Error TS2345 when using moment js how to fix?

Question

JavaScript

there is such pipe

import { Pipe, PipeTransform } from '@angular/core'
import * as moment from 'moment'


@Pipe({
    name: 'moment'
})

export class MomentPipe implements PipeTransform {
    transform(momentObj: moment.Moment, format: string ="MMMM YYYY"): string {
        return momentObj.format(format)
    }

}

and html component

<p>

    <i class="material-icons" (click)="month(-1)">arrow_left</i>

    <span>
        {{date.date | async | moment}}
    </span>

    <i class="material-icons" (click)="month(1)">arrow_right</i>

</p>

when writing moment in span tag it gives error TS2345: Argument of type 'Moment | null' is not assignable to parameter of type 'Moment'.
Type 'null' is not assignable to type 'Moment'.
How to fix?

Answer 1

Adding null through the Union type helped me

export class MomentPipe implements PipeTransform {
    transform(m: moment.Moment | null , format: string = 'MMMM YYYY'): string {
        return m!.format(format)
    }
}