JS API Reference

Welcome to the Highcharts Gantt JS (gantt) Options Reference

These pages outline the chart configuration options, and the methods and properties of Highcharts objects.

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A callback function to place the tooltip in a default position. The callback receives three parameters: labelWidth, labelHeight and point, where point contains values for plotX and plotY telling where the reference point is in the plot area. Add chart.plotLeft and chart.plotTop to get the full coordinates.

Since v7, when tooltip.split option is enabled, positioner is called for each of the boxes separately, including xAxis header. xAxis header is not a point, instead point argument contains info: { plotX: Number, plotY: Number, isHeader: Boolean }

The return should be an object containing x and y values, for example { x: 100, y: 100 }.