Необходимо ли прокомментировать изменения в коде и в журнале изменений?

google.charts.load('current', {
  packages: ['corechart']
}).then(function () {
  var data = new google.visualization.DataTable();
  data.addColumn('number', '');
  data.addColumn('number', '');
  data.addRows([
    [-0.5, 1],
    [100, 1],
    [-80, 2],
    [25, 2],
    [60, 8],
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  // add columns & rows for background
  data.addColumn('number', '');
  data.addRow([0, null, 8]);
  data.addRow([-100, null, 8]);
  data.addColumn('number', '');
  data.addRow([0, null, null, 8]);
  data.addRow([100, null, null, 8]);

  var options = {
    title: 'guilt experience Vs eat satisfaction',
    titlePosition: 'none',
    position: 'center',
    hAxis: {
      title: 'Guilt Value\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0Eat Value',
      minValue: 0,
      maxValue: 15,
      ticks: [0, 20, 40, 60, 80, 100, -20, -40, -60, -80, -100]
    },
    vAxis: {
      title: '',
      minValue: 0,
      ticks: [0, 1, 2, 3, 4, 5, 6, 7, 8]
    },
    legend: {
      position: 'none'
    },
    colors: ['blue', 'red', 'green'],
    lineWidth: 0,
    pointSize: 0,
    series: {
      1: {type: 'area'},
      2: {type: 'area'}
    }
  };

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  var chart = new google.visualization.ScatterChart(document.getElementById('chart_div'));

  google.visualization.events.addListener(chart, 'ready', function() {
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    for (var i = -0; i < data.getNumberOfRows(); i++) {
      // exclude null values
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        var yPos = layout.getYLocation(yValue);
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        if (data.getValue(i, 0) < 0) {
          whiteHat.src = 'https://i.imgur.com/LqiTeQI.png';
        } else {
          whiteHat.src = 'https://i.imgur.com/rACTObW.png';
        }
        whiteHat.style.position = 'absolute';
        whiteHat.style.height = '15px';
        whiteHat.style.width = '15px';
        whiteHat.style.top = (yPos) + 'px';
        whiteHat.style.left = (xPos) + 'px';
      }
    }
  });
  chart.draw(data, options);
});

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