NashTech Insights

Angular Ivy: Exploring the New Compiler and Runtime

Alka Vats
Alka Vats
Table of Contents


Angular Ivy is the latest compiler and runtime for applications. Released with Angular version 9, Ivy brings significant improvements in terms of performance, bundle size, and developer experience. In this blog post, we will delve into the world of Angular Ivy, exploring its key features, and benefits, and how to leverage them in your Angular projects.

If you want to learn about a new feature of angular, you can refer here.

1. Understanding Ivy:

What is Ivy?

Ivy is the next-generation rendering engine for applications. It replaces the previous View Engine compiler and runtime. Ivy introduces a new way of compiling and rendering the components, resulting in faster builds, smaller bundle sizes, and improved runtime performance.

Key Features of Ivy:

a. Smaller Bundle Sizes: Ivy enables better tree shaking and eliminates unnecessary code, resulting in smaller bundle sizes.

b. Faster Compilation: Ivy’s incremental compilation significantly reduces build times, making the development workflow more efficient.

c. Improved Performance: Ivy optimizes the rendering process, resulting in faster rendering and better runtime performance.

d. Enhanced Debugging: Ivy provides improved error messages and more accurate stack traces, simplifying the debugging process.

e. Better Template Type Checking: Ivy performs enhanced template type checking, catching more errors at compile time.

2. Exploring Ivy in Action:

Enabling Ivy in an Angular Project:

To leverage Ivy in your Angular project, make sure you have Angular version 9 or higher installed. By default, Ivy is enabled in the latest Angular versions. To verify, check the tsconfig.json file, and ensure the "enableIvy": true configuration is set.

Improving Performance with Ivy:

Ivy offers various performance optimizations to enhance your Angular application’s runtime performance. Here are a few examples:

a. Strict Mode: Enabling strict mode allows Ivy to perform additional checks during development, catching potential issues and improving performance.

b. AOT Compilation: Ivy supports Ahead-of-Time (AOT) compilation, which results in faster startup times and eliminates the need for JIT (Just-in-Time) compilation during runtime. c. Component Level Tree Shaking: Ivy’s improved tree shaking capabilities eliminate dead code from components, reducing the bundle size and improving performance.

Leveraging Ivy’s Enhanced Debugging:

Ivy provides enhanced debugging capabilities, making it easier to identify and fix issues in your Angular application. The improved error messages and stack traces help pinpoint the exact location of errors. For example, if a template binding fails, Ivy provides more precise information about the error and the associated component.

Using Ivy’s Template Type Checking:

With Ivy, template type checking is more accurate and comprehensive. It detects type errors in templates during the compilation phase, allowing you to catch potential issues early on. This helps ensure type safety and reduces runtime errors.

3. Migrating to Ivy:

Automatic Migration:

For most Angular projects, migrating to Ivy is a seamless process, as it is enabled by default in newer Angular versions. However, it’s recommended to thoroughly test your application after the migration to ensure compatibility with Ivy.

Manual Migration:

In some cases, manual adjustments may be required during the migration process, especially if you are using custom-build tools or third-party libraries. The Angular documentation provides detailed guidelines on manual migration steps.


Angular Ivy significantly improves the ecosystem, offering better performance, smaller bundle sizes, enhanced debugging capabilities, and improved developer experience. By leveraging Ivy’s features, you can optimize your Angular applications and provide a faster, more efficient user experience. Whether starting a new Angular project or considering migrating an existing one, Ivy is a powerful tool that can take your development process to the next level.

Finally, for more such posts, please follow our LinkedIn page- FrontEnd Competency.

Alka Vats

Alka Vats

Alka Vats is a Software Consultant at Nashtech. She is passionate about web development. She is recognized as a good team player, a dedicated and responsible professional, and a technology enthusiast. She is a quick learner & curious to learn new technologies. Her hobbies include reading books, watching movies, and traveling.

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