score:1

I'm not sure about the offset working as you expect. Note that even on the first graph, the yaxis is not doing that padding.

I'd look into suggestedMin and suggestedMax as shown below:

var options, ctx;

options = {
  type: 'line',
  data: {
    labels: [0, 1, 2],
    datasets: [{
      data: [0, 1, 0]
    }]
  },
  options: {
    scales: {
      xAxes: [{
        offset: true
      }],
      yAxes: [{
        offset: true
      }]
    }
  }
}

ctx = document.getElementById('chart1').getContext('2d');
new Chart(ctx, options);

options = {
  type: 'scatter',
  data: {
    datasets: [{
      data: [{
        x: 0,
        y: 0
      }, {
        x: 1,
        y: 1
      }, {
        x: 2,
        y: 0
      }]
    }]
  },
  options: {
    scales: {
      xAxes: [{
        display: true,
        ticks: {
            suggestedMin: -1,    // minimum will be -1, unless there is a lower value.
            suggestedMax: 3
        }
    }],
      yAxes: [{
        display: true,
        ticks: {
            suggestedMin: -1,    // minimum will be -1, unless there is a lower value.
            suggestedMax: 2
        }
    }]
    }
  }
}

ctx = document.getElementById('chart2').getContext('2d');
new Chart(ctx, options);
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.8.0/Chart.js"></script>

<body>
  <canvas id="chart1" height="100"></canvas>
</body>

<body>
  <canvas id="chart2" height="100"></canvas>
</body>


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