How can I fix the error "Type '() => void' does not have property 'push'" in Typescript for Angular 10?

I encountered an issue while using push() on an array in an Angular 10 project written in Typescript.

Error

Property 'push' does not exist on type '() => void'.ts(2339)

I need assistance in understanding why this error is occurring and how to resolve it.

export class GrantProgramComponent implements OnInit {
  grantProgramForms : any = this.fb.array([]); 
  constructor(private fb: FormBuilder ) { }

  ngOnInit(): void {
    this.initializeGrantProgramForms(); 
  }


  initializeGrantProgramForms(){
    this.grantProgramForms.push(this.fb.group({
      Id : [0], 
      ProgramName : [''], 
      ProgramCode : [''], 
      StartDate : [''],
      EndDate : [''], 
      Status : [false]
    })); 
  }

}

Answer №1

To effectively utilize the formbuilder, it must be initialized within the constructor. Make sure to move your logic inside the constructor method:

 grantProgramForms : any 

constructor(private fb: FormBuilder) {
  this.grantProgramForms = this.fb.array([]); 
}

Additionally, when adding grant program forms in your addGrantProgramForms method, ensure that you are referencing the correct variable. It should be this.grantProgramForms.push instead of this.AddGrantProgramForms.push.

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