#Angular9 development

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Learn about all the new features of Angular 9

Google-driven Java Script has added to its glory yet another framework that is set to embolden the developer’s efforts to create applications. The Angular 9 Beta version was stated to release between the October and November 2019 time frame, but the beta stage has been released and has given a unique tool to improvise further before the actual Angular 9 hits the market. 

Do you know what the best part about this successor is? Yes, you guessed it right! Here, Ivy generation compilation and rendering pipeline have become the default feature. Earlier it had to be enforced by the developers but now with Ivy Compiler becoming a default factor, it is all set to make things easier for developers. 

Angular and Angular-based applications have become one of the most popular frameworks of Google which has given an all-new meaning to the web, mobile, and desktop applications. It has more than 55,000 stars on Github and has always been under the supervision and scrutiny of Google’s team of community members. The RC version or the release candidate version has all the qualities of making it big. 

Let us discover its prime offerings. 

Angular Ivy

Many users access web pages from their mobiles even when there is poor connectivity. This could be due to the size of downloadable assets. Developers provide incessant efforts to reduce the size of downloadable assets but it can prove to be an expensive affair. Now with smaller sizes of JavaScript bundles, Ivy is a welcome permanent addition to the family of Angular 9. 

Angular based applications built with Ivy will be agile and adept considering Ivy compiler was discretionary in the previous versions. he new Ivy compiler will finally be the default, so Angular apps built with Ivy will be faster and more efficient.tsconfig.json file in the project folder as seen earlier.

Once it had been added, Angular developers had to run the compiler by performing the NGC command in the project folder as given below.

node_modules/.bin/ngc

But now in the new version implementing the enable ivy option in the tsconfig.json file, is not required as Ivy renderer has become the default. 

Safer than the previous versions

In the previous versions of Angular development, for testing of API’s a function called TestBed.get() had to be provided. After version 8 the intake of string values also ceases. This led to the Angular developer community extricate the safety issue. In this new version now, the team came up with TestBed.inject() and remonstrate the get function. 

TestBed.get(ChangeDetectorRef) // any

TestBed.inject(ChangeDetectorRef) // ChangeDetectorRef

With the improvements in TestBed API, the inject function will do what the get does along with being type-safe concurrently. 

Module with Providers

Again another enriching feature is the Module with providers that makes immense sense and value to library owners. In the previous versions if you have used ModuleWithProviders then Angular developers would type it stringently or will not type at all. But with the new version Angular developers have to constantly adopt the across-the-board ModuleWithProviders<T> type to display the module type. Initially, the declaration would look like the below-given illustration:

@NgModule({ ...}) export class MyModule { static forRoot(config: SomeConfig): ModuleWithProviders {  

   return {  

         ngModule: SomeModule,  

         providers: [{ provide: SomeConfig, useValue: config }]  

   };  

 }  

}

After the changes, the declaration would look like:

@NgModule({ ...})  

export class MyModule {  

  static forRoot(config: SomeConfig): ModuleWithProviders<**SomeModule**>  

{  

   return {  

         ngModule: SomeModule,  

         providers: [{ provide: SomeConfig, use value: config }]  

   };  

 }  

}

In the new version, the codebase will be migrated axiomatically after you give the command

Ng update

Advancement in Angular Forms

For prime Angular based applications, the 9th version of Angular has arrived with few form changes. The <ngForm></ngForm> is not a functional selector now for referencing an Angular form. Now with the new version <ng-form></ng-form> is used. The warning that was given for using removed form tags has been removed in the new version. In this version, you can also utilize FormsModule rather than FormsModule.withConfig. 

Selector-less Decrees

You will not find this in the Angular 8 Ivy display. The capability to use selector-less directives as base-class is the new feature of Angular 9. It has been added so as to ensure that Angular developers can benefit from Angular compilation. 

Internalization

Angular CLI can be utilized to accomplish the standard code which is important to create files for translators. This is done to ensure that publishing in the Angular based application happens in varied languages. 

For instance, take into consideration an application with the mentioned HTML title in the English language.

<h1>Hello Good morning!</h1>

You can add the i18n attribute to mark “Hello Good morning!” as a translatable text. I18b is the short form of internalization here. The addition would appear like:

<h1 i18n>Hello Good morning!</h1>

Once the angular developers have configured Angular based applications you can run the xi18n command to derive localizable text into a file. 

You can see a smidgen of generated messages. xlffile below:

<trans-unit id="a05c3a315a6ee3e6ad4733a1f72e8d16775810ca" datatype="Html">  

    <source>Hello Good Morning!</source>  

    <target/>  

</trans-unit>

You can then copy the messages.xlf files to the messages.es.xlf file as given below and reframe it to construct the app for Spanish accepting locations along with the translated composition.

<trans-unit id="a05c3a315a6ee3e6ad4733a1f72e8d16775810ca" datatype="Html">  

    <source>Hello Good morning!</source>  

    <target>¿Hola Buenos Dias?</target>  

</trans-unit>

Dependency Injection changes

Angular Core has some aggressive upgradations that will allure a major chunk of Angular developers. In order to see how Angular 9 adds dependency interjection support for PorvidedIn value, we need to this illustration below: 

@Injectable({  

  providedIn: 'platform'  

})  

class MyService {...}

Language service improvements

Thanks to the new version, service support for infused ecosystems like the VS Code and WebStorm has gone a complete rejuvenation. The definition of links with the new version will become more stable. The interpretation of style-based URLs will now be checked-off as template URLs. URLs that do not refer to the actual project file will also be distinguished.

TypeScriptHost enhancements also will be able to make out severity logging by debugging various mistakes and methods. For better testing of scripts a convenience script also has been added to the Angular V9. 

Updates of the Angular components

For the CDK, there is an update about Hammer.js, which aids in supplementing gesture support and was essential to use CDK. In the new version, it is optional. If you want to import it you can do so with the given command:

import `HammerModule` from [@angular/platform-browser]

Parting words

Angular 9 Beta version is a great way to understand it thoroughly and provide preferred changes so that the actual version will come with the updated changes. The feedback gives and takes are going to be the most aggressive during this phase.  Original Source

[jhonatanshs]

Antes y después.. diseño

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Angular is a developer friendly language, it has huge diversity like template syntax, instance, Angular CLI, routers and it helps programmers work faster which increases productivity. The framework is also compatible with so many back-end programming languages to display gathered data in the UI efficiency.

[angulardevelopment]

How to display a component in Angular 9 with Example 

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[mobappdevelopmentcompany]

The top advantages of Angular9 Ivy: The future-generation Compiler!

The Angular team has amazed the entire software fraternity by releasing updated versions at frequent intervals! This is indeed a dynamic move to eliminate the road-blocks encountered by Angular app developers, leverage the goodies of emerging technologies and, provide a rich UX to customers. Angular has as many as 10 enhanced versions to its credit! Amongst these, Angular9 is one of the versions that offer multifarious breaking changes. Out of all these enhancements, the new Ivy Compiler in Angular’s V9 has stolen the show. Angular9 Ivy comes with unbeatable features that promise to make your app smaller and swifter. This article talks about the advantages of the Ivy Compiler of Angular9 and its crucial role in Angular app Development.

Ivy Compiler of V9 in a nutshell

Ivy refers to Angular’s future-generation compiling and rendering pipeline. With the introduction of Angular9 Ivy, now the newer version of the compiler and the runtime instructions are employed by default in place of the older one called View engine. This Ivy Compiler comes with numerous advantages for an Angular app Development Company.

Top Advantages of the Ivy Compiler in Angular9

Given below are the key advantages of the Ivy Compiler in Angular’s V9.

Default AOT Compilation: Quicker build times

In Angular’s previous versions, the developers preferred JIT compiler as the AOT compiler used to be very slow. However, the scenario has changed with the advent of Angular9 Ivy that enables the Ahead of Time (AOT) Compiler by default. The novel architecture of Ivy has worked wonders in improving the performance of the AOT Compiler. A compiler’s performance is measured based on the app’s overhead on the top of a plain TypeScript Compilation. Owing to Ivy, Angular’s AOT Compiler now performs approximately 40% better than it did earlier; as the overhead has reduced to 0.5X from 0.8X in the Angular documentation app. Thereby, the build times became quicker, proving to be a sigh of relief for the Angular app developers.

Reduction of bundle size

Unlike the earlier compiler View Engine, Ivy employs the tree-shaking technique to get rid of the unused code from applications. This leads to lesser code generation for each of the Angular components, thereby reducing the bundle size. Reduction in bundle sizes improves the app’s performance and proves beneficial to large applications having numerous components, as well as small applications that do not use too many Angular features.

Lazy Loading

Ivy enables the lazy loading of any component. Thereafter, these components are dynamically rendered without the need for routing or an Angular module. Also, the libraries used by the lazy-loaded components are bundled to form lazy-loaded chunks.

Better manipulation of styles

Ivy has simplified style-handling and merges them predictably. Earlier the bindings were dependant on the last evaluation and the timing when a change was made to these expressions. Now, there is a clear and consistent order denoting specific styles as per their precedence, instead of timing.

Multiple language support via a single app bundle

Owing to Ivy, the app can support various languages using a single app bundle with one hostname. Some additional set-up may be required though.

Easier debugging

The introduction of Ivy has ushered in more tools for debugging apps. To cite an example, the new “ng” object is available for debugging which enables the developers to obtain access to the directives, components, etc.

Speedy Testing

Thanks to Ivy, the application-testing speed has gone up by 40% to 50%. The reason is a revamped “TestBed” has been implemented which recompiles components used between test- cycles only if that component was manually overridden.

Added provider scopes

The new provider scopes “any” and “platform” have been introduced by the Ivy version of Angular. Provider scope “any” shares a provider for each module injector while “platform” scope can be shared across different Angular apps for the same document.

Better Internationalization

Internationalization refers to Angular’s existing feature which allows you to architect highly optimized apps as per the location. In Ivy, The quicker build-times are quicker due to pushing of build time substitutions later in the process, which makes this feature work much faster than before.

Better Type Checking

The Ivy Compiler is capable of checking more types of an application and applying more strict rules. Apart from the default type checks, there are some additional ones too. For instance, activating the flag “fullTemplateTypeCheck” signals the compiler to check all the aspects within the template, and activating the flag “strictTemplates” makes the compiler apply the strictest Type System rules available for type-checking. This functionality enables detecting bugs in the earlier stages of the developmental cycle itself.

Stronger Safety

In comparison to the erstwhile View Engine, Ivy is far more efficient in offering more safety. Furthermore, error messages become easier to read using Ivy.

Final Verdict

Thus, the Ivy Compiler in Angular’sV9, not only makes the Angular apps smaller, simpler and swifter but also gifts the Angular framework with a plethora of advantages. No wonder it is considered to be one of the most disruptive add-ons. Therefore, adopting this novel feature will indeed be a strategic move for any enterprise.

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[jhonatanshs]

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[sagar-jaybhay]

Angular Binding how it works and the Significance of package.lock.json

New Post has been published on https://sagarjaybhay.net/angular-binding-significance-of-package-lock-json/

Angular Binding how it works and the Significance of package.lock.json

In this article, Sagar Jaybhay explains different ways of angular binding in angular and Package.lock.json file significance in angular application.

Angular Binding

Their are 3 types of binding which are listed below.

One-Way binding( UI – – -> Component): when you want to send data from UI to Component you can use this. () angular bracket this syntax is used for one way binding from UI to Component.

One-Way binding [Component – – -> UI]: when you want to send data from Component to UI you can use Square brackets.

Two-Waybindig: when you want to send data from UI to Component and Component to UI you can use [()] this syntax.

Customer ID : <input [(ngModel)]="CustomerModel.CustomerID" type="text"> <br/> Customer Name : <input [(ngModel)]="CustomerModel.CustomerName" type="text"> <br/> Customer Amount : <input [(ngModel)]="CustomerModel.CustomerAmount" type="text"> <br/> <br/> <hr> <table> <tr><td>Customer ID</td><td>CustomerModel.CustomerID</td></tr> <tr><td>Customer Name </td><td>CustomerModel.CustomerName</td></tr> <tr><td>Customer Amount</td><td>CustomerModel.CustomerAmount</td></tr> </table>

But above code is not worked it will throw an error

ngModel Angular Error: Can’t bind to ‘ngModel’ since it isn’t a known property of ‘input’

why because angular have the modular approach and to work binding, it needs formModule for that purpose we need to import this in our customer.module.ts file now our code becomes.

import BrowserModule from '@angular/platform-browser'; import NgModule from '@angular/core'; import FormsModule from '@angular/forms' import AppRoutingModule from './Customer-routing.module'; import CustomerComponent from './Customer.component'; @NgModule( declarations: [ CustomerComponent ], imports: [ BrowserModule, AppRoutingModule, FormsModule ], providers: [], bootstrap: [CustomerComponent] ) export class AppModule

Package.Lock.json:

This package.lock.json tells us how npm versioning works.

In the above figure, 5.2.1 is our version in this 5 represents a major version, 2 is a minor version and 1 is revision. So by using the above image, you will understand version number is divided into 3 parts major, minor and revision.

Major version:– it means developer added new features remove the old one and major version incremented when there are breaking changes.

Minor Version: It is incremented when there are new features added but no breaking changes present.

Revision: it is incremented when patches or bug fixes.

The below image is for package.lock.json.

So if you check the above image if no symbol present in-front of version number then it is not updated automatically. Npm does not increment the major version automatically. But it gives provision for upgrading minor version and provision by using below symbols in front of version numbers.

^:- this for latest minor and revision version

~:- this is for the only install the latest revision

This is the file created after npm resolution and it created automatically.

GitHub Project Link: https://github.com/Sagar-Jaybhay/angular9

[djvillain]

Angular 9 Tutorial: Part 16 - Input Keyboard Events

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