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Today in Top Angular News – Tuesday, October 16

Today in Top Angular News – Tuesday, October 16

Today’s topics include ATS, frontend, javascript, webdev, reactjs, Angular, angularjs, typescript, angular6, angular7, bootstrap, css3, html5, Refactoring, webdevelopment, and programming. Special thanks to contributors 726514847387360, Vamsi Vempati, by Rehmaanali, rehmaanalis, Christian, NG_Tutorial, uncle_dallas, @NetanelBasal, Netanel Basal, and nioperas06.


Angular Material 7 and CDK News and Updates – The InfoGrid

Since I last covered news on Angular 7, there have been new features added to both Material 7 and CDK. To use this feature, simply import the MatRippleModule from angular material:

And then, add the matRipple directive to the element you want to add the ripple effect feedback:

You can learn more about this feature here and find a demo here. Text Field package is part of Angular CDK and provides a set of utilities for both text and text area inputs. To use this feature, you just need to import TextFieldModule from CDK:

And then, add the cdkAutofill directive to your input control, passing the method to be triggered. To use this feature, simply import the TextFieldModule from CDK:

And then add the directive to your text area input control:

You can learn more about this feature here. 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


APP_INITIALIZER – Tapping into Initialization Process in Angular – The InfoGrid

That’s what APP_INITIALIZER allows you to do, provide a function that will be executed during app initialization stage. In this demo, we will look at loading our configurations from the previous post to our angular application. So, our service is going to need one method for getting configurations:

And one property for holding our configurations. The function will accept our config service above, which we shall inject when providing APP_INITIALIZER. Next, let’s add our config service and provide APP_INITIALIZER to our list of providers in the App Module. Continue reading


Random Password Generator With AngularJS

  • Now lets jump into the main part of the password generator app.

We will set 4 option in which it will generate password with

– Uppercase Letter

– Lowercase Letter

– Symbol

– Number

To create a Random Password Generator we will be using the AngularJS and the Bootstrap(optional) for design purpose. And if you are using the package manager(npm) you can download through a command in terminal:

Now let’s first create our random password generator form for taking parameters from the user. Then an input field that will give the generated password and on last a submit button which will generate the password

As above we create a file named , so let’s create our app by giving any specific name for the angular application and its controller. We will see stepwise, First of all, we will set our angular application

Now let’s begin with the functionality part in which that it can generate a password with the given size and rules. 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


How To Build A News Application With Angular 6 And Material Design

In this article, we’re going to build a news application using Angular 6 and Google’s material design in combination, which will help you to make your future applications with Angular look great in web browsers and mobile devices. In this tutorial, we’re going to build a news application using two of the most powerful and popular resources out there, Angular 6 and material design. You’ll learn how to incorporate Google’s material design components into Angular application templates to change and style your application in a professional way. Before we get started building the app, let’s quickly review the resources we’re going to use, Angular and material design, and see why we’ve paired them to build this application? It is recommended to include the Angular CDK any time you want to link Google’s material design to an Angular application. Continue reading


Components, Router Outlet, Menus And Button Click Event In Angular 6 – Part Two

In this second part of my Angular 6 article series, we are going to learn how to create components, display a component using router outlet, show a menu list on mouseover, and load a component on a button click event. Now, click on the ASP.NET MVC menu and you will get the  output as:

PART 2  – Show a menu list on mouse over and redirect to components on menu click As we have header.component.html, I am going to create a dropdown list which contains menus. You will get the result as: Now, click on the C# menu and you will get an output as – Now, I am creating one component, i.e., Home. In the home.component.ts file, write the function for onclick event which will navigate to another component using a router: After that, create an object of the router into a constructor. In this article, you learned how to create components, display a component using router outlet, show a menu list on mouseover, and load component on button click event. Continue reading


Dynamic Translations in Angular

Another point is that an Angular app can benefit from getting the translations from an external API, as this will allow for actually change the translations in the app without needing to redeploy the Angular app. In this part, we are gonna look at how to add translations to a todo app on my Github using Angular, ngx-translate and a NodeJS API for serving the translations. We are first gonna add two language files to the Node server in the folder assets/i18n called   and  :

In these files you put your translations for your app, like these English translations for the todo app:

The translations are served on the Node server with:

This will expose everything in the assets folder as static content which can be fetched from eg. In   we set up the app to fetch the translations from the Node server:

The   provide us with the   which we are gonna use to initialize the translations upon startup:

This will add the languages, set English as the default language and try to set the browser language if that is available. In this post, we saw how to overcome shortcomings of the built-in method of handling translations in an Angular app by using ngx-translate to enable dynamic translation in an Angular app, enabling you to change the translations at runtime in a todo app. 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

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