Ｍ***：
u should invoke `wx.createMapContext()` to get a MapContext object, then use `if`.


suck as:
var context = wx.createMapContext(mapId);
if (context.getRegion) {
// supported
} else {
// not supported
}
W***：
Thank you. It's also good alternative way, I took note of it.


I just found out that it works if I use
wx.canIUse('mapContext.getRegion')



Problem solved now.
W***：系统记录