#angular 7 reactive form example | Explore Tumblr posts and blogs

anupbhagwat7 · 5 years ago

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Angular 7 - CRUD Operations

This is very huge post which covers most of the angular concepts , so please be patient and go through it. This post is related to angular CRUD operations using angular AG grid and REST webservices in java. We will go through below concepts while going through these post - REST API in javaAG Grid in javaBootstrap Configuration Notifications service configurationReactive forms in angularForm ValidationsService in angularCalling REST API using HttpClientRouting and Navigation 1.REST API in java We would need to create a REST API which supports CRUD operations on user data as below - package com.myjavablog.controller; import com.myjavablog.entity.User; import com.myjavablog.repository.UserRepository; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; import java.util.List; import java.util.Optional; @CrossOrigin @RestController @RequestMapping("/api") public class UserController { @Autowired private UserRepository userRepository; @GetMapping("/users") public List getUsers(){ return userRepository.findAll(); } @GetMapping("/user/{id}") public Optional getUser(@PathVariable Long id){ return userRepository.findById(id); } @DeleteMapping("/user/{id}") public boolean deleteUser(@PathVariable Long id){ userRepository.deleteById(id); return true; } @PostMapping("/user") public User createUser(@RequestBody User user){ return userRepository.save(user); } @PutMapping("/user") public User updateUser(@RequestBody User user){ return userRepository.save(user); } } This is the controller in java which supports GET,UPDATE,PUT,POST operations on USER data. You can download the entire code from below Github link - Download 2. AG Grid in java Before actually going into angular project, you can go through my older posts on how to create angular project. http://www.myjavablog.com/2019/04/13/angular-installation-and-setup/ Once the project is created you need to install ag-grid support to it. Below packages needs to be installed for the same - npm i --save ag-grid You need to import this dependency in app.module.ts by adding below line under imports - AgGridModule.withComponents(null) Also you need to add CSS support for grid in styles.css - @import 'ag-grid-community/dist/styles/ag-grid.css'; @import 'ag-grid-community/dist/styles/ag-theme-blue.css Then create a component using below command - ng n c user This will create new user component and create CSS, TS , html files. Add code to html file for grid -

Angular 7 AG Grid CRUD Operations Example

Add User Edit User Delete User All the options specified in grid configuration are self explanatory. You also need Typescript file in order to perform CRUD operations . You get this from my github link. 3. Bootstrap Configuration First install bootstrap by using below npm command - npm install bootstrap Then Add bootstrap to angular.json under styles- "styles": , 4. Notifications service configuration This service is to show the notifications to users. Use below npm command to install - npm install angular-notifier Add it into imports in app.module.ts and add custom options as well- NotifierModule.withConfig( customNotifierOptions ) /** * Custom angular notifier options */ const customNotifierOptions: NotifierOptions = { position: { horizontal: { position: 'middle', distance: 12 }, vertical: { position: 'top', distance: 12, gap: 10 } }, theme: 'material', behaviour: { autoHide: 5000, onClick: false, onMouseover: 'pauseAutoHide', showDismissButton: true, stacking: 4 }, animations: { enabled: true, show: { preset: 'slide', speed: 300, easing: 'ease' }, hide: { preset: 'fade', speed: 300, easing: 'ease', offset: 50 }, shift: { speed: 300, easing: 'ease' }, overlap: 150 } }; Also you would need to add CSS for notifier in app.component.html file as below - 5. Reactive forms in angular Now you need to create user form to add users -

Add User

First Name: First name is required Last Name: Last name is required Email address: Email is required Age: Age is required Mobile: Mobile number is required Submit Invalid credentials. Back 6. Form Validations With reactive forms ,you can associate FormGroup and FormBuilder and access the form fields . Using these objects , you can also validate the form fields using angular Validators. 7. Services in Angular We have to write the service to call the REST APIs and perform CRUD operations as below - Create service using - ng g s user import { Injectable } from '@angular/core'; import { User } from './../model/user'; import {HttpClient} from '@angular/common/http'; @Injectable({ providedIn: 'root' }) export class UserService { apiUrl:string = "http://localhost:8081/api/"; constructor(private http : HttpClient) { } getUsers() { return this.http.get(this.apiUrl+'users'); } deleteUser(userId: number){ return this.http.delete(this.apiUrl+'user/'+userId); } addUser(user: User){ console.log(user); return this.http.post(this.apiUrl+ 'user/', user ); } editUser(user: User){ console.log(user); return this.http.put(this.apiUrl+ 'user/', user ); } } 8. Calling REST API using HttpClient In above service, we are injecting HttpClient in constructor to call the REST API. 9. Routing and Navigation We would need to provide routing for our application. So specific URI will be served by specific Component. Route configuration is provided in app-routing.module.ts as below - import { NgModule } from '@angular/core'; import { Routes, RouterModule } from '@angular/router'; import { LoginComponent } from './components/login/login.component'; import { UserComponent } from './components/user/user.component'; import { AddUserComponent } from './components/user/add-user/add-user.component'; const routes: Routes = ; @NgModule({ imports: , exports: }) export class AppRoutingModule { } You can download the code for this application from below github link - Download Now build the application and serve it to the client - ng build ng serve Now the application is ready to access on http://localhost:4200/-

Angular ag grid showing all users

Add New User

User Editing

Updated last name and email

User Deleted

Form Validations Read the full article

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t-baba · 5 years ago

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The most popular JavaScript links of 2019

#469 — January 3, 2020

Read on the Web

JavaScript Weekly

The holiday season is rapidly coming to a close and we're looking forward to not only a new year but the entirety of the Roaring Twenties. Rest assured, the JavaScript world is not going to look the same when 2030 turns up so watch this space! 😄

We'll be back as usual next week, but this week we're taking a look back at 2019 and the most popular things you clicked on. If you didn't read every issue in 2019 (we wouldn't expect you to!) you'll hopefully find a few things worth revisiting here.

Thanks for supporting us — we look forward to keeping you up-to-date in the years to come.

— Peter Cooper and the Cooperpress team

📈 Our most popular links of 2019:

1. The TypeScript Tax: A Cost vs Benefit Analysis — As much as we love JavaScript, this was really a strong year for TypeScript, with it seeming to become the de facto way to bring strong typing to JavaScript. Back in January, Eric Elliott asked "is it worth it?" and presented some critical, data-driven analysis to establish its viability. It was your most clicked link of 2019.

Eric Elliott

2. New ES2018 Features Every JavaScript Developer Should Know — We're now looking forward to ES2020 and we've had ES2019 in 2019 too, but this post remains packed with interesting examples of spread properties within object literals, asynchronous iterators and asynchronous iterables, Promise.prototype.finally, and other features that are still not exactly common to see in the wild.

Faraz Kelhini

The Complete ⚛️ React Learning Path — Take your React to the next level to find out what it is fully capable of with this comprehensive learning path.

Frontend Masters sponsor

3. 43 JavaScript Questions, With Their Answers Explained — Whether for fun or a job interview, this remains an interesting set of JavaScript-related questions, complete with explanations of the answers.

Lydia Hallie

4. I Don't Hate Arrow Functions (But..) — Arrow functions (=>), as introduced in ES6, have generally been a much welcomed addition to JavaScript but Kyle Simpson reminded us they’re not suitable in every scenario and created an ESLint plugin to help you keep a handle on their use.

Kyle Simpson

5. Responsible JavaScript: A Three Part Series — We originally only linked to part one of this great series where Jeremy Wagner plotted a course to avoid the unnecessary bloat and inaccessible patterns of modern JavaScript trends.. but now you can enjoy part 2 and part 3 too, where he went into more technical depth on bundling and handling third-party scripts.

Jeremy Wagner

6. What’s New in JavaScript — At this year’s Google I/O ’19, Mathias Bynens and Sathya Gunasekaran of the V8 team gave a fantastic 30 minute ‘state of the union’ talk on the state of JavaScript as a language and what new features are being baked in.

Google I/O video

💻 Jobs

JavaScript Developer at X-Team (Remote) — Work with the world's leading brands, from anywhere. Travel the world while being part of the most energizing community of developers.

X-Team

Senior Software Engineer, Frontend — Use the latest tech to mold an innovative, empathy-centric experience for creators to order fast, high-quality parts (forging space robots to animatronics).

Fictiv

Find a Job Through Vettery — Vettery is completely free for job seekers. Make a profile, name your salary, and connect with hiring managers from top employers.

Vettery

📘 The most popular articles & tutorials of 2019

The Cost of JavaScript in 2019 — Addy Osmani presented a 2019 update to his Cost of JavaScript in 2018 article in both video and article forms. If you still want to get a feel for where the true bottlenecks are with JavaScript, this is a must read.

Addy Osmani

Should We Rebrand 'JavaScript'? — This thoughpiece provoked quite a bit of discussion in the community over the problems (or not) with ‘JavaScript’ as a name. I think we'll see more on this front in 2020.

Kieran Potts

First Online Mentored Software Bootcamp w/ Job Guarantee — Get a job or your money back with Springboard’s online bootcamp. Benefit from 1:1 mentorship, our exclusive curriculum, and top career coaching.

Springboard (Software Engineering Career Track) sponsor

When Should You Be Using Web Workers? — Web Workers provide a way to run JavaScript in background threads in the browser and you’d think using them as much as possible would be a good thing.. right? Current frameworks make this tough, says Surma, who shows us why we should be working to change this ASAP.

Surma

Practical Ways to Write Better JavaScript — You’re not necessarily going to agree with all of them (e.g. “Use TypeScript”!) but this is a reasonably solid batch of points to think about overall.

Ryland Goldstein

JavaScript Symbols: But Why? — Not played with symbols (a new data type introduced with ES6) yet? This is a gentle way to get up to speed with not only what they are but why you might use them.

Thomas Hunter II

Make 2020 the Year to Master MongoDB. Try Studio 3T Today — Generate driver code for JavaScript, Python, Ruby and more? Build queries fast with our drag & drop editor? Of course.

Studio 3T sponsor

Using Native JavaScript Modules in Production Today — “now, thanks to some recent advances in bundler technology, it’s possible to deploy your production code as ES2015 modules—with both static and dynamic imports—and get better performance than all non-module options currently available.”

Philip Walton

7 Tricks with Resting and Spreading JavaScript Objects — Using modern JS features to merge objects, organize properties, and more.

Joel Thoms

📺 The most popular videos of 2019

▶ Why I Was Wrong About TypeScript — Smells like an opinion-driven talk, but actually covers the history behind compile-to-JS languages, how we got to a point where interest in TypeScript is growing strongly, and why it’s worth taking seriously.

TJ VanToll

▶ Why 0.1 + 0.2 === 0.30000000000000004: Implementing IEEE 754 in JS — Head to your node CLI right now and type in 0.1 + 0.2. If the answer confuses you, this is the video for you. And even if you know why, working with the building blocks behind floating point representations is just cool anyway.

Low Level JavaScript

Video Developer Report - Top Trends in Video Technology 2019

Bitmovin sponsor

▶ Keep Betting on JavaScript — Kyle Simpson presents a history lesson of JavaScript, looks at how a variety of features were (or weren’t) introduced, and compels us to think about the future of the Web and JavaScript as we contribute and ‘place bets’ on technologies.

Kyle Simpson

▶ A Look at Deno: A New(ish!) JavaScript Runtime — Ryan originally created Node about ten years ago but over the past couple of years he’s been working on Deno, a non-Node compatible, TypeScript-focused runtime with some interesting features. (Note: Poor audio until a few minutes in.) I suspect we'll hear a lot more about this in 2020.

Ryan Dahl

🔧 The most popular code & tool releases of 2019

Svelte 3 Released: Rethinking Reactivity — Svelte is one of the most interesting UI frameworks out there as it’s not scared of taking a unique approach. Rather than running in the browser, Svelte runs at build time, compiling your app into more efficient runtime JavaScript. Svelte 3 took some major steps forward, particularly in helping you write less code.

Rich Harris

Mithril.js 2: A JavaScript Framework for Building Brilliant Applications — Mithril is a really neat alternative to things like Vue, React or Angular. It’s very compact and fast (so ideal for mobile), runs a bit closer to vanilla JS than the alternatives, and is great for tying together vanilla JS libraries rather than needing its own alternatives.

Mithril

RunJS: A JavaScript 'Scratchpad' Tool for the Desktop — Write and run JavaScript instantly. Useful for learning, experimenting, or perhaps even creating screencasts, tweets, or similar educational content. Originally macOS only but now supports Windows and Linux too.

Luke Haas

Pixi.js 5: Create Beautiful 2D Web Experiences — Boasts the ‘fastest, most flexible 2D WebGL renderer’ to let you take advantage of hardware acceleration without getting involved in WebGL or 3D concerns. Check out demos for what the code looks like and what you’d use it for. There’s also a Pixi Playground for quickly crafting your own experiments.

PixiJS

Babylon.js 4.0: The (Very) Powerful WebGL Graphics Engine — Such a significant release that they released a 2 minute video trailer for it! Want to play? Enjoy this editable live demo.

Microsoft

Postwoman: An API Request Builder and Tester — A free alternative to Postman, a popular app for debugging and testing HTTP APIs. Postwoman works in the browser and supports HTTP and WebSocket requests as well as GraphQL. Insomnia is a similar tool if you want to run something as a desktop app.

Liyas Thomas

FlexSearch.js: A Full Text Search Library — Claims to outperform all of the alternatives while supporting features like multi-word matching and phonetic transformations. Happy in both the browser and Node.js.

Nextapps GmbH

Just: A JavaScript Task Library from Microsoft — If you’re familiar with Ruby’s rake, it’s a bit like that. Define tasks in JavaScript, run them with just (which works fine without installation using npx) and you get a bunch of nice features like logging and task composition.

Microsoft

Node-RED 1.0 Released — Node RED is a flow-based, visual programming tool (aimed primarily at hardware automation) that’s built on top of Node.js. Despite only reaching 1.0 in 2019, it’s a mature project used in numerous real world IoT projects.

Nick O'Leary

by via JavaScript Weekly https://ift.tt/2QHifL3

#Javascript Branding #Javascript Weekly

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sagar-jaybhay · 6 years ago

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Forms,Form-validation,FormControl & FromGroup

New Post has been published on https://is.gd/oDoCXw

Forms,Form-validation,FormControl & FromGroup

How to Build a Form,Validation,FormControl,FormGroup in Angular?

Now in our application, we want to create the contact form so we use below ng-cli command to generate all component related data once.

D:\Target Dec-2019\Angular_Application\hello-sagar-jaybhay>ng g c contact-form CREATE src/app/contact-form/contact-form.component.html (27 bytes) CREATE src/app/contact-form/contact-form.component.spec.ts (664 bytes) CREATE src/app/contact-form/contact-form.component.ts (292 bytes) CREATE src/app/contact-form/contact-form.component.css (0 bytes) UPDATE src/app/app.module.ts (1307 bytes)

These are files created by using cli command and added a reference to app.module.ts file.

Now first we build contact form with bootstrap CSS.

<p>contact-form works!</p> <div class="container-fluid" style="width: 50%"> <form> <div class="form-group"> <label for="firstName">First Name</label> <input id="firstName" type="text" class="form-control"> </div> <div class="form-group"> <label for="comment">Comment</label> <textarea id="comment" col=30 rows="10" type="textare" class="form-control"></textarea> </div> <div class="form-group"> <button class="btn btn-primary form-control" >Submit</button> </div> </form> </div>

FormControl

Now we need to add validation for our form elements, so in angular, we have FormControl class by using this we will check the value of field,also field is touched or not touched,is value is dirty or not, is value pristine means value is not changed. So for each input field in the form we need control object.

Tracks the value and validation status of an individual form control. In this FormControl class is inherited from AbstractControl class. This is one of the three fundamental building blocks of Angular forms, along with FormGroup and FormArray. It extends the AbstractControl class that implements most of the base functionality for accessing the value, validation status, user interactions, and events.

FormGroup

All the property of formcontrol class are available to FormGroup class means dirty,value,touched,untouched like properties are present in FormGroup.

A FormGroup aggregates the values of each child FormControl into one object, with each control name as the key. It calculates its status by reducing the status values of its children. For example, if one of the controls in a group is invalid, the entire group becomes invalid.

FormGroup is one of the three fundamental building blocks used to define forms in Angular, along with FormControl and FormArray.

When instantiating a FormGroup, pass in a collection of child controls as the first argument. The key for each child registers the name for the control.

It will send the value is valid or not if all the elements in form are valid else it will give not valid. So accessing properties of FormGroup are easier than accessing all the elements properties are present on that form.

Difference between Reactive Forms in Angular and Template-Driven forms in Angular?

Reactive Forms Template Driven Forms Here we have more control over validation logic. Simple Validation present It is also good for complex forms. It is good for simple forms. It is good for the Unit Test. It is easier to create Less code is required

ngModel

In angular ngModel directive creates the FormControl instance and it will track value, user interaction and also validation status of that respective control. It will keep view sync with the model.

It accepts a domain model as an optional Input. If you have a one-way binding to ngModel with [] syntax, changing the value of the domain model in the component class sets the value in the view. If you have a two-way binding with [()] syntax (also known as ‘banana-box syntax’), the value in the UI always syncs back to the domain model in your class.

Now remember ngModel requires name attribute. If you can’t specify the name attribute it will throw an error.

So to avoid this error we simply put name attribute like below.

When we add ngModel with name directive on control then angular automatically create an instance of FormControl class and associate with that control.

Now we are going to add change event and for this, we add change event to this input field.

To inspect the properties of the associated FormControl (like validity state), export the directive into a local template variable using ngModel as the key (ex: #myVar="ngModel").

#firstName=”ngModel” this is called template variable.

Now you can see below image on change event we get NgModel object.

NgModel is an object and below are the properties of that object. And NgModel is the instance of FormControl class.

1. NgModel _parent: NgForm, name: "firstName", valueAccessor: DefaultValueAccessor, _rawValidators: Array(0), _rawAsyncValidators: Array(0), … 1. control: FormControl validator: null, asyncValidator: null, _onCollectionChange: ƒ, pristine: false, touched: true, … 2. model: "" 3. name: "firstName" 4. update: EventEmitter _isScalar: false, observers: Array(0), closed: false, isStopped: false, hasError: false, … 5. valueAccessor: DefaultValueAccessor _renderer: DebugRenderer2, _elementRef: ElementRef, _compositionMode: true, onChange: ƒ, onTouched: ƒ, … 6. viewModel: "sagar" 7. _parent: NgForm submitted: false, _directives: Array(1), ngSubmit: EventEmitter, form: FormGroup 8. _rawAsyncValidators: [] 9. _rawValidators: [] 10. _registered: true 11. asyncValidator: (...) 12. dirty: (...) 13. disabled: (...) 14. enabled: (...) 15. errors: (...) 16. formDirective: (...) 17. invalid: (...) 18. path: (...) 19. pending: (...) 20. pristine: (...) 21. status: (...) 22. statusChanges: (...) 23. touched: (...) 24. untouched: (...) 25. valid: (...) 26. validator: (...) 27. value: (...) 28. valueChanges: (...) 29. __proto__: NgControl

More info on this link-https://angular.io/api/forms/NgModel

Validation Of Input Element

Now if we want to add multiple validation on input field we are added like below.

<label for="firstName">First Name</label> <input minlength="3" required pattern="sagar" ngModel name="firstNames" id="firstName" #firstNames="ngModel" type="text" (change)="log(firstNames)" class="form-control"> <div *ngIf="firstNames.errors?.required">First Name Should required</div> <div *ngIf="firstNames.errors?.minlength">First Name minimum length 3 is required</div> <div *ngIf="firstNames.errors?.pattern">Pattern should match</div> <div class="alert alert-danger" *ngIf="firstNames.touched && !firstNames.valid">First Name is Not Valid</div>

And if validation not matched the output is like below image.

In this we apply html inbuilt validation on control and it is applicable in angular also. So by using errors object we can check the respective validation.

<div *ngIf="firstNames.errors?.required">First Name Should required</div>

So in the above tag in *ngIf we are using firstNames as a template variable and by using that template variable we use errors property of FormControl instance because it creates formcontrol instance why bcoz we use ngModel with name property. If the errors object is not null then it will check the required subfield of that errors object.

Now you want to red the inputbox border to do this we check the CSS and if that all CSS present on that formcontrol we apply style so

.form-control.ng-invalid.ng-touched border: 1px solid red;

This is the style by which we apply red border on input text box. The output of this like below.

Form tag in angular

When angular see <form> tag in Html then angular automatically add ngForm directive to that form.

Ngform have output property ngSubmit. In below html of contact form.

<form #f="ngForm" (ngSubmit)="Submit(f)"> <div class="form-group"> <label for="firstName">First Name</label> <input minlength="3" required pattern="sagar" ngModel name="firstNames" id="firstName" #firstNames="ngModel" type="text" (change)="log(firstNames)" class="form-control"> <div *ngIf="firstNames.errors?.required">First Name Should required</div> <div *ngIf="firstNames.errors?.minlength">First Name minimum length 3 is required</div> <div *ngIf="firstNames.errors?.pattern">Pattern should match</div> <div class="alert alert-danger" *ngIf="firstNames.touched && !firstNames.valid">First Name is Not Valid</div> </div> <div class="form-group"> <label for="comment">Comment</label> <textarea id="comment" ngModel name="comment" #comment="ngModel" col=30 rows="10" type="textare" class="form-control"></textarea> </div> <div class="form-group"> <button class="btn btn-primary form-control" >Submit</button> </div> </form> </div>

In a form tag, we create #f is a template variable and of that form tag we use ngSubmit event for generating the output. Now you can see if we submit that button present on the form the output on a console we get.

1. NgForm submitted: true, _directives: Array(2), ngSubmit: EventEmitter, form: FormGroup 1. form: FormGroup validator: null, asyncValidator: null, _onCollectionChange: ƒ, pristine: true, touched: false, … 2. ngSubmit: EventEmitter _isScalar: false, observers: Array(1), closed: false, isStopped: false, hasError: false, … 3. submitted: true 4. _directives: (2) [NgModel, NgModel] 5. control: FormGroup 6. controls: (...) 7. dirty: (...) 8. disabled: (...) 9. enabled: (...) 10. errors: (...) 11. formDirective: (...) 12. invalid: (...) 13. path: (...) 14. pending: (...) 15. pristine: (...) 16. status: (...) 17. statusChanges: (...) 18. touched: (...) 19. untouched: (...) 20. valid: (...) 21. value: (...) 22. valueChanges: (...) 23. __proto__: ControlContainer

This is the form object of FormGroup class and has some same properties as the FormControl instance object like ngModel.

In this form object value is JSON object by which we can get value from our form and it is a key-value representation of that form element. Also remember the name we assign is taken into consideration while getting the value.

NgModelGroup

This directive can only be used as a child of NgForm (within <form> tags).

Use this directive to validate a sub-group of your form separately from the rest of your form, or if some values in your domain model make more sense to consume together in a nested object.

Provide a name for the sub-group and it will become the key for the sub-group in the form’s full value. If you need direct access, export the directive into a local template variable using ngModelGroup (ex: #myGroup="ngModelGroup").

In angular, we have two classes to check state of input field and their validity.

FormControl

FormGroup

FormControl:- it will check only one input field like input text box, textarea like that. When we apply ngModel to input field angular create instance of FormControl and associate that with this input field.

FormGroup:- It is used to represent the entire form and also an option we have to make a group within a form. ngForm directive automatically apply to all form element. So this will automatically create formgroup object and associate that with that form. By using this formgroup object we can check the state changes of that form and its validity.

What is the difference between ngModelGroup and ngForm?

In this ngForm have output property ngSubmit by using this we able to submit the form and this property is not present in the ngModelGroup. So ngModelGroup not able to submit the value as a part of a form.

How to disable button till form is completely filled or valid?

<button class="btn btn-primary form-control" [disabled]="!f.valid">Submit</button>

In the above code, we use disabled attribute and in this we check form is valid or not. F is template variable of respective form and it is used to check the validation of all control at once.

ngValue is used to select a complete object.

#Angular #angular 4 #Sagar Jaybhay

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positronx · 6 years ago

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#template driven select dropdown

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learninglcom · 6 years ago

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Angular 7 (formerly Angular 2) - The Complete Guide

Master Angular (Angular 2+, incl. Angular 7) and build awesome, reactive web apps with the successor of Angular.js What you'll learn : Develop modern, complex, responsive and scalable web applications with Angular 7 Fully understand the architecture behind an Angular 7 application and how to use it Use their gained, deep understanding of the Angular 7 fundamentals to quickly establish themselves as frontend developers Create single-page applications with one of the most modern JavaScript frameworks out there Requirements : NO Angular 1 or Angular 2 knowledge is required! Basic HTML and CSS knowledge helps, but isn't a must-have Prior TypeScript knowledge also helps but isn't necessary to benefit from this course Basic JavaScript knowledge is required Description : This course starts from scratch, you neither need to know Angular 1 nor Angular 2! (Angular 7 simply is the latest version of Angular 2) Join the most comprehensive and popular Angular course on Udemy, because now is the time to get started! From Setup to Deployment, this course covers it all! You'll learn all about Components, Directives, Services, Forms, Http Access, Authentication, Optimizing an Angular App with Modules and Offline Compilation and much more - and in the end: You'll learn how to deploy an application! But that's not all! This course will also show you how to use the Angular CLI and feature a complete project, which allows you to practice the things learned throughout the course! And if you do get stuck, you benefit from an extremely fast and friendly support - both via direct messaging or discussion. You have my word! ;-) Angular is one of the most modern, performance-efficient and powerful frontend frameworks you can learn as of today. It allows you to build great web apps which offer awesome user experiences! Learn all the fundamentals you need to know to get started developing Angular applications right away. Hear what my students have to say Absolutely fantastic tutorial series. I cannot thank you enough. The quality is first class and your presentational skills are second to none. Keep up this excellent work. You really rock! - Paul Whitehouse The instructor, Max, is very enthusiastic and engaging. He does a great job of explaining what he's doing and why rather than having students just mimic his coding. Max was also very responsive to questions. I would recommend this course and any others that he offers. Thanks, Max! As a person new to both JavaScript and Angular 2 I found this course extremely helpful because Max does a great job of explaining all the important concepts behind the code. Max has a great teaching ability to focus on what his audience needs to understand. This Course uses TypeScript TypeScript is the main language used by the official Angular team and the language you'll mostly see in Angular tutorials. It's a superset to JavaScript and makes writing Angular apps really easy. Using it ensures, that you will have the best possible preparation for creating Angular apps. Check out the free videos for more information. TypeScript knowledge is, however, not required - basic JavaScript knowledge is enough. Why Angular? Angular is the next big deal. Being the successor of the overwhelmingly successful Angular.js framework it’s bound to shape the future of frontend development in a similar way. The powerful features and capabilities of Angular allow you to create complex, customizable, modern, responsive and user friendly web applications. Angular 7 simply is the latest version of the Angular framework and simply an update to Angular 2. Angular is faster than Angular 1 and offers a much more flexible and modular development approach. After taking this course you’ll be able to fully take advantage of all those features and start developing awesome applications immediately. Due to the drastic differences between Angular 1 and Angular (=Angular 7) you don’t need to know anything about Angular.js to be able to benefit from this course and build your futures projects with Angular. Get a very deep understanding of how to create Angular applications This course will teach you all the fundamentals about modules, directives, components, databinding, routing, HTTP access and much more! We will take a lot of deep dives and each section is backed up with a real project. All examples showcase the features Angular offers and how to apply them correctly. Specifically you will learn : Which architecture Angular uses How to use TypeScript to write Angular applications All about directives and components, including the creation of custom directives/ components How databinding works All about routing and handling navigation What Pipes are and how to use them How to access the Web (e.g. RESTful servers) What dependency injection is and how to use it How to use Modules in Angular How to optimize your (bigger) Angular Application We will build a major project in this course and much more! Pay once, benefit a lifetime! Don’t lose any time, gain an edge and start developing now! Who this course is for : Newcomer as well as experienced frontend developers interested in learning a modern JavaScript framework This course is for everyone interested in learning a state-of-the-art frontend JavaScript framework Taking this course will enable you to be amongst the first to gain a very solid understanding of Angular Download Torrent Read the full article

#Angular 2 #Angular 7 #Develop modern #frameworks #Javascript #Udemy

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isearchgoood · 5 years ago

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March 12, 2020 at 10:00PM - 2018 Essential JavaScript Coding Bundle (96% discount) Ashraf

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suzanneshannon · 6 years ago

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8 Most Interesting JavaScript Frameworks to Learn in 2019

Web development has become so complex, that these days many developers rely on frameworks when building applications for the web. JavaScript frameworks speed up the development workflow, enforce best practices, and provide you with a maintainable code base and an effective architecture.

In this collection, you can find 8 awesome JavaScript frameworks that might be worth your attention in 2019. It’s not a comprehensive list by any means, but it can be a good starting point to assess the landscape of JavaScript frameworks and decide what to learn next.

1. React

React is a popular JavaScript framework, created and maintained by Facebook. You can use it to build interactive user interfaces for single page applications. React has introduced a component-based architecture to web development that challenged the traditional MVC (Model-View-Controller) pattern. React components are encapsulated and manage their own states. When the data changes, React updates only the components that have been affected by the change.

There’s a huge ecosystem around React, including learning materials, an enthusiastic developer community, and a plethora of tools. Although React has been around for a while, it’s still evolving. There are a lot of jobs for React developers, too. If you want to master a JavaScript framework that will likely stay relevant in the future React is definitely worth your time.

2. Vue.js

Vue.js allows you to build single page applications and UI components using a lightweight and versatile JavaScript framework. It’s progressive which means you can use it as both a library that adds extra features to an existing user interface or a framework that runs your whole application. Vue is frequently compared to React, as it also splits a web page into reusable components.

Vue uses its own HTML template syntax with which you can bind the rendered DOM to the underlying data. When the data changes, Vue automatically updates all instances in the HTML. Although React is still more popular, Vue is quickly catching up. It has a flat learning curve, great dev tools (even a Vue CLI), and some decent learning resources, too.

3. Angular

Angular is a TypeScript-based JavaScript framework developed and maintained by Google. The versioning of the Angular framework is a bit confusing. Angular 2 was a ground-up rewrite of AngularJS (1.x). By now, it has reached version number 7 (Angular 7). While AngularJS was an MVC (Model-View-Controller) framework, Angular 2+ is considered component-based. They follow a completely different logic, so AngularJS apps can’t be updated to Angular 2+.

With Angular, you can create single-page applications for any platforms, including web, mobile web, native mobile, and native desktop. It’s a great choice if you have already used a statically-typed language such as Java, C++, or C#. It takes more time to learn Angular than Vue or React, as it has a large code base and several possibilities. But, it has a huge ecosystem and is very popular on the job market, too.

4. Next.js

Next.js is a minimalist JavaScript framework that makes server-side rendering possible in React applications. By default, React renders all content on the client side, which leads to a couple of problems. First, the user has to wait until all scripts load in the browser. Second, it might cause some SEO issues, too, as search engines are still not that good at indexing JS apps. The solution to this problem is rendering content on the server side before sending it to the browser. And, this is what Next.js does really well.

It comes with awesome features such as hot code reloading, automatic code splitting, automatic routing, and more. If you use Next together with React, you get Vue’s simplicity combined with React’s powerful features. If you already use React, Next is definitely a good next step in mastering JavaScript app development. Next.js has great in-house tutorials that let you get started with the framework in just 1-2 hours (if you are an experienced JS developer).

5. Relay

Relay is another JavaScript framework that helps you create better React applications. Just like React, Relay is also developed and maintained by Facebook. It allows you to create data-driven React apps powered by GraphQL. GraphQL is a query language with which you can make specific server requests—it’s considered as an alternative to REST.

The Relay framework enables you to create static queries by adding GraphQL to the views that will use the data. Then, Relay aggregates these queries into consistent network requests. By generating code ahead of time, you can create faster and more performant applications. You can either convert your existing React apps with Relay or start to develop a new one using Relay Modern (a streamlined version of the Relay framework).

6. Mithril.js

Mithril is a lightweight JavaScript framework with several features similar to React and Vue. You can check out the detailed framework comparison to React, Vue, and Angular in Mithril’s documentation. If you are on the look for a really small framework that lets you build single page applications, Mithril might be an excellent choice for you. It weighs just 8 KB (gzipped) and runs almost twice as fast as React and Angular.

Similar to view frameworks like Vue and React, Mithril also relies on components and interacts with the virtual DOM. However, it also has some built-in utility modules you won’t find in React, such as out-of-the-box XHR and routing.

Mithril has a relatively flat learning curve. You can get started learning with the Mithril team’s 10-minute learning guide (right on the homepage). Due to its simplicity, Mithril might not be the best solution for a complex project, but it provides you with everything you need to create a simple application.

7. Aurelia

Aurelia focuses on web standards, uses convention over configuration, and comes with minimal framework intrusion. It’s a unique JavaScript framework, as it lets you build UI components using vanilla JavaScript or TypeScript. Aurelia components are, in fact, simple JS/TS classes with corresponding HTML templates. The syntax is quite straightforward, here’s a simple example from the docs:

// app.js export class App { welcome = "Welcome to Aurelia"; }

<template> <form> <label for="name-field">What is your name?</label> <input id="name-field" value.bind="name & debounce:500"> <p if.bind="name">${welcome}, ${name}!</p> </template>

As you can see, if you know how to use HTML and JS, you can start creating Aurelia applications without much further learning. Aurelia has a reactive binding system and syncs your UI with the best performance possible. It also has a fairly large ecosystem with developer tools like a CLI, Chrome debugger, and Visual Studio Code plugin.

8. Svelte

The Svelte framework has been created with the intent to solve the JavaScript bloat crisis of the web. Its creators call it the “magical disappearing UI framework”, as it transforms framework code into framework-less vanilla JavaScript. Svelte has its own compiler that converts the app code into client-side JavaScript at build time, instead of interpreting it at runtime as most frameworks do. As a result, the framework code disappears by the time it reaches the user’s browser.

Svelte apps are built of single-file components using the .html extension. You can either create an entire application with Svelte or incrementally add it to an existing code base. It’s also possible to ship standalone Svelte components that work anywhere without any external dependencies. Svelte has a relatively flat learning curve. If you want to experiment with a JavaScript framework that relies on its own compiler, Svelte is worth a closer look.

More JavaScript Frameworks

The frameworks we have discussed in this article are just a small selection of all JavaScript frameworks—the ones we have found the most interesting at this point in time. If you are interested in more options, you can also consider having a look at the following frameworks:

Ember.js

Meteor.js

Knockout

React Material UI

If you want more resources related to React – which is still the no. 1 JavaScript framework – take a look at our collection of the best React development tools or learn how to get started with Facebook’s Create React App, too.

8 Most Interesting JavaScript Frameworks to Learn in 2019 published first on https://deskbysnafu.tumblr.com/

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anupbhagwat7 · 6 years ago

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CRUD Operations using primeng datatable and Material Design

In this post , we are going to use PrimeNG which provides rich set of open source native Angular UI components and Angular Material Design components. Using these two UI libraries , we will built a application to perform CRUD operations. Code for this example can be downloaded from below links - Front End Code - Download Backend Code - Download Step 1: Install primeng https://www.primefaces.org/primeng/#/setup This package provides us lot of inbuilt UI components to design the User interface as per our requirements. We have created CustomPrimengModule which will have all the primeng components dependencies defined in it. We are using these primeng modules by importing CustomPrimengModule in main app module i.e. aap.module.ts file. Step 2: Install Angular material https://material.angular.io/guide/getting-started Angular Material is a UI component library forAngular JS developers by google. Angular Material components help in constructing attractive, consistent, and functional web pages and web applications while adhering to modern web design principles like browser portability, device independence, and graceful degradation. I have created CustomMaterialModule which will have all the material components dependencies defined in it. We are using these primeng modules by importing CustomMaterialModule in main app module i.e. aap.module.ts file. Also we need to make one entry for importing styles for material design theme - @import "../node_modules/@angular/material/prebuilt-themes/deeppurple-amber.css"; Step 3: Define Reactive forms module I have also defined ReactiveFormsModule and AppRoutingModule which are required for creating forms and routing. Step 4: Install App notifications Module https://www.npmjs.com/package/angular-notifier We are also using NotifierModule to show the notifications in application. For this , we need to import NotifierModule in app.module.ts. Also we need to make one entry for importing styles for notifications - @import "~angular-notifier/styles"; Step 5 : Create the components/Services/Models required for application Components: ng g c components/todo --main=app ng g c components/todo-add --main=app ng g c components/todo-edit --main=app Services: ng g s services/todo Model: Create a typescript file Todo.ts Step 6: Write the component to perform CRUD operations src\app\components\todo\todo.component.html - This is the view part which displays primeng data table providing features for sorting, pagination,inline row editing, Delete, Add row etc. List of Todo Tasks {{col.header}} {{todo.name}} {{todo.desc}} {{todo.status}} There are {{todos?.length}} todo tasks src\app\components\todo\todo.component.ts - This is a typescript file which has implementation for CRUD operations on primeng datatable. It uses TodoService to perform CRUD operations on data using REST webservice - import { Component, OnInit } from '@angular/core'; import { TodoService } from 'src/app/services/todo.service'; import { Router } from '@angular/router'; import { map, catchError, tap, retry } from 'rxjs/operators'; import { NotifierService } from 'angular-notifier'; import { Todo } from 'src/app/domain/Todo'; import { SelectItem } from 'primeng/primeng'; @Component({ selector: 'todo-list', templateUrl: './todo.component.html', styleUrls: }) export class TodoComponent implements OnInit { cols: any; todos: Todo; displayedColumns: string = ; displayTodoList = true; displayTodoAdd = false; displayTodoEdit = false; constructor(private todoService: TodoService, private router: Router, private notifier: NotifierService) { } ngOnInit() { this.displayTodoList = true; this.displayTodoAdd = false; this.displayTodoEdit = false; console.log("From Init = " + this.displayTodoList + " " + this.displayTodoAdd); this.getTodoList().subscribe((data) => { this.todos = data }); this.cols = ; this.statusValues = ; } // To Get List Of Todos getTodoList() { return this.todoService.getTodoList(); } // To Get Todo getTodo(todoId) { return this.todoService.getTodo(todoId); } // To Edit Todo editTodo(todoId) { this.displayTodoList = false; this.displayTodoEdit = true; this.router.navigate(); } //Delete Todo deleteTodo(todoId) { console.log("Delete id" + todoId); this.todoService.deleteTodo(todoId).subscribe((data) => { console.log("success"); this.notifier.notify("success", "Task deleted successfully!!"); }); this.ngOnInit(); this.router.navigate(); } //add Todo addTodo() { console.log("Before = " + this.displayTodoList + " " + this.displayTodoAdd); this.displayTodoList = false; this.displayTodoAdd = true; console.log("After =" + this.displayTodoList + " " + this.displayTodoAdd); } hideTodoAdd(event) { console.log("Event emiited " + event); this.displayTodoList = true; this.displayTodoAdd = event; } clonedTodos: { : Todo; } = {}; statusValues: SelectItem; onRowEditInit(todo: Todo) { this.clonedTodos = { ...todo }; } onRowEditSave(todo: Todo) { this.todoService.updateTodo(todo.id, todo).subscribe((data) => { console.log("success"); this.notifier.notify("success", "Task updated successfully!!"); }); } onRowEditCancel(todo: Todo, index: number) { this.todos = this.clonedTodos; delete this.clonedTodos; } } Step 7: Service Layer - We have injected TodoService through constructor and used it to perform CRUD operations .This service has GET,POST,PUT,DELETE calls to REST endpoints . src\app\services\todo.service.ts import { Injectable } from '@angular/core'; import { HttpClient, HttpHeaders } from '@angular/common/http'; import { Observable, of, throwError } from 'rxjs'; import { map, catchError, tap, retry } from 'rxjs/operators'; import { Todo } from './../domain/Todo'; @Injectable({ providedIn: 'root' }) export class TodoService { endpoint = 'http://localhost:8081/api'; constructor(private http: HttpClient) { } // Http Options httpOptions = { headers: new HttpHeaders({ 'Content-Type': 'application/json' }) } // To Get List Of Todos getTodoList(): Observable { return this.http.get(this.endpoint + '/todos') .pipe( retry(1), catchError(this.handleError) ); } // HttpClient API get() method => Fetch Todo getTodo(id): Observable { return this.http.get(this.endpoint + '/todos/' + id) .pipe( retry(1), catchError(this.handleError) ) } // HttpClient API post() method => Create Todo createTodo(todo): Observable { return this.http.post(this.endpoint + '/todo', JSON.stringify(todo), this.httpOptions) .pipe( retry(1), catchError(this.handleError) ) } // HttpClient API put() method => Update Todo updateTodo(id, todo): Observable { return this.http.put(this.endpoint + '/todo' , JSON.stringify(todo), this.httpOptions) .pipe( retry(1), catchError(this.handleError) ) } // HttpClient API delete() method => Delete Todo deleteTodo(id):Observable { console.log("Delete id "+ id); return this.http.delete(this.endpoint+ '/todo/' + id); } // Error handling handleError(error) { let errorMessage = ''; if (error.error instanceof ErrorEvent) { // Get client-side error errorMessage = error.error.message; } else { // Get server-side error errorMessage = `Error Code: ${error.status}\nMessage: ${error.message}`; } window.alert(errorMessage); return throwError(errorMessage); } } Step 8: Domain Layer - It contains model to hold the todo tasks data. export interface Todo { id?; name?; desc?; status?; } Step 9: Now we are ready to run the project - ng serve Step 10: Screenshots - Main page with data Grid

Add Task screen

Inline Task Editing screen

Deleting task -

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isearchgoood · 5 years ago

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March 10, 2020 at 10:00PM - The Ultimate Learn to Code 2017 Bundle (95% discount) Ashraf

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isearchgoood · 5 years ago

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February 15, 2020 at 10:00PM - The Ultimate Learn to Code 2017 Bundle (95% discount) Ashraf

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isearchgoood · 5 years ago

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January 03, 2020 at 10:00PM - The Ultimate Learn to Code 2017 Bundle (95% discount) Ashraf

Access 174 lectures & 20 hours of content 24/7

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Access web services w/ the xmlHTTPRequest() Object

Discover JSON notation & parsing JSON content

Access 76 lectures & 5.5 hours of content 24/7

Explore some of Python’s many libraries for everything from games & graphics to complex mathematics

Study & modify code on your own to cement each topic

Familiarize yourself w/ Python syntax & real problem solving w/ Python

Complete a comprehensive project that integrates a number of different skills that are a part of core Python

Access 62 lectures & 9 hours of content 24/7

Create a project, compile, & execute your first Java program

Learn useful shortcuts that will cut down on your programming time

Understand variables, operators, conditions, arrays, loops, & more

Take a deep dive into Object Oriented Programming

Discuss Lambda Expressions & generic types

Access 57 lectures & 4.5 hours of content 24/7

Get an introduction to the basics of HTML5 & CSS3

Learn new multimedia updates in the newest versions of HTML & CSS

Work w/ HTML5 new forms elements & the canvas tag

Build a complete, professional looking webpage using HTML5 & CSS3 techniques

Access 156 lectures & 7 hours of content 24/7

Master the core Angular 2 concepts & how to use them in building real-world apps

Understand & resolve common Angular 2 errors

Build single page applications (SPA)

Learn ways to write cleaner, more maintainable code, & build reusable components

Use Reactive Extensions & Observables to handle asynchrony

Connect to backend services & APIs

Access 48 lectures & 5.5 hours of content 24/7

Learn how to install Xamarin for free

Explore basic C# programming

Create basic apps w/ code sharing tasks, hints & tips

Build complex apps like a magnet detector & music player

Access 104 lectures & 7.5 hours of content 24/7

Understand Xcode 8, iOS 10, Interface Builder, Simulator, & project types

Get a full guide to creating full featured apps in Objective-C

Create over 20 real iOS 10 apps in both Xcode 8 & Objective-C

Discover how to build for universal device & screen size support

Earn ad revenue & incorporate in-app purchases to get paid on your apps

Learn Core Data & camera support applications

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Get a firm grasp of SQL programming fundamentals

Learn about ASP.NET, IIS, & Visual Studio

Create & change tables using SQL

Make SQL Server work w/ ASP.NET

Join tables seamlessly

Access 67 lectures & 10.5 hours of content 24/7

Add dynamic features to a website using JavaScript & jQuery

Transfer information between web pages using JSON

Layout websites more efficiently w/ CSS & HTML

Power the back-end of a website w/ C#

Work w/ data more efficiently using SQL Lite

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isearchgoood · 5 years ago

Text

January 02, 2020 at 10:00PM - 2018 Essential JavaScript Coding Bundle (96% discount) Ashraf