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The border configuration options.

<div id="chart"></div>
<script>
$("#chart").kendoChart({
  seriesDefaults: {
    tooltip: {
      visible: true,
      border: {
        width: 2,
        color: "green"
      }
    }
  },
  series: [
    { data: [1, 2, 3] }
  ]
});
</script>

The color of the border.

Default: "black"

<div id="chart"></div>
<script>
$("#chart").kendoChart({
  seriesDefaults: {
    tooltip: {
      visible: true,
      border: {
        width: 2,
        color: "green"
      }
    }
  },
  series: [
    { data: [1, 2, 3] }
  ]
});
</script>

The width of the border in pixels. By default the border width is set to zero which means that the border will not appear.

Default: 0

<div id="chart"></div>
<script>
$("#chart").kendoChart({
  seriesDefaults: {
    tooltip: {
      visible: true,
      border: {
        width: 2
      }
    }
  },
  series: [
    { data: [1, 2, 3] }
  ]
});
</script>