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Today in Top Angular News – Sunday, September 16

Today in Top Angular News – Sunday, September 16

Today’s topics include experience, ux, AngularJS, angular6, Mouth, and Sore. Special thanks to contributors Adi_b2, @maorfrank, Maor Frankel, @NetanelBasal, Netanel Basal, mockuptiger, @kashyap.mukkamala, Kashyap Mukkamala, @damian_t, Damian, s2engineers, @adamaso, Angela Damaso, +Era Balliu, Era Balliu, BanishCheilitis, and @mibzman, Sam Borick.


What is new in Angular 6? – Quora

Transforming a component to a custom element provides an easy path to creating dynamic HTML content in your Angular app. Many Angular Material2 components are built on top CDK Toolkit which is the Design agnostic toolkit. Now validators checks before adding line boundaries that mean Validators will work as expected with or without line boundaries

Added multiple validators for array method of FormBuilder – Before Angular 6, there was no way to pass multiple validators to the formBuilder.array method which is allowed now

New optional generic type ElementRef – This optional generic type will help to get hold of the native element of given custom Element as ElementRef Type

Features which are New in Angular CLI 1.7 and Supporting to Angular 6

Schematics Support – Schematics is a workflow technology for the modern web application development which can apply transforms to your project, like create a new component, or updating your code to fix breaking changes in a dependency Or to add a new configuration option or new framework to an existing project. ng update – We have now a command to automatically update the Angular dependencies of our CLI applications. App Budgets is a feature in the Angular CLI which allows you to set thresholds for the size of bundles. Continue reading


Micro Front Ends — Doing it Angular Style Part 1 – Maor Frankel – Medium

No need to say much about the problems of having large code bases and large teams…
The term Micro Front Ends has been thrown around a lot lately, offering a concept similar to Microservices where we can split a monolithic Front End application to micro applications that can be loaded into a single container application running on the users browser. Each application can have its own code base, be managed by a business oriented team which can test and deploy their micro app independently. Standalone mode
Each micro app should be capable of running completely in standalone mode, so each team in charge of a given app should be able to run it independently from other applications. This means each application should be hosted on a separate codebase and be able to run locally on a developer’s computer, and in dev and tests environment
Deployment
It should be possible to deploy each service independently to any environment including production in order to allow freedom for the owner team to work without interfering with other teams, If a bug fix needs to be deployed to production on the weekend no other team should have to be involved. Backwards compatibility
Since we are not going to rewrite our huge code base, we need something we can plugin to our current system and gradually separate parts that can be managed by other teams
Web Components
Finally, Any solution we go for should be aligned as much as possible with the web components concept, even though it is currently just that, a concept, it seems that that is the way the future is heading, and if any solution pop up in the future, aligning ourselves with this will help us adopt future solution. Continue reading


Getting to Know the Angular CDK Drag and Drop Feature

cdkDragHandleSortable Example
Adding the cdk-drop around a set of cdkDrag elements groups the draggables into a reorder-able collection. Sortable exampleThe package exposes the moveItemInArray method which on drop rearrange the items array according to the indexes. Sortable demoTransferring Items between Lists
The cdk-drop component supports transferring dragged items between connected drop zones. If the user is dragging an element within the same container, we perform a sortable action; otherwise, we transform the value from one collection to the other using the built-in transferArrayItem() method. ( note that this method mutates the array )

enterPredicate
The enterPredicate input expects a function that is used to determine whether an item is allowed to be moved into a drop container. Continue reading


Wireframe Software – Mockup Dashboards, Websites and mobile Apps

In the web development and app-making industry, you’ll often hear design terms like sketch, wireframe, mockup, and prototype. The first two — the sketch and the wireframe — belong to low-fidelity representation. The third step, the mockup, gives medium-fidelity representation while the last one, the prototype, provides high-fidelity representation. There are online sketch templates, wireframe diagram, and mockup tools you can use without shelling out a dollar. Continue reading


A comparison of lazy loading components in Angular and React applications

When we start the app with the cli and add some basic styles to the template to load the application, we see output for the lazy loaded routes as shown below:
The main and vendor javascript files are loaded when the page initially loads (and renders the HomeComponent). We will test the same functionality with the production build later.Until now, we have loaded components on demand via route, let us now try to lazy load components on pre-rendered routes via other user interactions. There is no other way in which we can lazy load an Angular component without relying on routes and modules. To load these changes, we would have to set up our settings routes with lazy loading child component as shown below:
Everything seems as expected, we have added the new outlet property indicating where we want the component to be rendered (within the settings html page) and the loadChildren property indicating that it would be lazily loaded. Let us first enable route based lazy loading using react-loadable and then add further logic in our settings page to load the edit component lazily. Continue reading


Turning Off Change Detection for Performance in Ionic

Turning Off Change Detection for Performance in Ionic
Angular’s change detection is usually quite great, but I found a case where it’s performance was terrible on a page that contained a long vertical list of horizontal lists of images (think the soundcloud home page where there are lots of categories of songs each represented by an image). Next step was to turn off change detection on the page by adding this to @component:
changeDetection: this to the constructor:
private cdr: ChangeDetectorRefthen this to change detection i needed to know when there were changes to my view or interaction from the user. In Ionic 4 I can get the scroll by doing the following:
ion-content #contentthen adding the ViewChild for Content;then in my ionViewDidEnter():
const element = await = merge(fromEvent(window, 'touchstart'), fromEvent(element, 'scroll'), = { this.cdr.detectChanges(); });Note: i’ve imported some stuff from rxjs here:
import { fromEvent, interval, merge } from 'rxjs';
import { debounceTime, startWith } from 'rxjs/operators';So what does this magic do? Then the “fromEvent” gets an observable of events whenever the user scrolls in that content. The “touchstart” code gets events whenever the user touches the screen (eg to slide left/right) and the interval operator gives an event every 1 second. Continue reading


Leverage Structural Directives to Create Powerful Components in Angular

In this article, we’ll learn how to create a powerful drop-down component with the help of structural directives. For the selected option:
For each option:
Nothing fancy here, we are just injecting the TemplateRef in both directives so that we can use them later in the parent component. Now let’s get a reference to these directives in the nb-dropdown component and render the templates in the appropriate places. We can use the ngTemplateOutlet directive to embed a view from a prepared TemplateRef and the ngOutletContext input to pass a context to the embedded view ( this is for the let-selected part ). Summary
We saw how we could create a powerful component with the help of structural directives. Continue reading

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