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<div ng-app=""> 
    <p ng-class="{true: 'strike', false: 'bold'} [deleted]">Map Syntax Example</p>
    <label>
       <input type="checkbox" ng-model="deleted">
       deleted 
    </label>  
</div>    

.strike {
    text-decoration: line-through;
}
.bold {
    font-weight: bold;
}