How to use PatchValue inside a loop on a FormArray?

Question

Hello everyone, I have a function where i pass the id when i use console.log(id) it's working fine but why i can't use patchValue inside a loop in a formArray? i want all the first 5 elements to have the same id.

for(let j=0; j<5; j++)
{
  this.myarray.at(j).patchValue([
    {
       elementid: id
       
     }
   ]);
  
}

Answer 1

I'm not sure that this is exactly what you were trying to do, but I did a small StackBlitz where I replace the values within a loop using splice . As you can see in the console, the first 5 elements of the array all have the same id after running the function, while the 'name' is unchanged.

There are probably better ways of achieving the same result though

Answer 2

this.myarray.controls[j].get('elementid').setValue(id);