![]() ![]() You can use both Flow and Hilla views in the same application. Can you use both Frameworks in the same application? You can continue to build applications 100% in Java using Flow without any issues- in fact, a lot of businesses rely on Flow today. Hilla is a separate and complementary framework. Vaadin automatically generates a REST service and enhances it with async TypeScript functions for convenient, type-safe backend access. You can expose backend services by annotating a Java class with an annotation. Apps built using Flow run in the browser and you can make them work offline. The responsive templates give you full control over the DOM and unrivaled rendering performance. ![]() The Hilla framework helps you write frontend apps, but still enjoy full-stack type safety and easily, secure access to the backend. It is not possible to write offline functionality using Flow (but you can add offline views to a Flow application using Hilla). The downside of Flow is that it requires a reliable internet connection to use the application. The server-side architecture makes Flow extremely secure by design. The UI code runs on the JVM and you have full access to server resources, like dependency injection containers and databases. Server-client communication is automated: you don't need to write REST endpoints or other communication-layer code. You can build the entire application in Java using Flow. The Flow framework is focused on productivity and security. The programming model is similar to React, which makes it easy to pick up if you have previous experience with that. The component and template syntax use standard TypeScript, which means there are very few custom concepts you need to learn. The components have a template that is efficiently re-rendered on any state change. Hilla's TypeScript views are based on LitElement, a small, reactive web-component library. Instead, components emit events on user interaction, which you can use to update the UI. The Java programming model is similar to desktop app programming, because it abstracts away from a request and response way of thinking. Each component is a Java class and you can create more complex components by combining them with layouts. Vaadin Flow's Java API is easy to learn if you are familiar with Java. How hard is it to learn Vaadin? Vaadin Flow
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