小编use*_*378的帖子

您能告诉我在ChartJS选项中添加什么才能将图例标题也添加到工具提示标题中吗？\n在所附的屏幕截图中，您可以看到我想在工具提示的标题中添加年份提醒。

                 var chartdata = {\n                 labels: [\'Jan\',\'Fev\',\'Mar\',\'Avr\',\'Mai\',\'Jui\',\'Jui\',\'Aou\',\'Sep\',\'Oct\',\'Nov\',\'Dec\'],\n                 datasets: JSON.parse(\'<?php echo $datasets ?>\')\n             };\n\n               var graphTarget = $("#graphCanvas");\n\n               var barGraph = new Chart(graphTarget, {\n                   type: \'bar\',\n                   data: chartdata,\n                   options: {\n                            responsive: true,\n                            legend: {\n                                position: \'right\',\n                            },\n                            title: {\n                                display: true,\n                                text: \'Consommation \xc3\xa9lectrique\'\n                            },\n                    tooltips: {\n                      enabled: true,\n                      mode: \'single\',\n                      callbacks: {\n                          label: function(tooltipItems, data) {\n                              return tooltipItems.yLabel + \' kW\';\n                          }\n                      }\n                    },\n                    scales: {\n                      yAxes: [{\n                          ticks: {\n                              // Includes \'kW\' after the value\n                              callback: …