How can a checkbox be implemented in Angular without using ngModel? What alternative should be used instead

I am currently looking to enhance a checkbox that used to handle backend calls, but now only needs to function as a simple checkbox that turns off other checkboxes when selected:

    <label class="custom-control custom-checkbox" style="display: block">
      <input type="checkbox" class="custom-control-input" id="myCheckbox" name="myCheckbox"
             [(ngModel)]="checkboxPolicy" (ngModelChange)="parentcheckbox($event,child1,child2,child3)">
      <span class="custom-control-indicator"></span>
      <span class="custom-control-description">
        <span id="checkboxstart">
        </span>
      </span>
    </label>

I want to eliminate the ngModel entirely, but the input field still requires it. Is there a way to create a data-less checkbox solely for UI purposes? It should not store any data, just trigger the ngModelChange method for controlling other checkboxes.

angulartypescriptcheckboxangular-ngmodel

Answer №1

To optimize your code, you can remove [(ngModel)] and replace (ngModelChange) with (change). You can achieve the same functionality using $event in your parentcheckBox function. The following code snippet demonstrates how to implement this:

<label class="custom-control custom-checkbox" style="display: block">
      <input type="checkbox" class="custom-control-input" id="myCheckbox" name="myCheckbox"
              (change)="parentcheckbox($event,child1,child2,child3)">
      <span class="custom-control-indicator"></span>
      <span class="custom-control-description">
        <span id="checkboxstart">
        </span>
      </span>
    </label>

  parentcheckbox(val, x, y, z) {
    const isChecked = val.currentTarget.checked;
    if (isChecked) {
      // disable the checkboxes
    } else {
      // enable the checkboxes
    }
  }

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