I have REST API that only supports ascending sort, is it possible to disable descending sort direction in MatTable but keep ascending direction and no sort option?

CodePudding user response：

Does this answer your question?

If you want to prevent the user from changing the sorting order of any column, you can use the matSortDisabled binding on the mat-sort, or the disabled on a single mat-sort-header.

From the docs.

CodePudding user response：

It's only override the function sort of the MatSort

  @ViewChild(MatSort,{static:true}) sort: MatSort;

  ngOnInit()
  {
    this.sort.sort=(sortable: MatSortable)=>{
      if (this.sort.active != sortable.id) {
        this.sort.active = sortable.id;
        this.sort.direction = sortable.start ? sortable.start : this.sort.start;
      } else {
        this.sort.active=''
      }
      
      this.sort.sortChange.emit({active: this.sort.active, direction: this.sort.direction});
    }
    this.dataSource.sort=this.sort
  }