Top Features Introduced in Angular 4

AngularJS development Services are supplying with spontaneous, interactive and clean applications with the help of extra ordinary and magical features of AngularJS. The angular community has included many advanced changes to angular 4 and that’s why the major version number has moved to Angular 4. The main reason behind skipping the version 3 was that the router package was in version 3.x, so instead of putting everything to 3.0 and the router to 4.0, the team chose to upgrade the versions of all the ng — modules to 4.0. Let me tell you a important news that the angular community has decided for some time-based releases occurring in three different phases:

· Angular patches will be released every week

· Few minor releases will be followed by major release

· At last, there will be a major release every 6 months.

Angular 4

Now let’s jump into the major changes that have been introduced in Angular 4:

Type Script 2.4:

Type Script is an open source programming language created and maintained by Microsoft which is free to implement. Type Script is a super set of JavaScript which primarily provides optional static typing, classes and interfaces. Type Script is designed for development of large applications and trans compilers to JavaScript. Angular 4 introduced them and soon you will be able to activate the new strictNullChecks.

Module-ID Removed:

They added a new SystemJS plugin which manually writes module id in angular 4.0, angular can take the path reference you should provide relative path is enough. It dynamically converts “component-relative” paths in template URL and style URLs to “absolute paths” for you.

Smaller & Faster Apps:

The AngularJS development team did a great job enhancing the speed. Angular 4 applications are smaller & faster in comparison with Angular 2.It has been noticeable when doing development, but I have not been able to test much of the difference on a live server.

Animation Package:

Upgrading the Angular 2 Animations now has their own package i.e. @angular/platform-browser/animations; now import statement will look like this instead:

And you’ll also need to import the BrowserAnimationsModule module in your app module:

Animations now have their own package i.e. @angular/platform-browser/animations.

Template ng-template:

You need to take care of that. You need to modify your code and change all occurrences of




you should use the ng-template tag instead of as <template> caused conflicts with other usages of the <template> tag It still works, therefore the Angular team changed it to use <ng-template> for Angular purposes. It will pop warning if you use the deprecated template somewhere when you update to Angular 4, so it will be easy to spot them. It’s a breaking change; therefore they didn’t introduce this change in Angular-2 but only in Angular-4 according to semantic versioning rules.

ngIf with else:

It’s now also possible to use an else syntax in your template.


Angular 4 introduced a new title case pipe. It changes the first letter of each word into uppercase.


Adding search parameters to an HTTP request has been simplified.

I guess I have covered all the major changes that have been introduced in Angular 4. The application development using AngularJS 4.0 provides with more secure, flexible and scalable pathway. Please share your thoughts in the comment section.

See Also: Which is best JavaScript Development Framework AngularJS VS EmberJS VS BackboneJS