To change the topView or bottomView property I have to set the value as string. E.g. topView="month". To be typesave I like to use the CalendarViewEnum in my typescript code. When I bind the enum in the view, the enum-value is set. But unfortunately the enum value is a number and not a string. I must convert the enum value like: public getBottomView(): string { return CalendarViewEnum[this._bottomView]; } Live would be easier if string enums would be used.