The dynamic team of the popular typescript-based web framework, Angular, has been known for its periodic updates to keep up with changing times and emerging technologies. And, here’s another update that has created a buzz in the technical world. Their latest update, Angular 13, rolled out on 3rd November 2021; is one of their most organized, pre-planned, and game-changing updates so far.
So, what’s new in angular13? Well, this post discusses all the noteworthy add-ons, embellishments, improvements, deletions as well as modifications. Let’s peek through the novel offerings of Angular 13!
Angular 13: Major Add-ons, Enhancements, and Modifications
Ivy View Engine replaces the Legacy View engine
After the Angular team had rolled out multiple updated versions that marked a transitioning phase to the Ivy View Engine, Angular 13 is now 100% Ivy. Angular has completely removed support for the legacy view engine and supports only Ivy. The existing libraries will get migrated to the “partial” compilation mode automatically and the metadata that was earlier needed for the legacy View Engine will be removed. Angular developers should switch from “enableIvy:false” to “compilationMode:partial” to keep up with the update.
This update brings about speedier compilation as well as enhanced productivity to Angular app development. Moreover, the Ivy approach enables developers to write codes dynamically unlike the previous versions, wherein the developers needed a boilerplate for code creation. Using the previous versions, developers are required to inject ComponentFactoryResolver into the constructor for creating components. But, with V13, components can be created without having to create an associated factory using ViewContainerRef.createComponent.
Modifications in the APF (Angular Package Format)
The APF (Angular Package Format) defines the format and the structure of the packages contained within the Angular framework. This approach greatly helps in packaging third-party libraries in the web development environment. Angular 13 comes with a new version of the APF, a modernized and streamlined APF.
Modifications and add-ons
· Older output formats including View Engine-specific metadata, have been eliminated which will minimize the maintenance expenses as well as the complexity of the codebase.
· Libraries created using the updated APF will not need to use ngcc any longer; resulting in a leaner package as well as quicker execution.
· The production of UMD bundles have been removed
· The new APF supports Node package Exports and as such, Angular developers will no longer unknowingly rely on internal APIs that are subject to change.
· It generates ES2020 output and Ivy partial compilation output
· The new APF makes use of the package exports using the sub-path pattern feature from Node.js for displaying multiple available outputs at each entry point.
Form and Router Enhancements
V13 comes with FormControlStatus, a new type for forms which is a union type of all status strings possible concerning form controls. This add-on brings about two more modifications — the type of AbstractControlStatus changes to FormControlStatus and StatusChanges now has Observable<FormControlStatus> instead of Observable<any>.
V13 introduces a host of new functions that manage form validation like addValidators, setValidators, hasValidators, removeValidators, alongside their equivalent async versions — addAsyncValidators, setAsyncValidators, hasAsyncValidators, and removeAsyncValidators.
Now let’s take a look at the router modifications. The earlier Angular versions had an empty string to set the routerLink directive value to zero and undefined; without any means for disabling the link’s navigation. However, with Angular 13, you can entirely disable the navigation, if you set the same values to routerLink directive. Another add-on is Active Change, a new output for the RouterLink directive; which is produced every time when a related link becomes either active or inactive. Developers using V13 can use dynamic ESM import statements as in this updated version; the load property that is a part of the route definition is unable to accept string values.
Enhancements to Angular Material Components
The enhancements made to Angular Material Components include:
· The addition of a default role to the “table” and stepper updations
· Improved ARIA descriptions and Datepicker
· Better accessibility of matChipRemove and a sturdy focus option for the slider
· The touch sizes of the radio buttons and checkboxes are now bigger resulting in a smoother UX with higher contrast modes.
· The feature of accurately detecting fake mouse down events from the screen readers employing FocusMonitor such that Angular applications are able to correctly interpret the occurrence of focus or click events on the screen.
Performance Improvements in Angular 13
· The usage of ergonomic code-splitting APIs and the practice of breaking down the granular code at a component level has reduced the load times considerably.
· ESBuild, a superfast JavaScript bundler, has helped in enhancing the performance as well. It works with Terser for optimizing global scripts, supports CSS source maps that allow optimized global CSS, and also supports languages such as Vue, Svelte, and Elm that are used in other frameworks.
· Owing to the new enhanced Angular CLI, the framework currently supports persistent build-cache by default — build outcomes are cached on the disk. Consequently, the speed of Angular app development accelerates by 68% as compared to the existing speed.
· In V13, the opt-in feature is enabled by default
· There are no Angular traits such as Directive, Component, Pipe, NgModule decorators, Injectable, etc. in the incremental builds performance.
Support for IE11 removed
The Angular team has removed support for IE11 (Internet Explorer11) in the latest version Angular13, based on customer feedback, to make it future-ready. As a result, the entire infrastructure concerning IE11 — build passes, CSS code paths, polyfills, special JS, etc. — will be eliminated.
Advantages
· Angular can now enjoy the benefits of native web APIs and also leverage the features of new-age browsers — web animations and CSS variables.
· Angular applications built in Angular 13 will have smaller-sized bundles and load faster as code paths and IE-specific polyfills can be removed.
· It eliminated the requirement for differential loading.
The build infrastructure and enhanced APIs will prove beneficial to Angular app developers, whereas the end-users will enjoy speedier load times as well as an improved UX.
However, this update will affect organizations that still use Internet Explorer 11 and have not yet migrated to modern browsers like Microsoft Edge. For migrating your project to Angular 13, you have to run the ng update — this will automatically drop the IE-specific polyfills and minimize the bundle size during migration. The existing Angular development projects that still need the support for IE11, can continue using Angular 12, which will be supported till November 2022.
Other Noteworthy Add-ons and Enhancements in Angular 13
· The introduction of TypeScript 4.4 allows users to access the multiple languages functionality while working on it. This feature was absent in the previous Typescript versions.
· Now in-built validators like max,min, and minLength can be dynamically enabled or disabled.
· The support for inlining Adobe Fonts has been added in Angular 13, just as inlining Google font support was added during the Angular11 update. Inlining fonts are responsible for speeding up the FCP (First Conceptual Performance) and this improves the web performance substantially.
· Angular Developers can leverage the benefits of the updated RxJS7.4 for developing new projects employing the new ‘ng’ command. The Angular projects that are in RxJS V6.x, are to be manually updated with the help of the command npm install rjs@7.4.
· The TestBed segment is now an improved one that functions impeccably to tear down test modules and environments after every test. The DOM gets cleaned by default after each test. So, developers can expect tests that are lesser memory-intensive, have a lower amount of interdependency, are more optimized, and get executed much faster.
Bottomline:
I hope my post has provided you with comprehensive insights on the most significant updates that influence Angular app development.
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