descriptionFormatter property

Formatter function to use instead of the default for point descriptions.

Receives one argument, point, referring to the point to describe. Should return a string with the description of the point for a screen reader user. If false is returned, the default formatter will be used for that point.

Note: Prefer using accessibility.point.valueDescriptionFormat instead if possible, as default functionality such as describing annotations will be preserved.

API Docs: https://api.highcharts.com/highcharts/accessibility.point.descriptionFormatter