How to change scales title position in chart.js

by

👍:0

You cant achieve this by default, you will need to use a custom plugin for this:

const customTitle = {
  id: 'customTitle',
  beforeLayout: (chart, args, opts) => {
    if (!opts.x.display) {
      return;
    }

    const {
      ctx
    } = chart;
    ctx.font = opts.x.font || '12px "Helvetica Neue", Helvetica, Arial, sans-serif'

    const {
      width
    } = ctx.measureText(opts.x.text);
    chart.options.layout.padding.right = width * 1.3;
  },
  afterDraw: (chart, args, opts) => {
    const {
      ctx,
      scales: {
        x,
        y
      },
      chartArea: {
        top,
        bottom,
        left,
        right
      }
    } = chart;

    if (opts.x.display) {
      ctx.fillStyle = opts.x.color || Chart.defaults.color
      ctx.font = opts.x.font || '12px "Helvetica Neue", Helvetica, Arial, sans-serif'
      ctx.fillText(opts.x.text, (right + (opts.x.offsetX || 0)), (bottom + ((opts.x.offsetY * -1) || 0)))
    }

    if (opts.y.display) {
      ctx.fillStyle = opts.y.color || Chart.defaults.color
      ctx.font = opts.y.font || '12px "Helvetica Neue", Helvetica, Arial, sans-serif'
      ctx.fillText(opts.y.text, opts.y.offsetX || 3, (top + ((opts.y.offsetY * -1) || -15)))
    }
  }
}

const options = {
  type: 'line',
  data: {
    labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
    datasets: [{
        label: '# of Votes',
        data: [12, 19, 3, 5, 2, 3],
        borderWidth: 1
      },
      {
        label: '# of Points',
        data: [7, 11, 5, 8, 3, 7],
        borderWidth: 1
      }
    ]
  },
  options: {
    layout: {
      padding: {
        right: 0 // Seems neccesarry to put to 0, otherwise seems to not update padding
      }
    },
    plugins: {
      customTitle: {
        y: {
          display: true,
          text: 'Numbers'
        },
        x: {
          display: true,
          text: 'Month',
          offsetX: 5,
          offsetY: 5,
          font: '12px Comic Sans MS'
        }
      }
    }
  },
  plugins: [customTitle]
}

const ctx = document.getElementById('chartJSContainer').getContext('2d');
new Chart(ctx, options);
<body>
  <canvas id="chartJSContainer" width="600" height="400"></canvas>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.5.1/chart.js"></script>
</body>

Leave a comment