angularjsHow do AngularJS and Angular 2 compare in terms of features and performance?
AngularJS and Angular 2 are similar in many ways, but there are also some key differences.
In terms of features, AngularJS is a JavaScript-based open-source front-end web application framework, while Angular 2 is a TypeScript-based open-source web application framework. AngularJS requires the use of controllers and $scope to manage the data for views, whereas Angular 2 uses components and directives. AngularJS uses the traditional Model-View-Controller (MVC) architecture, while Angular 2 uses the Model-View-ViewModel (MVVM) architecture.
In terms of performance, AngularJS has a higher initial loading time compared to Angular 2 due to its complex DOM manipulation. Angular 2 is faster due to its improved change detection and improved rendering.
For example, the following code block shows the difference between the two frameworks in terms of performance:
// AngularJS
$scope.data = {
name: 'John',
age: 30
};
// Angular 2
@Component({
selector: 'app-root',
template: `
<div>
{{data.name}} is {{data.age}} years old
</div>
`
})
export class AppComponent {
data = {
name: 'John',
age: 30
};
}
This code block does not produce any output.
In summary, AngularJS and Angular 2 are similar in terms of features but differ in terms of performance. AngularJS has a higher initial loading time but Angular 2 is faster due to its improved change detection and improved rendering.
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