![\"image](\"https:\/\/www.tothenew.com\/blog\/wp-ttn-blog\/uploads\/2025\/02\/angular19_banner_white_text.jpg\")
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On November 19, 2024, Angular officially released version 19, continuing its commitment to enhancing the developer experience and pushing the boundaries of web application<\/a> efficiency. Each year, Angular introduces innovative features, and this release is no exception.<\/p>\n Angular 19 is a stable release, bringing key performance enhancements and developer productivity improvements along with a few experimental features. In their official announcement, the Angular team stated, “Seeing the positive community response and increased engagement in our developer events validates that we\u2019ve been moving in the right direction.”<\/em><\/p>\n This update focuses on optimizing application speed, refining developer workflows, and integrating some of the most highly requested features from the community. With Angular 19, building modern, high-performance web applications has never been more seamless.<\/p>\n In this post, we’ll dive into the key updates in Angular 19 and explore real-world examples that showcase how to take full advantage of these new features in our own Angular applications. \ud83d\ude80<\/p>\n Angular 19 takes performance to the next level by focusing on optimization for performance-sensitive applications and integrating out-of-the-box best practices. This release introduces incremental hydration for server-side rendering (SSR), enabling faster initial page loads and smoother interactions. Additionally, server route configuration, event replay (now enabled by default), and other enhancements push Angular\u2019s SSR capabilities even further.<\/p>\n In the past, large Angular applications often shipped excessive JavaScript to users, negatively impacting performance. With Deferrable Views, previously used for client-side rendering, now extended to server-side rendering, Angular optimizes performance by deferring non-critical JavaScript loading. These advancements, along with server route configuration and automatic event replay, ensure that Angular 19 delivers high-performance, modern web applications more efficiently than ever before.<\/p>\n The latest release of Angular 19 brings a wealth of improvements and new features designed to enhance performance, reduce dependencies, and improve developer experience. With a strong focus on core web vitals and modern best practices, Angular 19 introduces several exciting updates:<\/p>\n With these updates, Angular 19 continues to push the boundaries of modern web development, making it easier than ever to build high-performance, scalable, and secure applications.<\/p>\n In previous versions of Angular, enabling server-side rendering (SSR) meant that all parameterized routes<\/strong> were rendered dynamically on the server, while static routes<\/strong> were prerendered. However, with Angular 19, a new feature called ServerRoute<\/strong> provides fine-grained control over how individual routes are rendered.<\/p>\n This ServerRoute<\/strong> interface allows developers to customize rendering behavior<\/strong> for each route, specifying whether it should be:<\/p>\n Here’s an example of how to configure route-level rendering using serverRouteConfig<\/strong>:<\/p>\n Angular 19 also allows prerendering routes that include dynamic parameters using the getPrerenderPaths method. This is useful for pages that require SEO optimization, such as product pages, blog posts, or user profiles<\/strong>.<\/p>\n Angular 19 introduces a major enhancement with Hot Module Replacement (HMR)<\/strong> for styles and templates, streamlining the development workflow by eliminating full-page refreshes after modifications.<\/p>\n Previously, any change to a component’s style or template triggered a full application rebuild and browser reload\u2014an inefficient process, especially for large projects.<\/p>\n With HMR, Angular now selectively compiles and patches<\/strong> updated styles or templates in real time while preserving the application’s state. This results in faster development cycles<\/strong> and a smoother, uninterrupted user experience<\/strong><\/p>\n What\u2019s New<\/strong> Why It Matters<\/strong> Migration<\/strong> How to enable<\/strong><\/p>\n Add the following to your\u00a0tsconfig.json<\/em>:<\/p>\n Angular Material provides a built-in TimePicker component that allows users to select a specific time. It is the most requested feature and offers customization options for time formats, validation, and accessibility. You can easily integrate it into your Angular applications to provide a user-friendly time selection experience.<\/p>\n EX:<\/strong>\u00a0 \u00a0 datetimepicker.component.html<\/p>\n datetimepicker.component.ts<\/p>\n The Angular CDK (Component Development Kit) offers powerful drag-and-drop functionality, including support for two-dimensional drag-and-drop. You can create flexible and interactive drag-and-drop interfaces for various use cases, such as rearranging items in a grid or transferring items between different containers. This feature can be used to implement complex drag-and-drop layouts like sortable grids or kanban boards.<\/p>\n EX: dragDropEg.component.html<\/p>\n dragDropEg.component.ts<\/p>\n Angular 19 introduces Linked Signals<\/strong>, a powerful new feature designed to simplify local state management when it depends on other signals. This feature allows us to create a writable signal that can automatically reset based on changes in other signals, ensuring state remains in sync with dynamic data.<\/p>\n Linked Signals provide an efficient way to track and update local state without manually handling dependencies. When a dependent signal changes, the linked signal automatically updates, reducing the need for complex state management logic.<\/p>\n Common Use Cases<\/strong><\/p>\n With Linked Signals, managing reactive state in Angular 19 becomes more intuitive and efficient, making it a valuable addition for developers working with dynamic data.<\/p>\n Note:<\/strong> There are some features still in developer previews, which we will discuss later; for more info, refer angular docs<\/a><\/p>\nBuilt for Speed \u2013 Angular 19<\/strong><\/h3>\n
What’s New in Angular 19?<\/h3>\n
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Route-level Render Mode in Angular 19<\/strong><\/h2>\n
\n
Defining Rendering Modes<\/h3>\n
TypeScript Example: Setting Rendering Modes<\/h4>\n
export const serverRouteConfig: ServerRoute[] = [\r\n{ path: '\/login', mode: 'server' }, \/\/ Render login on the server for better security\r\n{ path: '\/dashboard', mode: 'client' }, \/\/ Render dashboard on the client for a dynamic UI\r\n{ path: '\/**', mode: 'prerender' }, \/\/ Prerender all other routes for faster loading\r\n];<\/pre>\n\n
\n
Prerendering with Route Parameters<\/h4>\n
TypeScript Example: Prerendering Dynamic Routes<\/h4>\n
export const serverRouteConfig: ServerRoute[] = [\r\n{\r\n path: '\/product\/:id',\r\n mode: 'prerender',\r\n async getPrerenderPaths() {\r\n const productService = inject(ProductService);\r\n const productIds = await productService.getProductIds(); \/\/ Fetch product IDs (e.g., [\"1\", \"2\", \"3\"])\r\n return productIds.map(id => ({ id })); \/\/ Generate static URLs (e.g., [\"\/product\/1\", \"\/product\/2\", \"\/product\/3\"])\r\n },\r\n},\r\n];<\/pre>\n\n
Hot Module Replacement in Angular 19<\/strong><\/h2>\n
Standalone Components by Default in Angular 19<\/strong><\/h2>\n
\nIn Angular 19, standalone components, directives, and pipes<\/em> now default to true, eliminating the need for the standalone: true<\/em> metadata.<\/p>\n
\nThis update simplifies component metadata, enhancing code readability and modularity while reducing boilerplate.<\/p>\n
\nWhen running ng update<\/em>, the Angular CLI will automatically remove standalone: true<\/em> from components that no longer require it, ensuring a seamless transition.<\/p>\n{ \r\n \"angularCompilerOptions\": { \r\n \"strictStandalone\": true \r\n } \r\n}<\/pre>\nTime Picker Component<\/strong><\/h2>\n
<mat-form-field>\r\n\u00a0\u00a0<input\u00a0matInput\u00a0[matDatepicker]=\"picker\"\u00a0placeholder=\"Choose\u00a0a\u00a0date\"\u00a0[(ngModel)]=\"date\">\r\n\u00a0\u00a0<mat-datepicker-toggle\u00a0matSuffix\u00a0[for]=\"picker\"><\/mat-datepicker-toggle>\r\n\u00a0\u00a0<mat-datepicker\u00a0#picker><\/mat-datepicker>\r\n<\/mat-form-field>\r\n\u00a0\u00a0<span>\r\n\u00a0\u00a0\u00a0\u00a0{{date\u00a0|\u00a0date:'medium'}}\r\n\u00a0\u00a0<\/span>\r\n<div>\r\n\u00a0\u00a0<button\u00a0cdkOverlayOrigin\u00a0\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0#trigger=\"cdkOverlayOrigin\"\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(click)=\"isOpen\u00a0=\u00a0!isOpen\">\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0time\r\n\u00a0\u00a0<\/button>\r\n<\/div>\r\n<ng-template\u00a0cdkConnectedOverlay\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0[cdkConnectedOverlayOrigin]=\"trigger\"\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0[cdkConnectedOverlayOpen]=\"isOpen\"\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0[cdkConnectedOverlayHasBackdrop]=\"true\"\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0[cdkConnectedOverlayBackdropClass]=\"'backdrop'\"\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(backdropClick)=\"isOpen\u00a0=\u00a0false\">\r\n\u00a0\u00a0<app-time-picker\u00a0[date]=\"date\"\u00a0(setDate)=\"onSetDate($event)\"><\/app-time-picker>\r\n<\/ng-template><\/pre>\nexport class DatepickerOverviewExample {\r\n\u00a0\u00a0isOpen\u00a0=\u00a0false;\r\n \u00a0date;\r\n\u00a0\u00a0public\u00a0onSetDate(newDate:\u00a0Date)\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0this.isOpen\u00a0=\u00a0false;\r\n\u00a0\u00a0\u00a0\u00a0this.date\u00a0=\u00a0newDate;\r\n\u00a0\u00a0}\r\n}<\/pre>\nTwo-dimensional Drag and Drop<\/strong><\/h2>\n
\u00a0<div\u00a0cdkDropList\u00a0[cdkDropListData]=\"MoviesList\"\r\n\u00a0\u00a0\u00a0\u00a0class=\"movie-list\"\u00a0(cdkDropListDropped)=\"onDrop($event)\">\r\n\u00a0\u00a0\u00a0\u00a0<div\u00a0class=\"movie-block\"\u00a0*ngFor=\"let\u00a0moviesList\u00a0of\u00a0MoviesList\"\u00a0cdkDrag>{{moviesList}}<\/div>\r\n\u00a0\u00a0<\/div><\/pre>\nexport class DragDropEg implements OnInit {\r\n\u00a0\u00a0\/\/\u00a0Transfer\u00a0Items\u00a0Between\u00a0Lists\r\n\u00a0\u00a0MoviesList\u00a0=\u00a0[\r\n\u00a0\u00a0\u00a0\u00a0'The\u00a0Far\u00a0Side\u00a0of\u00a0the\u00a0World',\r\n\u00a0\u00a0\u00a0\u00a0'Morituri',\r\n\u00a0\u00a0\u00a0\u00a0'Napoleon\u00a0Dynamite',\r\n\u00a0\u00a0\u00a0\u00a0'Pulp\u00a0Fiction',\r\n\u00a0\u00a0\u00a0\u00a0'Blade\u00a0Runner',\r\n\u00a0\u00a0\u00a0\u00a0'Cool\u00a0Hand\u00a0Luke',\r\n\u00a0\u00a0\u00a0\u00a0'Heat',\r\n\u00a0\u00a0\u00a0\u00a0'Juice'\u00a0\u00a0\u00a0\u00a0\r\n \u00a0];\r\n\u00a0\u00a0public\u00a0onDrop(event:\u00a0CdkDragDrop<string[]>)\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0if\u00a0(event.previousContainer\u00a0===\u00a0event.container)\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0moveItemInArray(event.container.data,\u00a0event.previousIndex,\u00a0event.currentIndex);\r\n\u00a0\u00a0\u00a0\u00a0}\u00a0else\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0transferArrayItem(event.previousContainer.data,\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0event.container.data,\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0event.previousIndex,\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0event.currentIndex);\r\n\u00a0\u00a0\u00a0\u00a0}\r\n\u00a0\u00a0\u00a0\u00a0console.log(event.container.data);\r\n\u00a0\u00a0\u00a0\u00a0console.log(event.previousContainer.data);\r\n \u00a0}\r\n}<\/pre>\nLinked Signals<\/strong><\/h3>\n
How It Works<\/strong><\/h3>\n
\n
import { computed, linkedSignal } from '@angular\/core';\r\n\r\nconst timestampMs = signal(Date.now());\r\n\r\n\/\/ computed(): Signal (not writable)\r\nconst timestampSeconds = computed(() => timestampMs() \/ 1000);\r\ntimestampSeconds.set(0); \/\/ \u274c compilation error\r\n\r\n\/\/ linkedSignal(): WritableSignal\r\nconst timestampSecondsLinked = linkedSignal(() => timestampMs() \/ 1000);\r\ntimestampSecondsLinked.set(0); \/\/ \u2705 works<\/pre>\n