Angular LinearGauge - subvalueIndicator.text
Specifies the appearance of the text displayed in an indicator of the rangeBar type.
Note that the indent property of the text configuration object must not be set to 0 if you need to show the text.
customizeText
Specifies a callback function that returns the text to be displayed in an indicator.
The text for the indicator to display.
this keyword.format
Formats a value before it is displayed in an indicator. Accepts only numeric formats.
See the format section for information on accepted values.
When this property value is undefined, date-time axis labels include higher-level range boundaries. For example, if an axis displays months, each January label includes a year number. If an axis displays days, the first visible label in a month includes the month name.