I have a multi-project setup with a Spring back-end and a Vaadin 23 Flow front-end. I'm trying to synchronize the session lifecycles so that when the back-end session expires, the Vaadin UI correctly ...

Context: I'm trying to start a session using VaadinSession component. I'm showing a login page in which I'm entering username and password and after hitting the login button, I'll be redirected to ...

Title: Vaadin 23 WAR deploy to Tomcat 9 returns 404 despite correct WAR structure. I’m deploying a Vaadin 23, Java 11 WAR (non‑Spring Boot) to Tomcat 9 as ROOT.war. The WAR includes: flow-build-info....

I'm building a Vaadin 23 + Spring Boot 2.7 application and trying to integrate Spring Session JDBC to expire sessions after 1 minute of inactivity. Problem: When I start the app, the browser (...

There is no select method in the ComboBox class. Is there any other to preselect an item in a Vaadin Combobox? This is my code: final ComboBox<ReportTypeEnum> selectionBox = new ComboBox<>(...

I want to display a datetimepicker in a column layout with Vaadin 23. DateTimePicker dateTimePicker = new DateTimePicker(); dateTimePicker.addClassName("stacked"); add(dateTimePicker); It is ...

Failed to execute goal com.vaadin:vaadin-maven-plugin:23.3.11:build-frontend (build-frontend) on Maven Project containing Vaadin 23 version: Note: I am trying to migrate Vaadin 7 (maven) project to ...

I'm attempting to place 3 items on the left of the screen (text-field, date-picker, and select-dropdown) vertically. Then I would like 3 select dropdowns placed horizontally on the right side of the ...

I want to use keyboard shortcuts in a vaadin flow 23 application inside an active grid editor. I get occasionally an exception in the test server which I can not reproduce locally: java.lang....

I am using Vaadin 23 and trying to perform a sort. However, requirement is to sort the fetched element on the UI and not invoking the backend. Here is the code for reference Setting up backend data ...

We migrated from vaadin 8 to 23 and had to change the class com.vaadin.ui.Grid to com.vaadin.flow.component.grid.Grid. Implementation changed for column sorting. I added column using below code and ...

When trying to package my project like mentioned on the Vaadin 23 website : mvn clean package -Pproduction I get the following error: [ERROR] Failed to execute goal com.vaadin:vaadin-maven-plugin:23....

In vaadin 24 , i am facing one issue related to rendering of page is slow due to Twincolselect.setItems , where i have only 900 records to set . but it was much faster in 23 version . I tried to set ...

I'm using an ItemClickListener on my grid and also multi select mode. Problem is if you click slightly, next to the selection checkbox the click event is fired and all selections are deleted. My Idea ...

I found out a strange behavior of the grid component. I have app with multiple tabs in each tab can be multiple grids, sometimes i handle some errors by showing dialog in addColumn method. I found out ...