Save CanvasSnapshot on Mobile?

Hi,

Is there anyway to save the base64 canvassnapshot to phone on phonegap or cocoonjs? I've tried to open it on new window in phonegap, but user cannot save the image manually (if user hold the image there's no option came out) and in cocoonjs when i open it on new window, the game crashed.

Is there anyway to do this?

Thanks in advance