Angular 13 is the latest version of the Angular framework, released on May 25, 2021. Some of the new features and improvements in Angular 13 include:
Improved debugging experience: Angular 13 includes a new debugging experience that allows you to inspect the current state of your application at runtime, including the component tree, the current route, and the current state of the store.
Improved type checking: Angular 13 introduces a new type-checking system that can detect and report more issues at compile-time, including issues with type inference, type widening, and type casting.
New forms features: Angular 13 includes a new FormArray.updateValueAndValidity() method, which allows you to update the value and validity of a FormArray and its children in a single call. It also includes a new FormControl.updateValueAndValidity() method, which allows you to update the value and validity of a FormControl in a single call.
Improved accessibility: Angular 13 includes a new focus-trap-unregister directive, which allows you to unregister a focus trap from a DOM element. It also includes a new focus-trap-register directive, which allows you to register a focus trap on a DOM element.
New router features: Angular 13 introduces a new runGuardsAndResolvers option for the router.navigate() method, which allows you to specify whether guards and resolvers should be run when navigating to a new route. It also includes a new resolveData option for the router.navigate() method, which allows you to specify the data that should be resolved when navigating to a new route.
Improved internationalization (i18n): Angular 13 includes a new $localize function, which allows you to extract messages from your code and mark them for translation. It also includes a new $localize pipe, which allows you to translate messages in your templates.
These are just a few of the new features and improvements in Angular 13. For more information, you can refer to the Angular 13 release notes (https://next.angular.io/release-notes/13.0.0) or the official Angular documentation (https://angular.io/docs).
Angular 13 Debugging Experience
In Angular 13, the debugging experience has been improved to allow you to inspect the current state of your application at runtime. This includes the component tree, the current route, and the current state of the store.
To use the debugging experience, you can open the developer console in your browser and use the ng.getComponent() function to get information about a specific component in your application. For example, to get information about the root component of your application, you can use the following command:
ng.getComponent(ng.probe(document).children[0].componentInstance)
This will return an object with information about the root component, including its inputs, outputs, and dependencies.
You can also use the ng.getState() function to get the current state of the store in your application. This can be useful for debugging issues with data management or state management.
For example, to get the current state of the store, you can use the following command:
ng.getState()
This will return an object with the current state of the store.
To learn more about the debugging experience in Angular 13, you can refer to the official Angular documentation (https://angular.io/docs) or try out the debugging tools in your own application.
Angular 13 Improved type checking
In Angular 13, the type-checking system has been improved to detect and report more issues at compile-time. This includes issues with type inference, type widening, and type casting.
Type inference is the process of deducing the types of variables and expressions based on the context in which they are used. Angular 13 includes a new type-inference system that can detect and report more issues with type inference, such as using variables or expressions with the wrong type.
Type widening is the process of converting a variable or expression to a more general type to avoid type errors. Angular 13 includes a new type-widening system that can detect and report more issues with type widening, such as using variables or expressions with the wrong type.
Type casting is the process of converting a variable or expression from one type to another. Angular 13 includes a new type-casting system that can detect and report more issues with type casting, such as using variables or expressions with the wrong type.
To use the improved type-checking system in Angular 13, you can enable type checking in your project by setting the strict flag in the tsconfig.json file to true. This will enable the type-checking system to detect and report more issues with your code.
For example, to enable type checking in your project, you can set the strict flag in the tsconfig.json file like this:
{
"compilerOptions": {
"strict": true
}
}
Angular 13 New router features
In Angular 13, the router has been improved to include new features that allow you to navigate to a new route more easily and with more control.
One of the new router features in Angular 13 is the runGuardsAndResolvers option for the router.navigate() method. This option allows you to specify whether guards and resolvers should be run when navigating to a new route.
Guards are used to protect routes from unauthorized access, while resolvers are used to pre-fetch data for a route. By setting the runGuardsAndResolvers option to true, you can ensure that guards and resolvers are run when navigating to a new route, which can be useful for maintaining the security and performance of your application.
For example, to navigate to a new route and run guards and resolvers, you can use the following code:
this.router.navigate(["/new-route"], { runGuardsAndResolvers: true });
Another new router feature in Angular 13 is the resolveData option for the router.navigate() method. This option allows you to specify the data that should be resolved when navigating to a new route.
Resolved data is data that is pre-fetched by a resolver and made available to a route component when it is activated. By specifying the data you want to resolve when navigating to a new route, you can ensure that the data is available to the route component when it is activated, which can improve the performance and user experience of your application.
For example, to navigate to a new route and resolve data, you can use the following code:
this.router.navigate(["/new-route"], { resolveData: { foo: "bar" } });
These are just a few examples of the new router features in Angular 13. For more information, you can refer to the
Angular 13 New forms features
In Angular 13, the forms module has been improved to include new features that allow you to update the value and validity of a FormArray or a FormControl in a single call.
One of the new forms features in Angular 13 is the FormArray.updateValueAndValidity() method, which allows you to update the value and validity of a FormArray and its children in a single call.
For example, to update the value and validity of a FormArray and its children, you can use the following code:
formArray.updateValueAndValidity();
Another new forms feature in Angular 13 is the FormControl.updateValueAndValidity() method, which allows you to update the value and validity of a FormControl in a single call.
For example, to update the value and validity of a FormControl, you can use the following code:
formControl.updateValueAndValidity();
These new forms features can be useful for updating the value and validity of a FormArray or FormControl in response to user input or other events in your application.
Angular 13 Improved accessibility
In Angular 13, the accessibility of the framework has been improved to include new directives that allow you to manage focus traps more easily.
A focus trap is a mechanism that prevents users from interacting with elements outside of a specific area of the page, such as a modal or a dialog. Focus traps are often used to improve the usability of web applications for users with disabilities, such as users who rely on keyboard navigation.
In Angular 13, two new directives have been added to help manage focus traps: the focus-trap-unregister directive and the focus-trap-register directive.
The focus-trap-unregister directive allows you to unregister a focus trap from a DOM element. This can be useful for removing a focus trap when it is no longer needed, such as when a modal or dialog is closed.
For example, to unregister a focus trap from a DOM element, you can use the following code:
The focus-trap-register directive allows you to register a focus trap on a DOM element. This can be useful for adding a focus trap to an element that was not originally designed to be a focus trap, such as a custom component.
For example, to register a focus trap on a DOM element, you can use the following code:
These new directives can be useful for improving the accessibility of your Angular application by allowing you to manage focus traps more easily.
Angular 13 Improved internationalization (i18n)
In Angular 13, the internationalization (i18n) features of the framework have been improved to include new tools that allow you to extract messages from your code and mark them for translation, and to translate messages in your templates.
One of the new i18n features in Angular 13 is the $localize function, which allows you to extract messages from your code and mark them for translation. The $localize function works by replacing placeholder strings in your code with placeholders that can be translated by the i18n tooling.
For example, to extract and mark a message for translation using the $localize function, you can use the following code:
import { $localize } from "@angular/localize";
const message = $localize`:@@example-message:Example message`;
Another new i18n feature in Angular 13 is the $localize pipe, which allows you to translate messages in your templates. The $localize pipe works by replacing placeholders in your templates with the translated version of the message.
For example, to translate a message in a template using the $localize pipe, you can use the following code:
{{ '@@example-message' | $localize }}
These new i18n features can be useful for improving the internationalization of your Angular application by allowing you to extract and translate messages more easily
