Category: Angular
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How to use conditions in Angular Template using
There are various ways you can apply conditions on Angular Template. Usually, you apply conditions to show a particular value or render a specific element based on a condition. In this post, let us see, the simplest way of achieving the conditions in Angular Template using the <ng-container> and <ng-template>. To start with consider data,…
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Why use exportAs Property in Angular
Have you used exportAs property of a directive? It could be instrumental in working with public methods of a directive. Let us say; you have created a custom directive to change the background colour of the host element on the mouse hover as below, The above custom directive changes the background colour of the host…
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When to use viewProviders in Angular – Simplified
I have often seen developers are confused about viewProviders property of the @Componnet decorator. This post explains to you about the viewProviders option. The viewProviders defines the set of injectable objects that are visible to its view, DOM children. They are not visible to the content children. At the component level, you can provide a service in two ways: Using the providers array Using the viewProviders array.…
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How to use useClass with Tree Shakable Services in Angular
Recently, I was asked that how can we use providers such as useClass inside a Tree Shakable service? By default, Angular services are tree shakable, which means if the application does not use them, they are not part of the final bundle. So, if you create a service using CLI as, ng g s Log…
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Do Angular useExisting providers create a new object of service?
Short answer is NO, the useExisting provider use object created by other tokens. Read on, To learn more about such concepts, join a free webinar on Saturday, 20 June 4 PM IST. RSVP here: https://www.meetup.com/Geek97/events/271292371/ In Angular, providers determine how an object of a particular token gets created. That means whether Angular creates a new…
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How to use different syntax for Angular Interpolation
How to use different syntax for Angular Interpolation
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How to use Interceptor in Angular
Interceptors are used to intercepts HTTP requests and responses from the application. You can handle them or transform them before passing it on. For example, you can use an interceptor to add authorization token before passing the HTTP request or cache the HTTP response. Some of the usages of interceptors are as follows, Caching of…
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When to use the subscribe method or async pipe in Angular?
This post explains when to use subscribe method or async pipe in working with observable data in an Angular application
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Simplest way to share data between two unrelated Components in Angular
In Angular, it is essential to know how components communicate with each other. If you use a component inside another component, they create a parent child relationship. In such a scenario, parent and child components communicate to each other in following ways: @Input() @Output() Temp Ref Variable ViewChild and ContentChild You can learn in detail…
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Simplifying Angular CLI for beginners
So you want to write your first Angular application, however setting up even a ‘Hello World’ Angular application is not easy. It requires many steps such as: Setting up a TypeScript compiler, if you choose to use TypeScript Configuration of Webpack or other module loader Setting up local web development server Installing and configuring dependencies…
Dhananjay Kumar 