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Ronan Pozzi
2,560 PointsWhat's the différence between the ngForm(from #commentForm) and NgForm from class import ?
In the entry-comment-form.component.html we put #commentForm: ngForm but in the component.ts we use NgForm, what is this "ngForm" (without uppercase) ?
1 Answer
Dane Parchment
Treehouse Moderator 11,077 PointsThe difference is one is the class that you are importing (NgForm). This basically gives you access to the NgForm directive. Now NgForm itself is a directive, so even though we have imported it, we still need a way to gain access to the methods, variables, etc, that it provides. This is where the ngForm comes in. This basically provides your form with access to the method and variables found within the NgForm directive.
Directly from the Angular Documentation:
You optionally export the directive into a local template variable using ngForm as the key (ex: #myForm="ngForm"). This is optional, but useful. Many properties from the underlying FormGroup instance are duplicated on the directive itself, so a reference to it gives you access to the aggregate value and validity status of the form, as well as user interaction properties like dirty and touched.