中添加选项对象

https://jsfiddle.net/Jaffreena/ha19ozqy/93/

 var data = [2137680, 6282693, 805566, 2568163, 598599, 3189284, 599112, 926340, 5548295, 11847685, 66445];
var labels = ["Management", "Finance", "Human Resources", "Business Development and Marketing", "Information Technology", "Professional Development and Training", "Knowledge Management", "Logistics", "Support", "Business Services", "Other"];
var bgColor = ["#878BB6", "#FFEA88", "#FF8153", "#4ACAB4", "#c0504d", "#8064a2", "#772c2a", "#f2ab71", "#2ab881", "#4f81bd", "#2c4d75"];

var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
    type: 'doughnut',

    data: {

        labels: labels,
        datasets: [{
            data: data,
            backgroundColor: bgColor
        }]
    },
    options: {
        title: {
            display: true,
            text: 'Custom Chart Title'
        }
    }
});

原文由 Jaffreena Michael Thomas 发布，翻译遵循 CC BY-SA 4.0 许可协议