Sets the checked attribute on the element, if the expression inside ngChecked is truthy.
Note that this directive should not be used together with ngModel,
as this can lead to unexpected behavior.
A special directive is necessary because we cannot use interpolation inside the checked
attribute. See the interpolation guide for more info.
<INPUT
  ng-checked="expression">
...
</INPUT>
      | Param | Type | Details | 
|---|---|---|
| ngChecked | expression | 
         If the expression is truthy,
    then the   | 
    
<label>Check me to check both: <input type="checkbox" ng-model="master"></label><br/>
<input id="checkSlave" type="checkbox" ng-checked="master" aria-label="Slave input">