javascript 在Chart.js中的条形图上显示数据标签

mec1mxoz 于 2022-12-17 发布在 Java

关注(0)|答案(3)|浏览(275)

关于水平条形图，我有一个非常特殊的问题。是否可以在条形图上显示数据标签？
就像这张照片：Drawing of the charts
我试着这样做：

ticks: {
   padding: -xx,
}

但不幸的是，标签在条形图下面消失了，就像条形图在标签上面的一层一样。
有可能改变吗？
下面是我的代码：

var ctx = document.getElementById("stakeholderChart").getContext('2d');
var stakeholderChart = new Chart(ctx, {
    type: 'horizontalBar',
    data: {
        labels: ["Point 1", "Point 2", "Point 3", "Point 4", "Point 5", "Point 6", "Point 7", "Point 8", "Point 9", "Point 10", "Point 11", "Point 12"],
        datasets: [{
            backgroundColor: "#527a82",
            data: [74, 74, 68, 67, 65, 63, 60, 60, 58, 57, 45, 44],
        }],

    },
    options: opt
});

and my options:

    var opt = {
        /*Legende ausblenden*/
        legend: {
            display: false,
        },
        /*responsive*/
        responsive: true,

        /*tooltips - hover labels*/
        tooltips: {
            enabled: false,
        },

        /*Layout*/
        layout: {
            padding: {
                right: 30,
            }
        },

        /* Label auf Balken – Werte hinter balken*/
        plugins: {
            datalabels: {
                align: 'end',
                anchor: 'end',
                color: '#fff',
                font: {
                    weight: 'bold',
                    size: 14,
                },
                formatter: function(value, context) {
                    return value + '%';
                },
            },
        },
        /*Plugins ende*/

        /*Animation*/
        animation: {
            duration: 2000
        },
        /*Animation Ende*/

        /*Achsen Einstellungen*/
        scales: {
            /* x Achse */
            xAxes: [{
                display: false,
                gridLines: {
                    display: false
                },

                ticks: {
                    beginAtZero: true,
                    max: 90,
                }

            }],
            /*x-axes ende*/

            /* Y Achse */
            yAxes: [{
                display: true,
                gridLines: {
                    display: false,
                },

                ticks: {
                    fontColor: '#fff',
                    fontStyle: 'normal',
                    fontSize: 13,
                    padding: -170,
                },
                categoryPercentage: 1.0,
                barPercentage: 0.85,

            }],
            /* y-axes ende*/
        },
        /*Scales Ende*/
    }

提前感谢您！

JavaScript

来源：https://stackoverflow.com/questions/51726257/show-data-labels-on-the-bar-in-chart-js

3条答案

按热度按时间

lawou6xi1#

yAxes: [{
                display: true,
                gridLines: {
                    display: false,
                },

                ticks: {
                    fontColor: '#fff',<-- Text is currently white, change to black
                    fontStyle: 'normal',
                    fontSize: 13,
                    padding: -170,,<-- set to 0 or remove
                },
                categoryPercentage: 1.0,
                barPercentage: 0.85,

            }],/* y-axes ende*/

赞(0）回复(0）举报 2022-12-17

y53ybaqx2#

在代码中添加如下选项

options:  {
"hover": {
                      "animationDuration": 0
                    },
                    "animation": {
                      "duration": 1,
                      "onComplete": function() {
                        var chartInstance = this.chart
                        ctx = chartInstance.ctx;
                        ctx.font = Chart.helpers.fontString(Chart.defaults.global.defaultFontSize, Chart.defaults.global.defaultFontStyle, Chart.defaults.global.defaultFontFamily);
                        ctx.fillStyle = this.chart.config.options.defaultFontColor;
                        ctx.textAlign = 'left';
                        ctx.textBaseline = 'bottom';

                        this.data.datasets.forEach(function(dataset, i) {
                          var meta = chartInstance.controller.getDatasetMeta(i);
                          meta.data.forEach(function(bar, index) {
                                var data = dataset.data[index];
                                ctx.fillText(data, bar._model.x, bar._model.y - 5);
                          });
                        });
                      }
                    },

} 
});

或访问https://jsfiddle.net/tushar22/bfd98r26/5/

赞(0）回复(0）举报 2022-12-17

sg3maiej3#

对于水平条形图，只需启用'mirror'选项：

options: {
    scales: {
        yAxes: [{
            ticks: {
                mirror: true //Show y-axis labels inside horizontal bars
            }
        }]
    }
}

查看文档：https://www.chartjs.org/docs/latest/axes/cartesian/#tick-configuration
“* 围绕坐标轴翻转刻度标签，显示图表内部的标签而不是外部的标签。注意：仅适用于垂直刻度。*”

赞(0）回复(0）举报 2022-12-17

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javascript 在Chart.js中的条形图上显示数据标签

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