datepicker cannot work

[geogeek11]

i've tried to test it to pick a date but using ionic 3 for android using this code :

this.datePicker.show({
date: new Date(),
mode: 'date'
});

but it gives always the same error :

ERROR TypeError: Object(...) is not a function
at DatePicker.show (vendor.js:125405)

[ammaratef45]

I get the same just by adding DatePicker to providers without writing any code.