MatDatepickerFilter - Filter function can't access class variable - angular-material2

Question

A MatDatePicker with a filter defined as followed:
<mat-form-field class="example-full-width">
<input matInput [matDatepickerFilter]="myFilter" [matDatepicker]="picker" placeholder="Choose a date">
<mat-datepicker-toggle matSuffix [for]="picker"></mat-datepicker-toggle>
<mat-datepicker #picker></mat-datepicker>
</mat-form-field>
export class DatepickerFilterExample {
someDateToBlock: number = 3;
myFilter = (d: Date): boolean => {
const day = d.getDay();
// THIS FUNCTION CANNOT ACCESS THE VARIABLE 'someDateToBlock'
return day !== 0 && day !== 6;
}
}
I would like to access the variable someDateToBlock (or any other) in the filter function. Is there a workaround to make this possbile?

Answer 1

I had the same issue, seems like material date picker doesn't have access to "this" of the component for filter function. For me changing:
[matDatepickerFilter]="myFilterFunction"
to
[matDatepickerFilter]="myFilterFunction.bind(this)"
did the trick.

Answer 2

This is working, here is plunkr link: https://plnkr.co/edit/oRGfxLSrn6GdfRhYO1rr?p=preview
export class DatepickerOverviewExample {
someDateToBlock: number = 3;
myFilter = (d: Date): boolean => {
const day = d.getDay();
// THIS FUNCTION CANNOT ACCESS THE VARIABLE 'someDateToBlock'
return this.someDateToBlock;
}
}
I checked with alert(this.someDateToBlock) also

Answer 3

Type '(d: Date) => boolean' is not assignable to type 'DateFilterFn<Date | null>'
myFilter = (d: Date ** |null **): boolean => {
const day = (d || new Date()).getDay();
// Prevent Saturday and Sunday from being selected.
return day !== 0 && day !== 6;
};

Answer 4

You can
myLegalDate = (d: Date): boolean => {
//Your code
//You can see the variable someDateToBlock
console.log(this.someDateToBlock);
}
myFilter = this.myLegalDate.bind(this);