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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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Conducted a two-day Angular workshop for Engineering students from Rural India
If you wish to change a country, start with villages and rural parts. India is a land of talented young minds, and all of them could not be found on Twitter or in the big cities. So, to teach and put them on the right path, one has to travel to the remotest part of […]
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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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Make all properties optional using Partial in TypeScript
The utility type Partial<Type> makes all properties of a type optional. Using a scenario, let us try to understand Partial<T> in TypeScript. So, you have a type called Product, that is created as below: export interface Product { Id: string; Title: string; Price: number; inStock: boolean; Quantity: number; } And there is a function to update the price of a product as shown […]
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Video – Master JavaScript ‘this’ in 30 Mins
Do you know, there are four ways to calculate the value of ‘this’ inside a JavaScript function? Some pointers about ‘this’ Every function has it’s own ‘this’ An arrow function does not have it’s own ‘this’ The value of ‘this’ depends on, how that function is called. The value of ‘this does not depend on […]
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JavaScript function is also a constructor?
JavaScript function is also a “constructor.” You must have heard it many times, haven’t you? Well, that is a wrong way of interpreting the JavaScript function; even though you can create an object using a function, it does not mean you can call it a constructor. Let us discuss it: There are four ways to […]
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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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Union and Intersection of types in TypeScript
Do you know, TypeScript allows union and Intersection of types? Why you need that? Let us assume you need to create a function that checks whether the passed value is boolean true and returns true, otherwise returns null. That function may look like below, function trueOrNull(foo: any): any { if (foo === true) { return true; } return undefined; } console.log(trueOrNull(88)); // null As you see, the […]
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Dhananjay Kumar 