Angular is throwing an error stating that it is unable to access the 'name' property of an undefined object

While working on my Angular application, I encountered the following error message:

" Cannot read property 'name' of undefined"

https://i.stack.imgur.com/O3vlh.png

I've been searching through my code but am unable to pinpoint the issue. The only reference to 'name' is in a select statement.

Here is the HTML snippet for the select component at Line 24:

<section *ngIf="setPlainHeader" class="p-l-xxl p-r-xxl p-b-md category bg-white-only box-shadow">
  <div class="form-group nav navbar-nav navbar-btn m-t-xs m-b-xs">
    <label class="col-sm-4 control-label  p-t-xs m-t-xs">Category:</label>
    <div class="col-sm-8 p-t-xs">
      <select
        *ngIf="Categories"
        (change)="categoryChange()"
        name="category"
        [(ngModel)]="selectedCategory"
        class="form-control">
        <option
          *ngFor="let item of Categories | async "
          [value]="item.categoryId" label="">
          {{item?.name}}
        </option>
      </select>
    </div>
  </div>
</section>

Here is the relevant TypeScript code:

selectedCategory: any = '-1';

ngOnInit() {
  this.Categories=this.commonServ.getCategoryData()
}

categoryChange() {
  this.commonServ.setSelectedCategory(this.selectedCategory); 
}

The categories are loading fine, but I keep encountering this error in the console which is affecting the rendering process.

EDIT: After further investigation, I noticed that the error occurs when the section in the header becomes hidden/visible based on setPlainHeader. Can anyone provide guidance on how to resolve this issue?

Thank you!

Answer №1

Consider implementing the safe navigation `?` operator in this manner:

{{element?.title}}

Answer №2

The issue was related to the condition *ngIf="setPlainHeader"

To resolve it, I made a modification to my code by adding a timeout in order to assign the value to setPlainHeader

this.abcService.getHeaderStatus().subscribe(
        data => {
          setTimeout(function () {

            self.setPlainHeader = data;
          }, 100);


        });   

After implementing this change, the issue was resolved successfully.

Many thanks!

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