How to position yAxes labels in chartJS

问题

I want to align the y-axis tick labels above the ticks in chartJS.

Here's what I've got so far:

I want the tick labels 0M, 20M, and 40M above the tick labels. Something like this:

Here's my chart config:

new Chart(ctx, {
    type: 'bar',
    data,
    options: {
      ...
      scales: {
        xAxes: [{ ... }],
        yAxes: [{
          stacked: true,
          position: 'right',
          gridLines: {
            drawBorder: false
          },
          ticks: {
            maxTicksLimit: 3
          }
        }]
      }
    }
  })

I'm not able to find any option in the chart options to do such a thing. Please help

回答1:

You can do this by adding an animation to the options config:

options: {
    animation: {
        duration: 1,
        onComplete: function() {
            var controller = this.chart.controller;
            var chart = controller.chart;
            var yAxis = controller.scales['y-axis-0'];

            yAxis.ticks.forEach(function(value, index) {
                var xOffset = chart.width - 40;
                var yOffset = ((chart.height - 60) / 2 * index) + 15;
                ctx.fillText(value + 'M', xOffset, yOffset);
            });   
        }
    }
}

JSFiddle Demo: https://jsfiddle.net/m5tnkr4n/1/

You may need to adjust the hardcoded numbers in the xOffset and yOffset. These numbers will depend on the height and width of your chart, as well as what features you are displaying the in the canvas area. For example, if you remove the xAxes tick labels, you many need to decrease the -60 since that will make the chart slightly shorter. / 2 works since you set the maxTicksLimit to 3.

来源：https://stackoverflow.com/questions/43677197/how-to-position-yaxes-labels-in-chartjs