What’s New in Angular 18: An Overview with Code Examples

By · Updated30 May 2024
What’s New in Angular 18: An Overview with Code Examples
Angular, the beloved framework for building dynamic web applications, continues to innovate with each release. Angular 18 is no exception, bringing a slew of enhancements, features, and optimizations designed to make developers’ lives easier and applications more performant. Let’s dive into the highlights of this exciting new version, breaking it down point by point.

Enhanced Performance

1. Faster Compilation

Angular 18 introduces significant improvements to the Angular Compiler (ngc), resulting in faster compilation times. These enhancements mean less time waiting for builds and more time writing code. It’s a relief for developers working on large projects where build times can be a productivity bottleneck.

// Angular 18 improves compilation speed
// Old code
ng build --prod

// New code
ng build --prod --optimization=true

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2. Improved Change Detection

Change detection in Angular has been optimized to reduce the overhead associated with monitoring and updating the UI. With Angular 18, smarter change detection mechanisms minimize unnecessary checks, leading to more efficient rendering and better application performance. This means smoother user experiences and less time troubleshooting performance issues.

// Angular 18 optimizes change detection
// Old code
ngOnInit() {
  this.dataService.getData().subscribe(data => {
    this.data = data;
  });
}

// New code
ngOnInit() {
  this.dataService.getData().pipe(
    takeUntil(this.destroy$) // Improves change detection
  ).subscribe(data => {
    this.data = data;
  });
}

3. Standalone Components

One of the most anticipated features in Angular 18 is standalone components. This new approach allows developers to create components without relying on Angular modules, simplifying the architecture of smaller applications and libraries. Standalone components can be declared directly in routes or other components, offering greater flexibility and reducing boilerplate code.
  // Angular 18 introduces standalone components
// Old code
import { Component, NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';

@Component({
  selector: 'app-my-component',
  template: `<h1>Hello, standalone component!</h1>`
})
export class MyComponent {}

@NgModule({
  declarations: [MyComponent],
  imports: [CommonModule]
})
export class MyModule {}

// New code
import { Component } from '@angular/core';

@Component({
  selector: 'app-my-component',
  template: `<h1>Hello, standalone component!</h1>`
})
export class MyComponent {}

4. Angular DevTools Enhancements

Angular DevTools, the official debugging extension for Angular applications, has received several updates in Angular 18. New features include improved performance profiling, better visualization of component trees, and enhanced debugging capabilities. These improvements make it easier to identify and fix performance bottlenecks and other issues, saving time and frustration during development.
  // Angular 18 improves DevTools
// Debugging performance
console.time('renderTime');
// Render your component
console.timeEnd('renderTime');

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5. Streamlined Dependency Injection

Angular 18 simplifies the dependency injection system, making it more intuitive and easier to use. The new API provides clearer syntax and better support for hierarchical injectors, allowing for more flexible and maintainable dependency management. This makes setting up and managing dependencies a breeze, even in complex applications.
  // Angular 18 simplifies dependency injection
// Old code
constructor(private dataService: DataService) {}

// New code
constructor(private readonly dataService: DataService) {}

6. TypeScript 4.5 Support

  // Angular 18 adds support for TypeScript 4.5
// Old code
// TypeScript 4.4
type MyType = {
  name:string;
}

// New code
// TypeScript 4.5
type MyType = {
  name:string;
  age?:number; // Support for optional properties
}

7. Enhanced CLI

The Angular Command Line Interface (CLI) has been updated with new commands and options that streamline common development tasks.
  // Angular 18 enhances CLI
// Old code
ng generate component my-component

// New code
ng generate component my-component --skipTests=true

Conclusion

Angular 18 is a substantial update that brings a range of performance improvements, new features, and enhancements aimed at improving the developer experience. From faster compilation times and optimized change detection to the introduction of standalone components and improved DevTools, Angular 18 equips developers with the tools they need to build high-quality web applications more efficiently.

As always, staying up-to-date with the latest Angular release ensures that you can take advantage of the newest advancements and best practices in web development. So, dive into Angular 18 and enjoy a smoother, more productive development journey. Happy coding!

Comments (9)

  1. I recently migrate a project to Angular and your blog is incredibly helpful. The section on Standalone Components is particularly useful.

  2. Super article! Votre explication des composants autonomes d’Angular est très claire et concise. Cela m’a vraiment aidé à comprendre comment structurer mon projet.

  3. Transitioning my project to Angular was made significantly easier thanks to your blog. Your insights on Standalone Components were a game-changer for me. The clear explanations and practical tips helped me grasp complex concepts effortlessly. Your blog has become my go-to resource for all things Angular. Thank you for sharing your expertise and making the learning process enjoyable!

  4. Nice exaplantion about angular 18 update and the way it was being explained using codes was fabulous

  5. As someone who’s been using Angular for a while now, I’m always eager to learn about the latest updates. The enhancements in Angular 18 seem really promising, especially the improvements in performance. Thanks for keeping us informed!

  6. Great insights into Angular 18! I especially appreciated the clear code examples you provided—they really helped me grasp the new features quickly. Looking forward to implementing these in my projects. Keep up the excellent work!

  7. As someone diving into Angular development, your blog on Angular 18 is like a guiding light! The comments alongside the code snippets provide valuable insights and clarify any doubts I had. Can’t wait to explore these features further in my projects.

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