Convert spatialreference 102100 to 3059

[RaimondsVerpejs]

I am using JS Extent Helper to get extent of city

example:

Graphic extent json: {"xmin":2674149.43455618,"ymin":7740862.918153928,"xmax":2696354.3912729938,"ymax":7759819.301168625,"spatialReference":{"wkid":102100}}

how to convert data to wkid: 3059 ?

[TimWitt2 · Accepted solution]

You can use the project tool: GeometryService | API Reference | ArcGIS API for JavaScript