What is Ng-required in AngularJS?
The ng-required Directive in AngularJS is used to specify the required attribute of an HTML element. The input field in the form is required only if the expression inside ng-required directive returns true. It is Supported by , and .
What is Ng-required?
Definition and Usage. The ng-required directive sets the required attribute of a form field (input or textarea). The form field will be required if the expression inside the ng-required attribute returns true. The ng-required directive is necessary to be able to shift the value between true and false .
How can we make input field mandatory in AngularJS?
AngularJS ng-required Directive
- Syntax:
- expression: It specifies an expression that will set the required attribute if it returns true. Let’s take an example to demonstrate the usage of ng-required directive.
- See this example:
Why Ng is used in AngularJS?
Why is the namespace called “ng”? Because HTML has Angular brackets and “ng” sounds like “Angular”. ng is an abbreviation of Angular. NG stands for “Next Generation”.
How ng-init works in AngularJS?
The ng-init directive is used to initialize an AngularJS Application data. It defines the initial value for an AngularJS application and assigns values to the variables. The ng-init directive defines initial values and variables for an AngularJS application. Example: In this example, we initialize an array of string.
What is the use of NG in Angular?
The ng-app directive defines the root element of an AngularJS application. The ng-app directive will auto-bootstrap (automatically initialize) the application when a web page is loaded.
What is ng-template in Angular?
ng-template is an Angular element that is used for rendering HTML in a template. However, it is not rendered directly on DOM. If you include an ng-template tag to a template, the tag and the content inside it will be replaced by comment upon render.
What is Ng container in Angular?
What is ng-container? ng-container allows us to create a division or section in a template without introducing a new HTML element. The ng-container does not render in the DOM, but content inside it is rendered. ng-container is not a directive, component, class, or interface, but just a syntax element.
What is the use of ng required in HTML?
Definition and Usage The ng-required directive sets the required attribute of a form field (input or textarea). The form field will be required if the expression inside the ng-required attribute returns true. The ng-required directive is necessary to be able to shift the value between true and false.
What is ng-required in AngularJS?
AngularJS ng-required Directive The AngularJS ng-required directive is used to add the required validator to ng-model. It is mainly used for input and select control but it can also be used for custom controls. The ng-required directive is necessary to makes you able to shift the value between true and false.
What is the use of required attribute in angular?
It is most often used for input and select controls, but can also be applied to custom controls. The directive sets the required attribute on the element if the AngularJS expression inside ngRequired evaluates to true. A special directive for setting required is necessary because we cannot use interpolation inside required.
What is the use of NG prefix in AngularJS?
In AngularJS framework, it is very important to know that all the In-Built directive which have been provisioned by AngularJS framework will always be denoted with ng prefix. The expression defined in ng-if directive evaluates to a Boolean value i.e. True or False and based on this value the element is displayed on HTML DOM.