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Angular ngShow and ngHide


The ng-show directive shows or hides the HTML element based on if the expression passed to it is true or false. If the value of the expression is falsy then it will hide. If it is truthy then it will show.

The ng-hide directive is similar. However, if the value is falsy it will show the HTML element. When the expression is truthy it will hide it.

Working JSBin Example
Controller:

var app = angular.module('app', []);
angular.module('app')
 .controller('ExampleController', ExampleController);
function ExampleController() {
 var vm = this;
 //Binding the username to HTML element
 vm.username = '';
 //A taken username
 vm.taken_username = 'StackOverflow';
}


View

<section ng-controller="ExampleController as main">
 
 <p>Enter Password</p>
 <input ng-model="main.username" type="text">
 
 <hr>
 
 <!-- Will always show as long as StackOverflow is not typed in -->
 <!-- The expression is always true when it is not StackOverflow -->
 <div style="color:green;" ng-show="main.username != main.taken_username">
 Your username is free to use!
 </div>
 
 <!-- Will only show when StackOverflow is typed in -->
 <!-- The expression value becomes falsy -->
 <div style="color:red;" ng-hide="main.username != main.taken_username">
 Your username is taken!
 </div>
 
 <p>Enter 'StackOverflow' in username field to show ngHide directive.</p>
 
</section>



Conclusion

In this page (written and validated by ) you learned about AngularJS ngShow and ngHide . What's Next? If you are interested in completing AngularJS tutorial, your next topic will be learning about: AngularJS ngRequired.



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