个人中心
gpt4 book ai didi

javascript - 使用 chart.js 在一页中显示多个图表

转载 作者：行者123 更新时间：2023-11-30 07:50:58 25 4
gpt4 key购买 nike

我使用 chart.js 及其依赖项 jQuery 来绘制图表。就我而言，我的一个页面中需要 2 个圆环图，这是我的代码:

<!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://code.jquery.com/jquery-3.3.1.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.3/Chart.js"></script>

    <title>Document</title>
    <script>
        $(function () {
            var ctx = document.getElementById("layanan").getContext('2d');
            var data = {
                datasets: [{
                    data: [10, 20, 30],
                    backgroundColor: [
                        '#3c8dbc',
                        '#f56954',
                        '#f39c12',
                    ],
                }],
                labels: [
                    'Request',
                    'Layanan',
                    'Problem'
                ]
            };
            var myDoughnutChart = new Chart(ctx, {
                type: 'doughnut',
                data: data,
                options: {
                    maintainAspectRatio: false,
                    legend: {
                        position: 'bottom',
                        labels: {
                            boxWidth: 12
                        }
                    }
                }
            });

            var ctx_2 = document.getElementById("layanan_subbagian").getContext('2d');
            var data_2 = {
                datasets: [{
                    data: [10, 20, 30],
                    backgroundColor: [
                        '#3c8dbc',
                        '#f56954',
                        '#f39c12',
                    ],
                }],
                labels: [
                    'Request',
                    'Layanan',
                    'Problem'
                ]
            };
            var myDoughnutChart_2 = new Chart(ctx_2, {
                type: 'doughnut',
                data: data_2,
                options: {
                    maintainAspectRatio: false,
                    legend: {
                        position: 'bottom',
                        labels: {
                            boxWidth: 12
                        }
                    }
                }
            });
        });

    </script>
</head>

<body>
    <canvas id="layanan" width="240" height="240"></canvas>
    <canvas id="layanan_subbagian" width="240" height="240"></canvas>
</body>

</html>

当我只有一个图表时，没有任何问题，但是当我尝试添加一个图表时，我的图表变得太大，我的页面布局变得太乱了。你们能找出我的代码有什么问题吗？谢谢。

最佳答案

根据 chartjs 文档:

Detecting when the canvas size changes can not be done directly from the CANVAS element. Chart.js uses its parent container to update the canvas render and display sizes. However, this method requires the container to be relatively positioned and dedicated to the chart canvas only. Responsiveness can then be achieved by setting relative values for the container size

来源:https://www.chartjs.org/docs/latest/general/responsive.html

您应该将 Canvas 包裹到 div 中并在其中添加宽​​度和高度。

这是我做的改变

<div style="width:240px;height:240px">
    <canvas id="layanan"></canvas>
    </div>
    <div style="width:240px;height:240px">
    <canvas id="layanan_subbagian" ></canvas>
    </div>

$(function () {
            var ctx = document.getElementById("layanan").getContext('2d');
            var data = {
                datasets: [{
                    data: [10, 20, 30],
                    backgroundColor: [
                        '#3c8dbc',
                        '#f56954',
                        '#f39c12',
                    ],
                }],
                labels: [
                    'Request',
                    'Layanan',
                    'Problem'
                ]
            };
            var myDoughnutChart = new Chart(ctx, {
                type: 'doughnut',
                data: data,
                options: {
                    maintainAspectRatio: false,
                    legend: {
                        position: 'bottom',
                        labels: {
                            boxWidth: 12
                        }
                    }
                }
            });

            var ctx_2 = document.getElementById("layanan_subbagian").getContext('2d');
            var data_2 = {
                datasets: [{
                    data: [10, 20, 30],
                    backgroundColor: [
                        '#3c8dbc',
                        '#f56954',
                        '#f39c12',
                    ],
                }],
                labels: [
                    'Request',
                    'Layanan',
                    'Problem'
                ]
            };
            var myDoughnutChart_2 = new Chart(ctx_2, {
                type: 'doughnut',
                data: data_2,
                options: {
                    maintainAspectRatio: false,
                    legend: {
                        position: 'bottom',
                        labels: {
                            boxWidth: 12
                        }
                    }
                }
            });
        });
<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://code.jquery.com/jquery-3.3.1.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.3/Chart.js"></script>

    <title>Document</title>
    

    <div style="width:240px;height:240px">
    <canvas id="layanan"></canvas>
    </div>
    <div style="width:240px;height:240px">
    <canvas id="layanan_subbagian" ></canvas>
    </div>

关于javascript - 使用 chart.js 在一页中显示多个图表，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53172262/

25 4 0
文章推荐： javascript - 在 React 中提交后重定向
文章推荐： java - Spring应用程序无法识别
文章推荐： java - 如何修复 jframe 上的空白屏幕并从文本字段设置 vgap 和 hgap 的值
文章推荐： Javascript - 将嵌套数组转换为数组对象
行者123
个人简介

我是一名优秀的程序员,十分优秀！

滴滴打车优惠券免费领取
滴滴打车优惠券
全站热门文章
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com