Default sorting in Angular Material - Sort header

Question

How can I change Angular Material code below, so that data-table is sorted by \'name\' column, ascending order by default. Arrow (indicating current sort direction) must be

Answer 1

In my case sorting was not working because matColumDef id and mat-cell var is different

   First Name
   {{ item.name}}

after making changes matColumnDef="firstName" to matColumnDef="name" which is same as item.name

    
   First Name
   {{ item.name}}

it works fine for me