Preparing for Angular 17 End-of-Life: What Developers Need to Know

Angular 17, released in November 2023, brought significant improvements, including new control flow, better reactivity, and performance enhancements. However, like all major Angular versions, it follows Google’s scheduled support lifecycle. That means Angular 17 will officially reach end-of-life (EOL) on May 15, 2025.

Once EOL hits, Angular 17 will no longer receive security updates, bug fixes, or official support, making applications still running on this version increasingly vulnerable to security threats and compatibility issues. Developers relying on Angular 17 must act now to ensure their applications remain secure, compliant, and fully supported.

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Changes between Angular 17 and Angular 18

There are a number of changes to your app and ecosystem required in migration.  Angular’s migration guide includes the following changes to keep in mind for medium-complexity projects:

• Make sure that you are using a supported version of node.js before you upgrade your application. Angular v18 supports node.js versions: v18.19.0 and newer
• Update TypeScript to versions 5.4 or newer.
• Import StateKey and TransferState from @angular/core instead of @angular/platform-browser.
• Use includeRequestsWithAuthHeaders: true in withHttpTransferCache to opt-in of caching for HTTP requests that require authorization.
• Remove expressions that write to properties in templates that use [(ngModel)]
• Move any environment providers that should be available to routed components from the component that defines the RouterOutlet to the providers of bootstrapApplication or the Route config.
• Provide an absolute url instead of using useAbsoluteUrl and baseUrl from PlatformConfig.
• For any components using OnPush change detection, ensure they are properly marked dirty to enable host binding updates.

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Recommended Actions for Developers

To maintain the security and stability of your applications, take the following steps before Angular 17 reaches EOL:

1. Upgrade to Angular 18 or the Latest LTS Version

The best way to future-proof your applications is to migrate to Angular 18 or the latest LTS version before the May 2025 deadline. Upgrading ensures continued access to new features, security patches, and performance improvements.

2. Test Thoroughly Before Deployment

Before rolling out the upgrade, conduct comprehensive testing to identify potential compatibility issues with dependencies, third-party libraries, and internal code. A robust QA process can help prevent unexpected failures in production.

3. Stay Informed on Angular Releases

Google continuously improves Angular with each new release. Keep track of official Angular announcements and documentation to stay ahead of deprecations, breaking changes, and best practices for future upgrades.

4. Extend Support with HeroDevs NES

If upgrading before the May 2025 deadline isn’t feasible for your team, HeroDevs, in partnership with Google, offers Never-Ending Support (NES) for Angular. NES provides ongoing security patches, compatibility updates, and compliance assurance, allowing you to continue running Angular 17 safely while planning your migration on your own timeline.

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Why You Should Act Now

Delaying the upgrade past Angular 17’s EOL puts your application at risk of unpatched security vulnerabilities, compliance issues, and potential compatibility problems with future web technologies. Whether you choose to upgrade or secure extended support, taking action now ensures your Angular applications remain stable, secure, and future-ready.

For organizations needing long-term support for Angular 17, explore HeroDevs’ NES solutions to maintain compliance and security beyond May 2025.