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Vaadin 14.2.0.alpha2
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latest releases: 24.6.0.alpha3, 23.5.10, 24.5.4...
pre-release4 years ago

Vaadin 14.2.0.alpha2

Vaadin consists of a set of web components, a Java web framework, configurable themes, tools and a set of app templates.

With every major release, we will change and improve things based on your feedback. This may lead to breaking changes, which will be listed for each part of the platform in the breaking changes section.

Visit vaadin.com to get started.

Support

Vaadin 14 is an LTS (long term support) version, which will be supported for 5 years after the GA (general availability) release. More details of our release model are available on our roadmap page.

Vaadin also provides commercial support and warranty.

New and Noteworthy

Here are the highlighted new and improved features in Vaadin 14. To see the full list of bug fixes and improvements, check Included Projects and Change Log.

npm support

Using Bower for frontend dependencies is currently discouraged (by the author), and npm has become the defacto standard. In Vaadin 14 npm is used as the front-end package manager. Bower (compatibility mode) and WebJars are still fully supported in Vaadin 14. Using npm is the recommended mode in Vaadin 14.

Framework

  • Support for npm and ES6 modules
  • Support for Polymer 3 templates
  • Adding @PreserveOnRefresh on a router layout or route will preserve the user-edited component state when the user refreshes the page by reusing the component instances
  • Embedding Flow application is now possible by exporting it as a web component.
  • When executing JavaScript from the server-side Java, it is possible to get the return value of the execution to the server-side using Page.executeJs(String expression, Serializable... parameters)
  • It is possible to obtain details like screen width & height and time zone on the server-side using Page.retrieveExtendedClientDetails( ExtendedClientDetailsReceiver receiver)
  • Simplified styling of application and component with @CssImport

Components

  • Grid rows drag and drop
  • Grid columns auto-width
  • Customise value representation for Grid Pro
  • Menubar component added
  • App Layout with drawer
  • Clear button visibility APIs
  • Dropdown select value change without opening
  • New theme variants for Notification

Changes since 14.2.0.alpha1

Included Projects and Change Log

Vaadin includes the following projects. Release notes with detailed change logs for each project are linked below.

Projects marked as (Pro) are available for users with Pro or Prime subscriptions. Everything else is free and open source.

Components

Themes

  • Vaadin Lumo theme (v1.5.0)
  • Vaadin Material theme (v1.2.3).

Java Web Framework

Tools

Getting Started with Vaadin 14

App starters

The best way to get started with Vaadin 14 is to go to https://vaadin.com/start and pick an app template for the technology stack you’re interested in.

Manually changing Vaadin version for Java projects

Add the following contents to your project pom.xml. 

<dependencyManagement>
    ...
    <dependency>
        <groupId>com.vaadin</groupId>
        <artifactId>vaadin-bom</artifactId>
        <version>14.2.0.alpha2</version>
        <type>pom</type>
        <scope>import</scope>
    </dependency>
    ...
</dependencyManagement>
<repositories>
    <repository>
        <id>vaadin-prerelease</id>
        <url>https://maven.vaadin.com/vaadin-prereleases</url>
    </repository>
</repositories>
<pluginRepositories>
    <pluginRepository>
        <id>vaadin-prerelease</id>
        <url>https://maven.vaadin.com/vaadin-prereleases</url>
    </pluginRepository>
</pluginRepositories>

Known Issues and Limitations

This is the prerelease version of Vaadin 14.x for evaluating a number of new features and bug fixes. The API in this prerelease version is not considered final and may change based on user feedback.

OSGi support

  • OSGi with npm does not work in V14.0.0-V14.1.0. We are working on a fix for V14.x.
  • OSGi with Bower has problems with V14.0.0-V14.1.0

Flow

  • The Template-in-Template feature has some limitations
  • There are some issues in using Web Sockets as the Push channel in certain OSGi environments, but long polling works.

Components

  • The dark theme preset does not work in IE11 when applied to the <html> element.

Migrating from Vaadin 8

See the migration guide

Migrating from Vaadin 10-13

See the migration guide

Reporting Issues

We appreciate if you try to find the most relevant repository to report the issue in. If it is not obvious which project to add issues to, you are always welcome to report any issue at https://github.com/vaadin/platform/issues.

A few rules of thumb will help you and us in finding the correct repository for the issue:

  1. If you encounter an issue when using the HTML/JS API of a component or the component renders incorrectly, the problem is likely in the web component. The web component repositories are named like https://github.com/vaadin/vaadin-button
  2. If you encounter an issue when using the Java API of a component, the problem is likely in the Flow integration of the web component. The Flow component integration repositories are named like https://github.com/vaadin/vaadin-button-flow
  3. If you encounter an issue with Flow which does not seem to be related to a specific component, the problem is likely in Flow itself. The Flow repository is https://github.com/vaadin/flow
  4. If you encounter an issue with Designer, the repository is https://github.com/vaadin/designer
  5. If you encounter an issue with TestBench, the repository is https://github.com/vaadin/testbench
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