Is there a way to adjust only the bottom padding of a chart's title in Chart.js?

Based on the documentation, the padding property of the title in Chart.js adjusts both the top and bottom paddings. However, I'd like to adjust only the bottom padding.

I've tried using a padding object:

title:{
    display: true,
    text:'Population of cities in California',
    padding:{
        left:0,
        right:0,
        bottom:30,
        top:0
    }
}

But this is probably not supported, because it just messed everything up and made the chart not even visible. I've searched the documentation and googled a bit to see if this has been asked somewhere already, but I couldn't find any solutions.

Is there a built-in way to do this within Chart.js? If not, what would be the simplest workaround?

title.padding takes the number of pixels to add above and below the title text.

There exists a workaround to add padding at the bottom of the chart title only. The Plugin Core API offers a range of hooks that may be used for performing custom code. You can use the afterDraw hook to draw the title yourself directly on the canvas using CanvasRenderingContext2D.fillText().

plugins: [{
  afterDraw: chart => {
    var ctx = chart.chart.ctx;
    ctx.save();
    ctx.textAlign = 'center';
    ctx.font = "18px Arial";
    ctx.fillStyle = "gray";
    ctx.fillText('My Title', chart.chart.width / 2, 20);
    ctx.restore();
  }
}],

Together with this, you'll have to define top padding for your chart. This determines the space between your title and the chart (the title bottom padding basicaly).

layout: {
  padding: {
    top: 80
  }
},  

Please have a look at below code that shows how it could look like.

new Chart(document.getElementById('myChart'), {
  type: 'bar',
  plugins: [{
    afterDraw: chart => {
      var ctx = chart.chart.ctx;
      ctx.save();
      ctx.textAlign = 'center';
      ctx.font = "18px Arial";
      ctx.fillStyle = "gray";
      ctx.fillText('My Title', chart.chart.width / 2, 20);
      ctx.restore();
    }
  }],
  data: {
    labels: ['A', 'B', 'C', 'D'],
    datasets: [{
      data: [10, 12, 8, 6],
      backgroundColor: ['rgba(255, 99, 132, 0.2)', 'rgba(255, 159, 64, 0.2)', 'rgba(255, 205, 86, 0.2)', 'rgba(75, 192, 192, 0.2)'],
      borderColor: ['rgb(255, 99, 132)', 'rgb(255, 159, 64)', 'rgb(255, 205, 86)', 'rgb(75, 192, 192)'],
      borderWidth: 1
    }]
  },
  options: {
    layout: {
      padding: {
        top: 80
      }
    },   
    legend: {
      display: false
    },
    scales: {
      yAxes: [{
        ticks: {
          beginAtZero: true
        }
      }]
    }
  }
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.3/Chart.min.js"></script>
<canvas id="myChart" height="100"></canvas>