Angular offers several features to enhance performance and improve the user experience. One of these features is preloading, a mechanism to load modules in the background after the application has been bootstrapped.At the heart of this feature is the PreloadStrategy, a powerful tool for optimizing Angular applications.
In this blog post, we’ll explore what PreloadStrategy is, its significance, how it works, and how to customize it to suit your needs.
What is PreloadStrategy?
In Angular applications, lazy loading is commonly used to load modules only when needed, reducing the initial bundle size and improving load time. However, lazy loading might cause a delay when users navigate to a route whose module hasn’t been loaded yet. Preloading bridges this gap by loading lazy-loaded modules in the background after the application is initialized.
PreloadStrategy is an Angular interface that defines the strategy for preloading these modules. By default, Angular provides two built-in strategies:
- NoPreloading: Disables preloading entirely.
- PreloadAllModules: Preloads all lazy-loaded modules as soon as possible.
