How are the viewport attributes formatted when the axis numbers are a time?

[ayy]

I have a graph with the X axis values being a javascript Date object. These are formatted for each data point as “HH:mm:ss.fff” and on the axis it is displayed as “HH:mm”. I would like to zoom in and then use the new values of chart.axisX[0].get(“viewportMinimum”) and chart.axisX[0].get(“viewportMaximum”) for another feature in my app. These values are not the date objects and show values that look like this: “1483281267314.5”. I was wondering how date objects are formatted to get numbers like this so that I may format these numbers in reverse to get the time again.

[Indranil]

@ayy,

You can use rangeChanging or rangeChanged event to get viewportMinimum and viewportMaximum after zooming / panning.
And you can use formatDate() to modify the date as per your requirement.

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Indranil Deo
Team CanvasJS

[ayy]

Thank you!