TypeScript sort by date not working

Try using the Date.getTime() method:

public sortByDueDate(): void {
    this.myArray.sort((a: TaskItemVO, b: TaskItemVO) => {
        return a.dueDate.getTime() - b.dueDate.getTime();

    });
}

^ Above throws error with undefined date so try below:

Edit

If you want to handle undefined:

private getTime(date?: Date) {
    return date != null ? date.getTime() : 0;
}


public sortByDueDate(): void {
    this.myArray.sort((a: TaskItemVO, b: TaskItemVO) => {
        return this.getTime(a.dueDate) - this.getTime(b.dueDate);
    });
}