Executing a method in an Angular 2 component through its template

I've been diving deep into Angular2 lately, but I've hit a snag. Here's the template code where I'm stuck:

<div class="container" *ngFor="let group of groupList">
                <div class="row">
                    <div class="col-xs-12">
                        <some-child-component [store]="group[0]" [class.hide]="evalStore(group[0])"></some-child-component>
                    </div>
           </div>
    </div>

I'm trying to call the evalStore(group[0]) method from my template. The method is in the component class as shown below:

evalStore(item:any) {
    console.log('inside evalStore');
     if(item === undefined){
       return false;
     } else {
       return  item.type !== 'store';
     }
  }

Unfortunately, I'm facing an issue where this method is not being called. There are no relevant errors showing up in the console.

Any help would be greatly appreciated...

Answer №1

It seems there is a misunderstanding in how you are using the value binding. Using [class.hide] as an attribute is not valid. Remember, square brackets are meant to bind attributes to values or expressions within Angular.

<div [store]="group[0]">

What you are attempting here is a class binding, for which you need to use [ngClass]. This requires an expression containing key/value pairs where each key represents the class name and each value returns either true or false, allowing for multiple classes to be applied dynamically.

<div [ngClass]="{hide: evalStore(group[0])}">

If your class name contains special characters like dashes (-), remember to enclose the key in quotes.

<div [ngClass]="{'hide-me': evalStore(group[0])}">

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