What is difference between controller and directive AngularJS?

A controller is usually used to contain and maintain the logic for your view, which gets bound to your view via $scope. A directive is something that you might use repeatedly and is called in your view directly through the directive name which you can pass in as an attribute.

What is the use of angular controller?

The controller in AngularJS is a JavaScript function that maintains the application data and behavior using $scope object. You can attach properties and methods to the $scope object inside a controller function, which in turn will add/update the data and attach behaviours to HTML elements.

What is the difference between controller and link in directives?

Answer:The link option is just a shortcut to setting up a post-link function. controller: The directive controller can be passed to another directive linking/compiling phase. It can be injected into other directices as a mean to use in inter-directive communication.

What is difference between controller and component in angular?

From Controllers to Components The Angular 1. This means that in Angular 2 there are no controllers and no directives. Instead, a component has a selector which corresponds to the html tag that the component will represent and a template to specify an HTML template for the component to populate.

What is a directive in AngularJS?

Directives are markers on DOM element which tell Angular JS to attach a specified behavior to that DOM element or even transform the DOM element with its children. Simple AngularJS allows extending HTML with new attributes called Directives.

What are directives in Angular?

Directives are classes that add additional behavior to elements in your Angular applications. Use Angular’s built-in directives to manage forms, lists, styles, and what users see. Attribute directives—directives that change the appearance or behavior of an element, component, or another directive.

What is the use of directive?

At the core, a directive is a function that executes whenever the Angular compiler finds it in the DOM. Angular directives are used to extend the power of the HTML by giving it new syntax. Each directive has a name — either one from the Angular predefined like ng-repeat , or a custom one which can be called anything.

What are Angular directives?

What is the difference between a link and compile in Angular?

Link function: It is used for registering DOM listeners as well as instance DOM manipulation. It is executed once the template has been cloned. Compile: traverse the DOM and collect all of the directives. Link: combine the directives with a scope and produce a live view.

What is the difference between directive and component in AngularJS?

Component is used to break up the application into smaller components. But Directive is used to design re-usable components, which is more behavior-oriented. Whereas Directive doesn’t have views. So you can’t use viewEncapsulation in directive.

What is the difference between angular component and angular directive?

One of the major differences between Angular Component and Angular Directive is that every Angular Component must and must have a view/template associated with it, without a view, Angular Component cannot be created whereas Directive does not have to particularly have view associated with it.

What is the use of controller in angular?

In AngularJS, a controller is a JavaScript constructor function that is used to augment the AngularJS scope. When a controller is attached to the DOM via the ng-controller directive, AngularJS will instantiate a new controller object, using the specified controller’s constructor function.

What is the difference between ng-include and Ng-directives?

Under Angular, these all do more than normal! Directives allow you to “componentize HTML”. Directives are often better than ng-include. E.g., when you start writing lots of HTML with mainly data-binding, refactor that HTML into (reusable) directives.

How to register a component in angular?

Whenever we want to register the Angular component we need to use meta-data annotation @Component. Angular Components are a subset of Angular Directive and they are always associated with a template/View. Unlike other directives, only one component can be instantiated for a given element in a template.