These pages outline the chart configuration options, and the methods and properties of Highcharts objects.
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Order of tab navigation in the chart. Determines which elements
are tabbed to first. Available elements are: series, zoom,
rangeSelector, navigator, chartMenu, legend and container.
In addition, any custom components can be added here. Adding
container first in order will make the keyboard focus stop on
the chart container first, requiring the user to tab again to
enter the chart.