Angular Jobs, Resources, Developers, & Employers. Are Popular Job Platforms Not Enough? Do You Need More Qualified Applicants Now? Get More Qualified Candidates Applying to Your Angular Job. Post a Job to Supercharge Your Search for an Angular Developer! Also serving React and Vue!

Today in Top Angular News – Wednesday, October 10

Today in Top Angular News – Wednesday, October 10

Today’s topics include AngularJS, AutoTweet, node, nodejs, vuejs, reactjs, 100DaysOfCode, javascript, learning, typescript, ITNEXT, Docker, design, coding, webdev, and html. Special thanks to contributors 489353998114308, Suguru Inatomi, amandeepmittal, @NetanelBasal, Netanel Basal, Christian, @ohansemmanuel, Ohans Emmanuel, @manuka.14, Chamath Manuka, @dalenguyen, Dale Nguyen, debug_mode, Ellova_BV, TalentoIT, Anil Singh, @Mybridge, Mybridge, pallavipaddu2, and Oleg Varaksin.


Angular Flex-Layout: Flexbox and Grid Layout for Angular Component

It’s a component to display a simple card for the demonstration of Flexbox selector: 'app-card',
template: `Card: {{name}}/`,
styles: [`
:host {
display: block;
padding: 32px;
border: 1px solid black;
border-radius: 8px;
}
`]
})
export class CardComponent {}Making a Flexbox layout
We’re ready to make a component with Flexbox layouts! With Angular Flex-Layout, the same layout will be implemented as following template;
fxLayout="column" fxLayoutGap="32px"
app-card/app-card
app-card/app-card
app-card/app-card
/As you can see, there is a Flexbox container with fxLayout="column" and configuration of it. cardListItem {
flex: 0 1 calc(33.3% – 32px);
}
/style class="cardList"
ng-container *ngFor="let _ of [1,2,3,4,5,6]"
app-card class="cardListItem"/app-card
/ng-container
/And rewritten template with Angular Flex-Layout is the below;

fxLayout="row wrap" fxLayoutGap="32px" fxLayoutAlign="flex-start"
ng-container *ngFor="let _ of [1,2,3,4,5,6]"
app-card fxFlex="0 1 calc(33.3% – 32px)"/app-card
/ng-container
/It’s very cool!
fxLayout="row wrap"
fxLayout.lt-sm="column"
fxLayoutGap="32px"
*ngFor="let _ of [1,2,3,4,5,6]" app-card
fxFlex="0 1 calc(33.3% – 32px)"
fxFlex.lt-md="0 1 calc(50% – 32px)"
fxFlex.lt-sm="100%"
/app-card/ng-container/Each child element has new fxFlex.lt-md and fxFlex.lt-sm directives to configure the card size for each viewport size. cardInner {
display: grid;
grid-template-areas: "header header" "side content" "footer footer";
grid-template-rows: auto auto auto;
grid-row-gap: 16px;
grid-column-gap: 16px;
}
/style class="cardInner"
[style.grid-area]="'header'"
Header
/ [style.grid-area]="'side'"
Side
/ [style.grid-area]="'content'"
Content
/ [style.grid-area]="'footer'"
Footer
/
/To use Grid directives, any additional setup isn’t needed. Continue reading


Smart Tables with Angular – codeburst

The ng2-smart-table is a library that is available to us as an npm package and pre-defined components and directives for sorting, searching, filtering and displaying data in the form of a table. However, Angular leverages in this case, its HTTP Client which allows us to fetch data from the remote API, in our case the JSON server data. First, : this file works as an schema design (if you think interms of database) or an interface that let our Angular application know the type of data it is going to receive from the remote API. If you get a similar result like below, depending on the amount of your data, this means you successfully created the Table Service and fetched the data from a remote API using . The is the same object that we defined in the The source is comping from Table service where we fetch data and make it available to our component using . Continue reading


Accessibility Made Easy with Angular CDK – Netanel Basal

We’ll create a searchable list and add the option to choose items using the keyboard. The ListKeyManager Class
ListKeyManager manages the active options in an item list based on keyboard interactions. Under the hood, active option will be managed based on the user’s keyboard navigation. Each managed item should implement the Highlightable interface:
As the user navigates, Angular calls the setActiveStyles() method on the newly active option and setInActiveStyles() on the previously option. Each managed item must implement the FocusableOption interface:
As the user navigates, Angular calls the focus() method on the newly active option. Continue reading


Refactoring Angular Apps – How To Keep Angular Apps Clean

To understand how to refactor Angular Apps we are gonna look at two levels of abstraction; one is the architecture of the app (what belong to what file) and the other is how to keep the code clean inside the files. To understand how we are gonna transform a legacy application into a clean architecture we can follow the below flow:

By looking at the flow we see that the first step is to make our app distinguish between smart and dumb component. To make the code obey the three-second rule we should focus on self-explaining method names and variables, a consistent level of abstraction and separating query and command. On the architecture level, we saw that we should keep components stateless and dumb and instead use services to contain logic as your application grows. On the code level we saw how to make the code obey the three-second rule by making the method and variable self-describing, keeping methods small and on a consistent level of abstraction and ensuring a clear control flow by separate side-effect free query operations from commands, which modify or create data. Continue reading


Role Based Authorization in Angular – Route Guards – The InfoGrid

In this post, we shall use JSON Web Tokens (JWTs), which will contain the user role of the current user. The JWT token, shall have a user role added to it on the server, after signing in together with other user details such as email, username, full name etc. This way, each route shall be aware of the roles it will allow access to it and you can just check the user role against allowed roles:

So, in the case of author route, we shall allow users with author and admin role. It will accept allowed roles string array and check whether current user role is among the roles that are allowed:

Next, add the service to the list of providers in the app module:

Next, let’s add a route guard to our app. So, inside both two methods, we need to first get the allowed roles for that route:

Then, check if the user is authorized to access the route:

So, I our canActivate method will look like this:

Now, let’s add the guard to our parent route:

And that’s it, we have a role-based authorization for our angular application. Continue reading


How to Eliminate React Performance Issues – Ohans Emmanuel – Medium

The green flash shows the components in the app that are re-rendered by React under the hood. If you remember from React 101, whenever the props or state of a component changes, a re-render is triggered. An easy way to implement a pure component is to use React.PureComponent as opposed to the default React.Component
Using React.PureComponent as opposed to React.ComponentTo illustrate this specific use case in Cardie, let’s break down the render elements of the Profession component into smaller components. What’s interesting is that upon a change to the description prop, every child component of Profession is also re-rendered. Just the overall container, and the profession flashes.In a larger application, you may find immense performance optimisations by just making certain components pure components. Continue reading


Simple Introduction to Angular 6 – Chamath Manuka – Medium

  • Component will be the building block of an Angular 6 application.

Simple Introduction to Angular 6
Background of Angular and its Releases
The first version of Angular was released in Oct 2010 by Google and it was JavaScript-based, open-source front-end web application framework. Navigate to wherever you want to create your project and put,
ng new first-app
Running this command will create a new folder where you navigated in order to create new Angular application named “first-app”. This will take couple of minutes to finish and when finished, navigate into the folder named “first-app” using,
cd first-app
Then to start our Angular application on local development server we can run,
ng serve
This will start the local server and compile the code into JavaScript. But if you have a bigger template file(html file) you should implement it in a different file which is the best practice of developing an Angular applications. Continue reading


Run Your Node Projects with Docker – ITNEXT

So what I did is to put entire project inside a Docker container that uses an older version of Node which is 6. docker run –rm -ti -p 3000:3000 image-name# –rm container will be removed after each run
# -p 3000:3000 you can communicate with the project through port: 3000If there are no errors, you can open your browser and check the you can edit your files inside the docker container by open the second bash. docker exec -ti container-id /bin/bash# Then using vim or nano to edit the filesYou can copy the entire project from the container to your host machine
docker cp container-id:/usr/src/app .2. So basically, I still can edit the project from my current folder from the host and the node commands will be run from the docker container @. @
docker run –name container-name -ti -v -p 3000:3000 node-imageAfter that, you just need to start the container whenever you want to run the project
docker start container-nameMy mind was literally blown away at that moment @. Continue reading


A Unified Platform for Designers and Developers

Indigo.Design is a unified platform for visual design, UX prototyping, code generation, and app development. Our goal with Indigo.Design is to give you the tools and capabilities to drive productivity across all the personas that make up teams charged with delivering amazing experiences to customers. It is comprised of four parts:

Each piece has its own roadmap, based on a couple factors:

For the remainder of 2018, we have aggressive goals for each tool in the tool-chain tailored to the Visual Designer, UX Designer, and Developer. Continue reading


Building A PWA Using Angular 6

Throughout this tutorial, we’ll be using Angular 6 to build a Progressive Web Application, step by step, implementing the core tenets of PWAs using Angular CLI v6. Next, we’ll use the “Audits” panel (Lighthouse) from Chrome DevTools to analyze our web application against the core tenets of PWAs. Our application has 7 failed audits mainly related to Service Workers, Progressive Enhancement, HTTPS and Web App Manifest which are the core aspects of a PWA. One simple example of PE is the use of the HTML tag that informs users of the need to enable JavaScript to run the application in case It’s not enabled:

The fourth failed audit (“Does not redirect HTTP traffic to HTTPS”) is related to HTTPS which is also a core aspect of PWAs (service workers can be only served from secure origins, except for localhost). The three failed audits (“User will not be prompted to Install the Web App”, “Is not configured for a custom Splash Screen” and “Address bar does not match brand colors”) are related to a missing Web App Manifest which is a file in JSON format that provides the name, description, icons and other information required by a PWA. Continue reading


Best practices for a clean and performant Angular application

pipe(
map(value = value.item),
take(1)
);4) Isolate API hacks
Not all APIs are bullet proof — sometimes we need to add some logic in the code to make up for bugs in the APIs. pipe(
map(value = value.item)
);6) Clean up subscriptions
When subscribing to observables, always make sure you unsubscribe from them appropriately by using operators like take, takeUntil, etc. subscribe(item = this.textToDisplay = item);After
Using takeUntil when you want to listen to the changes until another observable emits a value:
private destroyed$ = new Subject();public ngOnInit (): void {
iAmAnObservable
. pipe(
map(value = value.item)
// We want to listen to iAmAnObservable until the component is destroyed,
takeUntil(this. subscribe(item = this.textToDisplay = item);
}public ngOnDestroy (): void {
a private subject like this is a pattern to manage unsubscribing many observables in the component. Continue reading


Register a Service Worker in Angular

To install a service worker you need to kick-start the process by registering it on your page. This tells the browser where your service worker JavaScript file lives. every time a page loads without concern; the browser will figure out if the service worker is already registered or not and handle it accordingly. You can call below

This code checks to see if the service worker API is available, and if it is, the service worker at /

is registered once the page is loaded. Continue reading


Web Development Top 10 Articles for the Past Month (v.Oct 2018)

Web Development Top 10 Articles for the Past Month (v.Oct 2018)
For the past month, we ranked nearly 1,500 Web Development articles to pick the Top 10 stories that can help advance your career (0.7% chance). Tweet of the monthTopics in this list: Web Browser, 10X Developer, Performance, Interview Questions, Algorithms, Homeless Developer, Browser Rendering, Web Components, HTTP headers, Validation Certificates
“Watch” Web Development Monthly Top 10 on Github and get email once a month. This is a competitive list and you’ll find the experience and techniques shared by the Web Development leaders useful. Course of the month:
A) Beginners: The Web Developer Bootcamp: The only course you need to learn web development — HTML, CSS, JS, Node, and More! [92,107 recommends, 4.7/5 stars]
B) The Complete Web Developer in 2018: Zero to Mastery. Continue reading


What is AngularJS good for? – Quora

  • AngularJS is an open-source Front-end JavaScript framework.

Adoption of AngularJS as a viable framework for client-side development is quickly becoming known to the entire web development community.Because AngularJS is built by Google, you can be sure that you’re dealing with efficient and reliable code that will scale with your project. AngularJS is equipped with a lot of featuresIf you’re familiar with projects, like QUnit, Mocha or Jasmine, then you’ll have no trouble learning Angular’s unit-testing API.Angular, similar to Backbone or JavaScript MVC, is a complete solution for rapid front-end development. AngularJS turns this into a simple JavaScript object, as Models, following the MVVM (Model View View-Model) pattern. If you’re familiar with projects, like QUnit, Mocha or Jasmine, then you’ll have no trouble learning Angular’s unit-testing API and Scenario Runner, which guides you through executing your tests in as close to the actual state of your production application as possible.These are the fundamental principles that guide AngularJS to creating an efficient, performance-driven, and maintainable front-end codebase. Continue reading


Promises in AngularJS. Part I. Basics.

To do so, the promise has a method named then, which accepts two functions – success and error function. An example of $http service based on promises:

We can say, a promise represents the future result of an asynchronous operation. Here is an example of promise chaining:

Be aware that either the success or the error callback will be invoked, but never both. Example for MyController -& MyService -& $http:

We have to mention yet that AngularJS’ implementation of promises is a subset of the library Q. Q is the most known implementation of the Promises/A+ specification. It is constructed using the $q service – the AngularJS’ implementation of promises / deferred objects inspired by Q. Continue reading

Did we miss something? Do you have feedback on how we can improve? Contact us.