Error: Unable to access the property of an undefined variable in Angular 4

Here is what I currently have in my code:

    <p *ngIf="model.something.satisfy"> Yes </p>
    <p *ngIf="!model.something.satisfy"> {{model.something.comments}} </p>

The issue arises in the second line with the error message "TypeError: Cannot read property 'satisfy' of undefined."

I have attempted the following solutions:

- *ngIf="!model.something?.satisfy  
- <div class="col-sm-10 offset-1" *ngIf="model.something>

Answer №1

<p *ngIf="model.something && model.something.satisfy">
   True
</p>
<p *ngIf="! (model.something && model.something.satisfy)">
  {{model.something.comments}}
</p>

This piece of code is essential for checking the existence of model.something before proceeding to access its properties like model.something.satisfy.

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