the current condition of the md-checkbox within angular 2

One of the challenges I am facing involves dealing with the md-checkbox element :

<md-checkbox (change)="showPaidOrders($event)">
    <span class="show-orders-label">{{'paid' | translate}}</span>
</md-checkbox>

Here is its implementation in TS :

showPaidOrders(event) {
    if (event.target.checked) {
      return true;
    }   
}

I encountered an issue that resulted in the following error:

cannot read property 'checked' of undefined

Interestingly, this works perfectly fine with a standard input element when using the checkbox type. Is there perhaps an alternative method to consistently check the status of the md-checkbox (on every click)?

Answer №1

Visit the link for more information: https://github.com/angular/material/issues/535

It seems that md-checkbox currently doesn't support the checked attribute. If you believe this feature is necessary, you have the option to submit a pull request that updates the directive scope to accept ng-checked/checked as an attribute and pass that value when present onto the input within the directive template.

However, there is a workaround available:

<md-checkbox ng-model="truthy" ng-checked="true" label="md-checkbox">{{truthy}}</md-checkbox>

For a live example, check out this link: http://plnkr.co/edit/RKwM5mRYLh5k6MoAyLnS?p=preview

Answer №2

Consider using the event.checked syntax over event.target.checked. When working with <md-checkbox>, it has its own change behavior, separate from a standard <checkbox>. Check out the documentation on MdCheckboxChange for more information.

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