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HTML 

              
                <svg class="chart"></svg>
<table class="legend"></table>
!

CSS 

              
                .chart{
  width: 100%;
  min-height: 400px;
}

.c3-bars-Low .c3-bar{
  stroke: rgb(255,255,255) !important;
  fill: rgba(255,255,255, 0) !important;
}

.c3-grid{
  padding-right: 40px;
}
!

JS 

              
                
var chart = c3.generate({
  bindto: '.chart',
    data: {
        x: 'dates',
        columns: [
  [
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    188,
    188,
    188,
    188,
    188,
    188,
    189,
    191,
    191,
    192,
    193,
    197,
    199,
    201,
    204,
    204,
    204,
    204,
    204,
    208,
    210,
    211,
    211,
    213,
    213,
    213,
    216,
    218,
    221,
    225,
    226,
    227,
    228,
    231,
    232,
    232,
    232,
    233,
    235,
    235,
    237,
    237,
    238,
    238,
    238,
    242,
    243,
    243,
    246,
    252,
    253,
    255,
    256,
    257,
    258,
    262,
    262,
    265,
    266,
    267,
    267,
    267,
    270,
    273,
    274,
    274,
    274,
    277,
    277,
    281,
    287,
    289,
    292,
    292,
    296,
    296,
    298,
    298,
    298,
    298,
    300,
    302,
    305,
    305,
    305,
    306,
    307,
    307,
    308,
    308,
    308,
    308,
    308,
    308,
    308,
    310,
    310,
    310,
    311,
    317,
    319,
    319,
    321,
    321,
    321,
    321,
    321,
    322,
    323,
    324,
    326,
    328,
    328,
    330,
    332,
    332,
    332,
    334,
    336,
    340,
    343,
    347,
    347,
    347
  ]
],
        types: {
            opened: 'area-spline',
            closed: 'area-spline'
            // 'line', 'spline', 'step', 'area', 'area-step' are also available to stack
        },
        groups: [['opened', 'closed']]
    },
    grid: {
        x: {
            lines: [
                {value: "2018-06-12", text: '100 open issues'},
                {value: "2019-01-30", text: '200 open issues'},
                {value: "2019-04-07", text: '300 open issues'},
            ],
        }
    },
      axis: {
        x: {
          type: 'timeseries',
          tick: {
            format: '%Y-%m-%d',
          },
        },
      },
});
!
999px
Why did the programmer quit her job? She didn't get arrays.

Console