Upgradation to Angular 7: Summary and Features

AngularJS - JavaScript Framework

Google’s popular JavaScript framework, Angular, released its latest Version 7 for building mobile and desktop applications.

Angular is particularly useful for assembling data services for applications, along with the use of an HTML template to compose components and provides dependency injection. In Angular, application developers still compose components with an HTML component that connects to TypeScript code for imperative parts of the program.

What’s new in Angular 7

Angular 7 has some very interesting new tooling changes as well as some great features to improve performance. And to promote the recent trend from previous versions, upgrading is a breeze and actually faster than ever.

Angular 7 being smaller, faster and easier to use and it will be making application developers life easier. It is a major release and expanding to the entire platform including-

  • Core framework,
  • Angular Material,
  • CLI

Many of new things are added in Angular 7 which makes us curious to know these new features and bug fixes.

AngularJS Additions and Features:

The list below is just a short summary of the new features in this release but make sure you find your way down and check out, even more, this release has to offer!

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CLI Prompts

The Angular JS development team has consistently focused on improving the tools available to the Angular JS developers and the new CLI prompts are mostly similar. Usually, when you run commands as ng new or ng add, it’s a single pass.

Not with the new CLI. Now, the CLI responds with prompts. Simply try ng new myangular7app and you get a brand new prompt asking if you would like to add routing. It also assists in try a different stylesheet format. The CLI will let you select between CSS, SCSS, SASS and more or less by being customizable. With the help of CLI Prompts capability, the Angular CLI can prompt users to make decisions.

ScrollingModule

Now, many mobile frameworks have started to make the move towards dynamically loading data such as images or long lists, Angular has followed befit by adding the ScrollingModule to allow for virtual scrolling.

As elements lose or gain visibility, they are virtually loaded and unloaded from the DOM. Performance is greatly increased to the developer’s eye. Next time when you have a bunch of items for your users to scroll, stick it in a cdk-virtual-scroll-viewport component and take advantage of the performance boost!

DragDropModule

You can entirely remain within the Angular module and implement drag and drop support including reordering lists and transferring items between lists. Automatic rendering, drag handlers, drop handlers and even the ability to transfer data is included in the CDK. Angular also allows overriding standard drag animation.

DoBootstrap

Angular 7 added a new lifecycle hook that is called ngDoBootstrap and also an interface that is called DoBootstrap.

Example:

class AppModule implements DoBootstrap {
ngDoBootstrap(appRef: ApplicationRef) {
appRef.bootstrap(AppComponent);
}
}

Ivy Renderer

The Ivy rendering engine is a new backward-compatible Angular renderer which is main focused on –

  • Increased Flexibility
  • Size Reduction
  • Speed Improvements
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The template functions used for creating dynamically views are no longer nested functions inside each other.

Now we will be able to use for loops that are nested inside other loops.

The following Example –

function AppComponent(rf: RenderFlags, ctx: AppComponent) {
function ulTemplateFun(rf1: RenderFlags, ctx0: any) {
function liTemplateFun(rf1: RenderFlags, ctx1: any) {…}
}
}

No longer need to create multiple functions instances for loops that are nested inside other loops.

The following Example –

<ul *ngFor="let student of students">
<li *ngFor="let subject of student'> {{ subject }} </li>
</ul>

Angular Compatibility Compiler (ngcc)

The ngcc Angular node_module compatibility compiler is a tool which upgrades node_module compiled with non-ivy ngc into ivy compliant format.

This angular compiler will convert node_modules compiled with Angular Compatibility Compiler (ngcc), intonode_modules which have been appeared and compiled with TSC compiler transformer (ngtsc) and these compiler conversions will allow such bequest packages to be used by the Ivy rendering engine.

Drag and Drop Feature

As declared earlier, Angular 7 supports drag and drop feature which allows you to create drag-and-drop interfaces, with the support for free dragging, sorting within the list, transferring items between the lists, animations, touch devices, custom drag handles, and previews. Have a look at below GIF to get an idea about Drag and Drop feature.

Bazel

The compile_strategy() is used to decide whether to build Angular code using ngc (legacy) or ngtsc (local). In order to switch properly for g3 BUILD rules and allow testing of Ivy in g3, compile_strategy() became importable.

CDK

For the CDK (Component Dev Kit) and Angular Material, Angular 7 provides visual improvements from the Material Design 2018 refresh as well as virtual scrolling, to dynamically load and unload parts of the DOM to build high-performing and large lists of data. Also, the applications can be well versed with a drag-and-drop capability.

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UrlSegment Interface

UrlSegment interface represents a single URL segment and the constructor, properties, and methods look like below given UrlSegment class i.e.

classUrlSegment {
constructor(path: string, parameters: {…})
path: string
parameters: {…}
toString(): string
}

The UrlSegment is a part of a URL between the two slashes and it contains a path and matrix parameters which are associated with the segment.

End of the Line

Angular 7 is a complete package that is created with the purpose to deliver the fastest applications with an easier background. And it has promised true to its word! Although it seems a bit troubling to switch from one version to another like it was in previous cases, Angular 7 is still a potential competitor to other popular technologies.

It seems as AngularJS Development Services provides all the win-win benefits with its efficient features and production methods. AngularJs Developers are provided with the smooth web application development framework which allows easy and effective web application development. Thus, Google built Angular 7 provides with the beneficial features for the easiest web and mobile applications by ensuring better performance and fast results.

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