Category: Angular
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Making Angular Service – Always Singleton
By default, Angular Services are Singleton. When you create a service using the CLI command, ng g s App Angular creates a service named AppService. The above service is Singleton Tree-shakeable Available throughout the application Singleton means Angular creates only one object of the AppService, regardless of how many places you use it. However, if […]
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Angular 14 – Introducing Standalone Components
Angular 14 introduces Standalone Components. A component that is not part of ngModule.
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The simplest way to disable console.log for Production build in Angular?
I work with different developers, and most of them rely on console.log () or other console methods for development. They use the console to print various values to debug while doing the development. I call this approach console-driven development. Cool name, right? These console functions become overwhelming in production as users can see many things […]
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Video – Angular Interview : is Angular Service Singleton ?
One of the most popular Angular interview questions is, whether a service is singleton? By default, when you create a service using the below CLI command, ng g s app AppService is singleton, however it can be re-provided to create more objects of it. Say, you again re provide AppService in one of the components, […]
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Change Detection in Angular
Change Detection is the backbone of the Angular framework, and each component has its own change detector. This article explains change detection strategies and optimizations to help you write highly performant Angular applications. Angular can detect when data changes in the component, and can re-render the view to display the updated data. Angular makes sure […]
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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 […]
Dhananjay Kumar 