5 Features To Watch Out For in Angular v4

“5 Features To Watch Out For in #Angular v4” by @scotch_io #javascript #AngularJS

  • They include but not all:

    Angular v4 is in RC; this means you can start using it in your project hoping that no breaking changes will be released at final.

  • With Angular v4 (RC), you can use the syntax to handle such case:

    Let’s have a look at a possibly realistic example:

    We are simulating an HTTP async request with Observable that returns a user payload if successful.

  • Now, TypeScript allows you to explicitly say a variable can have any of those types:

    The above example simple says:

    This feature is now compliant in Angular (v4), so you could do stuff like this:

    Server-side rendering is the act of spitting the same HTML content in virtual DOM to the server so that they are rendered appropriately by the browser on request.

  • The project was maintained entirely outside Angular, but from Angular v4 forward, Universal will become a core Angular module.
  • Angular v4 ships flattened versions of modules in the ECMAScript Module format.

By now, most probably, we have come in peace with the fact that Angular will be rolling out features using semantic versioning. This means…
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Single Page Apps with AngularJS Routing and Templating – Hell’s Kitchen

Single Page Apps with #AngularJS Routing and Templating

  • Let’s add the module and controller to our HTML so that Angular knows how to bootstrap our application.
  • Since we have our module and controller set up and we know that Angular is working properly, we will start working on using this layout to show the different pages.
  • is an Angular directive that will include the template of the current route (/home, /about, or /contact) in the main layout file.
  • Since we are making a single page application and we don’t want any page refreshes, we’ll use Angular’s routing capabilities.
  • This way, each part of our application will use its own view and Angular controller.

Single page apps are becoming increasingly popular. Sites that mimic the single page app behavior are able to provide the feel of a phone/tablet application. Angular helps to create applications like this easily.
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What’s New In Angular 4.0

  • In Angular 4.0, some under the hood changes, some improvements, and performance improvements have been done.
  • In Angular 4.0, some under the hood changes, some improvements, and performance improvements have been done.
  • ngIf, 

    In Angular 2.0, if we wanted to use ngIf with multiple conditions or specifically with else, we write, as shown below.

  • In Angular 2.0

    Output

    In Angular 4.0 

    NgIf syntax has been extended to support the else clause to display the template when the condition is false.

  • Example OutputIn Angular 4.0NgIf syntax has been extended to support the else clause to display the template when the condition is false.

In this article, I am explaining what is new in Angular 4.0.
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Free Learning

Construct a MEAN application with the combo of MongoDB, Express, AngularJS, and Node.js

A new free programming tutorial book every day! Develop new tech skills and knowledge with Packt Publishing’s daily free learning giveaway.
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AngularJS, Angular and Angular v4

Recommended post 💥 “#AngularJS, #Angular and Angular v4 by @Foxandxss #javaScript
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  • The old and new Angular products need names that are fixed and independent of the version number.
  • With semantic versioning, you can tell if a new release is an easy install, with no breaking changes, simply by looking at the version number.
  • The downside is that breaking changes are inevitable and, therefore, new releases of Angular are bound to have version numbers like , , , etc.
  • Semantic Versioning (SemVer) is a convention that dictates how the version number changes for each new release of a library.
  • A breaking change means that upgrading to the new version of the library might cause your application to behave in an unexpected way that contradicts previously documented behavior or fail outright.

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