Rupert  Beatty

Rupert Beatty

1628739185

How to Upcoming Improvements To angular Library Distribution

TLDR; In v12, we’ll deprecate our legacy compilation and rendering pipeline called View Engine. This change will not require any action by developers. Libraries dependent on View Engine will continue to work as expected via our compatibility compiler ngcc. If you’re a library author or interested in understanding technical details, please continue reading the sections below.

Angular’s new rendering and compilation pipeline, Ivy, has been the developers’ default experience for the past year. To ensure interoperability with the old pipeline, we maintain compatibility layers that have implications on development experience. In this post, you’ll learn our plan for moving away from the legacy compiler towards faster compilation and simplicity.

#angular 

 

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Buddha Community

How to Upcoming Improvements To angular Library Distribution
Christa  Stehr

Christa Stehr

1598940617

Install Angular - Angular Environment Setup Process

Angular is a TypeScript based framework that works in synchronization with HTML, CSS, and JavaScript. To work with angular, domain knowledge of these 3 is required.

  1. Installing Node.js and npm
  2. Installing Angular CLI
  3. Creating workspace
  4. Deploying your First App

In this article, you will get to know about the Angular Environment setup process. After reading this article, you will be able to install, setup, create, and launch your own application in Angular. So let’s start!!!

Angular environment setup

Install Angular in Easy Steps

For Installing Angular on your Machine, there are 2 prerequisites:

  • Node.js
  • npm Package Manager
Node.js

First you need to have Node.js installed as Angular require current, active LTS or maintenance LTS version of Node.js

Download and Install Node.js version suitable for your machine’s operating system.

Npm Package Manager

Angular, Angular CLI and Angular applications are dependent on npm packages. By installing Node.js, you have automatically installed the npm Package manager which will be the base for installing angular in your system. To check the presence of npm client and Angular version check of npm client, run this command:

  1. npm -v

Installing Angular CLI

  • Open Terminal/Command Prompt
  • To install Angular CLI, run the below command:
  1. npm install -g @angular/cli

installing angular CLI

· After executing the command, Angular CLI will get installed within some time. You can check it using the following command

  1. ng --version

Workspace Creation

Now as your Angular CLI is installed, you need to create a workspace to work upon your application. Methods for it are:

  • Using CLI
  • Using Visual Studio Code
1. Using CLI

To create a workspace:

  • Navigate to the desired directory where you want to create your workspace using cd command in the Terminal/Command prompt
  • Then in the directory write this command on your terminal and provide the name of the app which you want to create. In my case I have mentioned DataFlair:
  1. Ng new YourAppName

create angular workspace

  • After running this command, it will prompt you to select from various options about the CSS and other functionalities.

angular CSS options

  • To leave everything to default, simply press the Enter or the Return key.

angular setup

#angular tutorials #angular cli install #angular environment setup #angular version check #download angular #install angular #install angular cli

Roberta  Ward

Roberta Ward

1593184320

Basics of Angular: Part-1

What is Angular? What it does? How we implement it in a project? So, here are some basics of angular to let you learn more about angular.

Angular is a Typescript-based open-source front-end web application platform. The Angular Team at Google and a community of individuals and corporations lead it. Angular lets you extend HTML’s syntax to express your apps’ components clearly. The angular resolves challenges while developing a single page and cross-platform applications. So, here the meaning of the single-page applications in angular is that the index.html file serves the app. And, the index.html file links other files to it.

We build angular applications with basic concepts which are NgModules. It provides a compilation context for components. At the beginning of an angular project, the command-line interface provides a built-in component which is the root component. But, NgModule can add a number of additional components. These can be created through a template or loaded from a router. This is what a compilation context about.

What is a Component in Angular?

Components are key features in Angular. It controls a patch of the screen called a view. A couple of components that we create on our own helps to build a whole application. In the end, the root component or the app component holds our entire application. The component has its business logic that it does to support the view inside the class. The class interacts with the view through an API of properties and methods. All the components added by us in the application are not linked to the index.html. But, they link to the app.component.html through the selectors. A component can be a component and not only a typescript class by adding a decorator @Component. Then, for further access, a class can import it. The decorator contains some metadata like selector, template, and style. Here’s an example of how a component decorator looks like:

@Component({
    selector: 'app-root',
    templateUrl: 'app.component.html',
    styleUrls: ['app.component.scss']
})

Role of App Module

Modules are the package of functionalities of our app. It gives Angular the information about which features does my app has and what feature it uses. It is an empty Typescript class, but we transform it by adding a decorator @NgModule. So, we have four properties that we set up on the object pass to @NgModule. The four properties are declarations, imports, providers, and bootstrap. All the built-in new components add up to the declarations array in @NgModule.

@NgModule({
declarations: [
  AppComponent,
],
imports: [
  BrowserModule,
  HttpClientModule,
  AppRoutingModule,
  FormsModule
],
bootstrap: [AppComponent]
})

What is Data Binding?

Data Binding is the communication between the Typescript code of the component and the template. So, we have different kinds of data binding given below:

  • When there is a requirement to output data from our Typescript code in the HTML template. String interpolation handles this purpose like {{data}} in HTML file. Property Binding is also used for this purpose like [property] = “data”.
  • When we want to trigger any event like clicking a button. Event Binding works while we react to user events like (event) = “expression”.
  • When we can react to user events and output something at the same time. Two-way Binding is used like [(ngModel)] = “data”.

image for understanding data binding

#angular #javascript #tech blogs #user interface (ui) #angular #angular fundamentals #angular tutorial #basics of angular

Juana  O'Keefe

Juana O'Keefe

1601515800

Going to a library with Angular

Hi! Today we are going to learn how to create a library in angular and import that in other angular applications.

Prerequisites

  • Basic knowledge of angular
  • Node and NPM set up in the system

First clear out the Common thoughts

What are Angular Libraries?

An angular library is a collection of components, services, directives, etc. that can be shared across different Angular projects. More precisely, in programming, the Library is a collection of precompiled routines that a program can use.

An Angular library cannot run on its own. It must be imported as a package in an angular application. It is a shareable code which provides Reusable functionality.

Why do we need a Library?

Many applications need to solve the same general problems, such as presenting a unified user interface, presenting data, and allowing data entry. We as developers can create general solutions for particular domains that can be adapted for re-use in different apps. These solutions can be used locally in your workspace, or you can publish them as npm packages to share with other projects or with other Angular developers across the globe.

Certain solutions are complex in nature and recreating them everywhere we need it, is heck of a job. That’s why its better to create such complex solutions as libraries to reuse with ease.

That’s why libraries are important and angular embraces this functionality. Look at some of the angular core libraries like RXJS that are imported as a library in angular and we know how important RXJS is in the angular world. Just imagine if we didn’t have the RXJS as a library but instead, we had some functions in some documentation, and in order to use it, we have to copy-paste those functions into every component and angular application we create. That would be troublesome and hard to maintain.

Behind the scenes: ng-packagr

Angular has a compiling component name packagr whose only job is to maintain the integrity between the angular apps that import angular libraries. We create angular libraries with the different angular core versions and these libraries are imported into different angular apps that may or may not be based on the latest angular version. Some apps may be based on the latest angular 10 but some apps might be based on version 4 or 5. So, how does a library created with version 10 can work with an app based on version 5. For this, angular has a pretty build tool that specific to libraries as it packages them into a certain format that’s compatible with any version of angular (not any, just the ones that are supported).

The tool name is ng-packagr which is used to compile and package a Typescript library to angular package format. This packagr makes sure that what we want to reuse in other angular apps must follow certain guidelines/rules.

These guidelines are Angular Package Format – a set of instructions that make sure whatever you are packaging will be able to integrate into other angular apps.

Current guideline – https://docs.google.com/document/d/1CZC2rcpxffTDfRDs6p1cfbmKNLA6x5O-NtkJglDaBVs/preview

Let’s code!!

Creating angular workspace without application

Hit this command in your terminal, opened up where you want to have the directory –

ng new <workspace-name> --create-application=false

Terminal execution of the command

This command creates a mono repo structure for angular workspace. Mono repo structure refers to a structure that not only contains one project but many. These structures are suitable for the applications that divided into several projects but are correlated to each other. For example, a UI whose navbar is a separate project, whose sidebar is a separate project, and further too. Each visual element dynamic element is separately handled in a different project with free choice of using any dev dependencies. These kinds of front-ends are also known as** micro front-ends.**

With mono repo, we will have the angular library and library consumer app in the same workspace.

Hit the below command, inside the created directory

ng generate library <library-name>

Library command output

#angular #web application #angular #angular-library #npm

Monty  Boehm

Monty Boehm

1620804540

Upcoming Improvements to angular Library Distribution

TLDR; In v12, we’ll deprecate our legacy compilation and rendering pipeline called View Engine. This change will not require any action by developers. Libraries dependent on View Engine will continue to work as expected via our compatibility compiler _ngcc_. If you’re a library author or interested in understanding technical details, please continue reading the sections below.

Angular’s new rendering and compilation pipeline, Ivy, has been the developers’ default experience for the past year. To ensure interoperability with the old pipeline, we maintain compatibility layers that have implications on development experience. In this post, you’ll learn our plan for moving away from the legacy compiler towards faster compilation and simplicity.

Ivy has been a multi-year effort to make Angular simpler, faster, and easier to maintain. We’ve been fine-tuning the balance between static checks and dynamic constructs to ensure Angular continues to provide type checking, efficient build-time optimizations, and fast change detection.

Starting with version 9, we enabled Ivy for all-new Angular applications and provided a smooth, automated update path. To ensure backward compatibility of applications with libraries using the previous rendering and compilation pipeline (View Engine), we developed a compatibility compiler called ngcc.You’ve probably noticed ngcc run after you create a new project or install a dependency.

Running the Angular compatibility compiler

Running the Angular compatibility compiler

#angularjs #angular #angular-12

Monty  Boehm

Monty Boehm

1619511751

Upcoming Improvements to angular Library Distribution

TLDR; In v12, we’ll deprecate our legacy compilation and rendering pipeline called View Engine. This change will not require any action by developers. Libraries dependent on View Engine will continue to work as expected via our compatibility compiler _ngcc_. If you’re a library author or interested in understanding technical details, please continue reading the sections below.

Angular’s new rendering and compilation pipeline, Ivy, has been the developers’ default experience for the past year. To ensure interoperability with the old pipeline, we maintain compatibility layers that have implications on development experience. In this post, you’ll learn our plan for moving away from the legacy compiler towards faster compilation and simplicity.

Ivy has been a multi-year effort to make Angular simpler, faster, and easier to maintain. We’ve been fine-tuning the balance between static checks and dynamic constructs to ensure Angular continues to provide type checking, efficient build-time optimizations, and fast change detection.

Starting with version 9, we enabled Ivy for all-new Angular applications and provided a smooth, automated  update path. To ensure backward compatibility of applications with libraries using the previous rendering and compilation pipeline (View Engine), we developed a compatibility compiler called ngcc.You’ve probably noticed ngcc run after you create a new project or install a dependency.

Running the Angular compatibility compiler

Running the Angular compatibility compiler

#angularjs #angular #angular-12