What are the benefits of privatizing your router?

Question

What are the benefits of privatizing your router?

The Angular 2+ (4) tutorial on routing demonstrates making the router a private member like this:

constructor(
    private router: Router, // <- router is private
    private heroService: HeroService) { }
    ...
) {}

However, it does not explain the reason behind making the router private in this context. This may make testing more challenging, so what could be the rationale for keeping it private? Is it purely a matter of best practice, or could there be security implications if made public?

In addition, how do you test routing to ensure proper navigation under different conditions? The tutorial does not address testing of router/routes at all.

javascript angular typescript angular-router

Answer 1

Answer №1

When you use the keywords private, public, or protected in TypeScript, it automatically creates a class-level field and assigns the constructor parameter to it.

This functionality in TypeScript helps reduce boilerplate code.

Now, instead of writing:

class MyComponent {
  router:Router;

  constructor(
    router: Router, // <- router is private
    private heroService: HeroService) { }
    ...
  ) {
    this.router = router;
  }

  someMethod() {
    this.router...
  }
}

You can simply write:

someMethod() {
  this.router...
}

If there is no specific reason to make a property public or protected, using private is typically the best choice. This approach helps to maintain clean and manageable code.

Answer 2

When you use the keywords private, public, or protected in TypeScript, it automatically creates a class-level field and assigns the constructor parameter to it.

This functionality in TypeScript helps reduce boilerplate code.

Now, instead of writing:

class MyComponent {
  router:Router;

  constructor(
    router: Router, // <- router is private
    private heroService: HeroService) { }
    ...
  ) {
    this.router = router;
  }

  someMethod() {
    this.router...
  }
}

You can simply write:

someMethod() {
  this.router...
}

If there is no specific reason to make a property public or protected, using private is typically the best choice. This approach helps to maintain clean and manageable code.

Answer 3

Answer №2

Encapsulation is a fundamental concept in programming. By making your fields private and functionality public, you enable the client using your class to interact with it based on what it can do, rather than how it achieves those actions.

In TypeScript, there are 3 access levels - public, private, protected. These keywords are specific to TypeScript.

When a variable/function is marked as private, it remains hidden from external classes.

If a variable/function is declared as public, it can be accessed from outside the class.

For a variable/function marked as protected, it is accessible within the class itself and any classes that inherit from it.

Answer 4

Encapsulation is a fundamental concept in programming. By making your fields private and functionality public, you enable the client using your class to interact with it based on what it can do, rather than how it achieves those actions.

In TypeScript, there are 3 access levels - public, private, protected. These keywords are specific to TypeScript.

When a variable/function is marked as private, it remains hidden from external classes.

If a variable/function is declared as public, it can be accessed from outside the class.

For a variable/function marked as protected, it is accessible within the class itself and any classes that inherit from it.

Answer 5

Answer №3

In the realm of object-oriented programming, the issue raised in this specific scenario is not unique to routers... it pertains to OOP as a whole. The fundamental question that arises is always, "Should this element be accessed by external code as part of the public interface of this class?" Will there ever be a need for router to be exposed and utilized elsewhere, such as ctrl.router? If the answer is no, then best practice dictates keeping it private. By limiting the externally accessible parts of the public interface to only essential components, it becomes easier to discern dependencies and streamline potential refactoring processes down the line, given that there are no external ties binding it.

Answer 6

In the realm of object-oriented programming, the issue raised in this specific scenario is not unique to routers... it pertains to OOP as a whole. The fundamental question that arises is always, "Should this element be accessed by external code as part of the public interface of this class?" Will there ever be a need for router to be exposed and utilized elsewhere, such as ctrl.router? If the answer is no, then best practice dictates keeping it private. By limiting the externally accessible parts of the public interface to only essential components, it becomes easier to discern dependencies and streamline potential refactoring processes down the line, given that there are no external ties binding it.

What are the benefits of privatizing your router?

Answer №1

Answer №2

Answer №3

Similar questions

Creating seamless shading effects using three.js with Blender integration

What is the best way to eliminate all occurrences of a specific element within an array?

What is the best way to transfer information from a component to the routing module in Angular version 16?

Vue.js: EventBus.$on is not properly transmitting the received value

Unable to create a loop within the constructor to assign API values

Removing an element from an array of objects in Javascript

`How can you effectively simulate class modules in Jest?`

Struggling to understand JSON in joint.js?

Is it true that in the Angular4 Webpack Starter, tsconfig.webpack.json is specifically designed for webpack, whereas tsconfig.json is intended for all other purposes

Sorting by the date column in Ngx-Datatable is malfunctioning

Interrupting the Recursive Function Execution

Unable to get SweetAlert to confirm delete action in Laravel 9

Rendering only anchor tags in a v-html element while excluding others and displaying them as strings can be achieved by implementing specific filtering logic

Is it possible for me to send the templateUrl to the directive in AngularJS?

What is the method for adding/removing the 'hidden' attribute within a <p hidden> element

Unable to conceal element if it is devoid of content

The communication between Firefox and the server appears to be interrupted as it stops receiving responses after a certain number of HTTP requests. In this specific

How to eliminate blinking in Ajax refresh upon successful completion

Loop through the JSON object at a depth of three levels

What is the best way to maintain an active listGroup even after reloading the page?