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What's new in Angular 17: A Developer Guide to Angular 17 New Features

What's new in Angular 17: A Developer Guide to Angular 17 New Features

27 Feb 2024
Beginner
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5 min read
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What's new in Angular 17: An Overview

Experience the total revamp of Angular v17 with insights from our comprehensive Angular Tutorial, bringing more than just a set of new functionalities. To start, there will be enhanced developer experience, improved performance, and a new look. Our Angular Training teaches you how to use standalone components, signals, and new syntax in Angular. Benefit from faster build speeds that are driven by ESBuild's CLI."

What is Angular 17

Angular 17 is more than simply a collection of new features; it represents a full redesign of the Angular framework. It promises an enhanced developer experience, enhanced performance, and a new look. Highlights include signals, a new syntax for control flow and lazy loading, standalone components, and an ESBuild-powered CLI.

Read More - Advanced Angular Interview Questions and Answers

How to Install Angular 17?

Check for Node.js and npm

  • Make sure you have installed npm (version 5.6 or later) and Node.js (version 14 or later).
  • To verify, use npm -v and node -v in your terminal.
  • If not, go to https://nodejs.org/ to download and install Node.js.

Install Angular CLI globally

  • Open your terminal and run: npm install -g @angular/cli@17

What’s New in Angular 17: Features and Updates

New Syntax for Control Flow in Templates

  • To utilize the declarative control flow syntax, import @angular/core.
  • Instead of using NgIf, NgFor, and NgSwitch, use @if, @else, and if.
  • Use @ directives in angular to conditionally wrap content and pass expressions for evaluation.
  • Using <div @if="isLoggedIn">...</div> as an example
  • Use the @else and @else if directives to create intricate reasoning.
  • Conditional logic is easier to construct and maintain with the new syntax, which is also more expressive and accessible.
  • Use @ to enclose any HTML content, including components, directives, and templates.
  • Use @ to control an element's visibility; for example, use @if to hide a button.
  • Construct nested conditional statements using @, such as verifying the role and login of the user.

Automatic Migration to Build-in Control Flow

  • The @angular/core package has a schematic that you can use to automatically convert your code to the new control flow syntax: ng g @angular/core:control-flow

Build Performance with ESBuild

  • Angular CLI now challenges Webpack's hegemony by bundling quicker via ESBuild.
  • New Angular 17 projects are created using ESBuild by default.
  • Simply add -esbuild to commands to convert current projects to ESBuild.
  • With ESBuild, ng serves and ng build function as usual, but much more quickly.
  • Vite dev server is used to build npm packages only when necessary, for maximum performance.
  • The CLI team made additional speed improvements.
  • An installation manual for Windows systems' Angular CLI is accessible.
  • The Angular 17 CLI includes the Stable Application Builder.

Enhanced Support for Server Side Rendering (SSR)

  • Easily enable SSR by adding @angular/ssr later or by using the --ssr switch during ng new.
  • Browser bundles for development and server-side rendering are handled by ng serve.
  • Bundles are created for a Node.js server and both environments using ng build --ssr.
  • Use ng build --prerender to render individual routes without the need for a Node.js server.
  • The @angular/ssr package, for SSR capabilities, is provided by the Angular team.
  • Improved SSR setting and setup thanks to new schematics.
  • SSR provides enhanced user experience, performance, and SEO.
  • Take into account SSR for apps that depend heavily on content or SEO.

Deferred Loading

  • A new template syntax for the conditional loading of elements and angular components is called Defer.
  • Exceeds traditional lazy loading by allowing loading contingent on conditions or user inputs.
  • Loading components only when necessary cuts down on initial load times and conserves resources.
  • Needs deferring independent dependencies.
  • Integrates spinners or placeholders during loading with loading blocks.
  • Compatible with viewport events, timers, hovers, clicks, and custom circumstances as triggers.
  • Can be used to preload components in the background for quicker loading in conjunction with prefetching.
  • Perfect for big components loaded after certain interactions or below the fold.

Other Features of Angular 17

  • Support for unique element bindings and element providers has been expanded in Angular 17.
  • Improved support for internationalization and accessibility is included in Angular 17's most recent version.
  • The View Transitions API can now be used with the router.
  • Animations are now able to load slowly.
  • Functional interceptors are produced by the ng g interceptor command.
  • A diagnostic now alerts the user when reading signals in templates if the getter call was overlooked (e.g., {{ products }} instead of {{ products() }}).
  • A modification to a data-bound signal causes Angular to only identify as dirty the components that are directly impacted by the change (i.e., the components that data-brind this signal).
  • One can create standalone directives, standalone components, and standalone pipelines using the Angular CLI. Additionally, independent component bootstrapping is provided by ng new by default. The behavior can be turned off using the –standalone false option.
  • The Ivy compiler is the next iteration of the Angular compiler, initially introduced with Angular 12. Angular 17 has improved the Ivy compiler in several ways, making it faster and more efficient.
Summary

Angular 17 is not merely an update; it's a complete redesign. It has a fresh appearance, a better developer interface, and better performance. Highlights include new control flow syntax, signals, and standalone components. The CLI powered by ESBuild accelerates builds. Improved SSR support, deferred loading, and expanded element binding/provider support are some of the additional features.

FAQs

Q1. What's new with Angular 17?

As part of its new movement, Angular 17 provides Signals and Standalone Components. You can anticipate an enhanced Angular Renaissance with Angular 17. It features enhanced support for Server-Side Rendering (SSR), a new control flow syntax, and greater support for lazy loading of page components.

Q2. Which of the following are the new features of angular7?

Introduced a new functionality called Virtual Scrolling in Angular 7. As the name suggests, virtual scrolling allows users to read large amounts of scrollable material considerably more quickly and flexibly by loading and unloading objects from the DOM based on visible portions of the content.

Q3. Is Angular 17 stable?

Angular 17's stable version is now available. With each new release, the Angular development team seems to want to surprise us, and version 17 is no different.

Q4. How do I update to Angular 17?

To update your application to Angular v17, run ng update @angular/core@17 @angular/cli@17 in the project directory of the application. Now that Angular automatically eliminates styles from destroyed components, this could affect your current apps if you depend on stolen styles.

Q5. Why Angular is discontinued?

As more flaws in the AngularJS framework are discovered and left unfixed, websites and online apps created with this framework will eventually become less secure. These flaws are used by hackers and other bad actors to obtain user data from online applications and insert their own code within them.

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About Author
Shailendra Chauhan (Microsoft MVP, Founder & CEO at Scholarhat by DotNetTricks)

Shailendra Chauhan is the Founder and CEO at ScholarHat by DotNetTricks which is a brand when it comes to e-Learning. He provides training and consultation over an array of technologies like Cloud, .NET, Angular, React, Node, Microservices, Containers and Mobile Apps development. He has been awarded Microsoft MVP 8th time in a row (2016-2023). He has changed many lives with his writings and unique training programs. He has a number of most sought-after books to his name which has helped job aspirants in cracking tough interviews with ease.
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