polymer - Vaadin-Datepicker Min/Max limit not working -

i got 2 vaadin-datepickers in polymer project. 1 start-date , 1 end-date. want make sure end-date after start-date. read api-documentation can use min max properties.

<vaadin-date-picker label="start date" value="{{item.startdate}}"></vaadin-date-picker> <vaadin-date-picker label="end date" min="{{item.startdate}}" value="{{item.enddate}}"></vaadin-date-picker> 

with above example nothing seems happen?

i did test check if vars defined , if maybe format incorrect

<vaadin-date-picker label="end date" min="2000-01-01" max="2000-12-31" value="{{item.enddate}}"></vaadin-date-picker> 

i checked version i'm using that's up-to-date 1.1.4

does know i'm doing wrong?

min/max limits not supported in 1.1.4 release.

from github documentation :

https://github.com/vaadin/vaadin-date-picker/releases/tag/v1.2.0-alpha1