score:4

Accepted answer

This could be solved by adding the options onAnimationComplete and tooltipevents.

onAnitmationComplete functions calls the showToolTip method to show the tooltips like a hover event does.

Usually tooltipevents are define to show tooltips but here an empty array need to be passed. Check the below fiddle example for line chart.

var options = {
  tooltipTemplate: "<%= value %>",

  showTooltips: true,

  onAnimationComplete: function() {
    this.showTooltip(this.datasets[0].points, true);
  },
  tooltipEvents: []
}

Note : This approach does not support multi data-sets in line and bar charts, but does support multi data-sets in pie charts

var data_line = {
  labels: ["January", "February", "March", "April", "May", "June", "July"],
  datasets: [{
    label: "My First dataset",
    fillColor: "rgba(220,220,220,0.2)",
    strokeColor: "rgba(220,220,220,1)",
    pointColor: "rgba(220,220,220,1)",
    pointStrokeColor: "#fff",
    pointHighlightFill: "#fff",
    pointHighlightStroke: "rgba(220,220,220,1)",
    data: [65, 59, 80, 81, 56, 55, 40]
  }]
};


var options = {
  tooltipTemplate: "<%= value %>",

  showTooltips: true,

  onAnimationComplete: function() {
    this.showTooltip(this.datasets[0].points, true);
  },
  tooltipEvents: []
}

var context = $('#chart3').get(0).getContext('2d');
var chart = new Chart(context).Line(data_line, options);
<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/1.0.2/Chart.min.js"></script>
<div id="chartContainer">
  <canvas id="chart3" width="500" height="500"></canvas>
</div>

score:0 

options: {
             legend: {
               display: false
             },
             hover: {
               animationDuration: 0
             },
             animation: {
               onComplete: function() {
                 const chartInstance = this.chart,
                   ctx = chartInstance.ctx;

                 ctx.font = Chart.helpers.fontString(
                   18,
                   Chart.defaults.global.defaultFontStyle,
                   Chart.defaults.global.defaultFontFamily
                 );
                 ctx.textAlign = "center";
                 ctx.textBaseline = "bottom";

                 this.data.datasets.forEach(function(dataset, i) {
                   const meta = chartInstance.controller.getDatasetMeta(i);
                   meta.data.forEach(function(bar, index) {
                     const data = dataset.data[index];
                     ctx.fillStyle = "#000";
                     ctx.fillText(data, bar._model.x, bar._model.y - 2);
                   });
                 });
               }
             },
             tooltips: {
               enabled: true
             },
             responsive: true,
             scales: {
               xAxes: [
                 {
                   display: true,
                   gridLines: {
                     drawOnChartArea: false
                   }
                 }
               ],
               yAxes: [
                 {
                   display: true,
                   gridLines: {
                     drawOnChartArea: false
                   },
                   ticks: {
                     precision: 0
                   }
                 }
               ]
             }
           }

Related Query

More Query from same tag