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vaadin

64 indexed repositories · View on GitHub

framework
Vaadin 6, 7, 8 is a Java framework for modern Java web applications.

Java · 1811 stars
hilla
Build better business applications, faster. No more juggling REST endpoints or deciphering GraphQL queries. Hilla seamlessly connects Spr...

Java · 983 stars
flow
Vaadin Flow is a Java framework binding Vaadin web components to Java. This is part of Vaadin 10+.

Java · 754 stars
platform
Vaadin platform 10+ is a Java web development platform based on Vaadin web components. If you don't know to which repository your bug re...

Java · 679 stars
web-components
A set of high-quality standards based web components for enterprise web applications. Part of Vaadin 20+

JavaScript · 582 stars
flow-crm-tutorial
Demo app for the Java Web App tutorial series

Java · 204 stars
spring
Spring integration for Vaadin

Java · 186 stars
flow-components
Java counterpart of Vaadin Web Components

Java · 129 stars
flow-spring-examples
Examples for Vaadin and Spring Boot

Java · 64 stars
skeleton-starter-flow-spring
Default project template for Vaadin using Spring Boot

Java · 60 stars
spreadsheet
Spreadsheet for Vaadin Framework

Java · 50 stars
base-starter-flow-quarkus
A project base/example for using Vaadin with Quarkus

Java · 47 stars
cdi
CDI Integration for Vaadin

Java · 44 stars
skeleton-starter-flow
Default project template for Vaadin

Java · 38 stars
docs
Official documentation for Vaadin and Hilla.

AsciiDoc · 38 stars
quarkus
An extension to Quarkus to support Vaadin Flow

Java · 34 stars
bookstore-example
Example Vaadin project available at vaadin.com/start

Java · 27 stars
vaadin-rest-example
Example of using REST services in a Vaadin application

Java · 26 stars
hilla-crm-tutorial

Java · 25 stars
testbench
Vaadin TestBench is a tool for automated user interface testing of Vaadin applications.

Java · 25 stars
44 more repositories live on View on GitHub

Beginner friendly Everything

Open All

Enabling Content Security Policy Open

Flow PRD

Difficulty 5/5 Over a week Newbie friendliness 35/100

vaadin/platform#9488 · 1 comment · 1 reaction · Opened Sep 19, 2026
Allow @JsInvoker to target a @JsModule Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vaadin/flow#25814 · 1 comment · Opened Sep 18, 2026
Call instance method for @JsInvoker methods without a @JsExpression annotation Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

vaadin/flow#25812 · 1 comment · Opened Sep 18, 2026
Support typed return values from @JsInvoker methods Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

vaadin/flow#25811 · 1 comment · Opened Sep 18, 2026
Split @JsInvoker code in the JS bundle using the same logic as @JsModule splitting Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vaadin/flow#25810 · 1 comment · Opened Sep 18, 2026
Demonstrate Observability Kit via scenario-driven examples Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

vaadin/observability-kit#401 · Opened Sep 18, 2026
[Error%20report]%20com.intellij.openapi.diagnostic.RuntimeExceptionWithAttachments:%20Access%20is%20allowed%20from%20write%20thread%20only;%20If%20you%20access%20or%20modify%20model%20on%20EDT%20consider%20wrapping%20your%20code%20in%20WriteIntentReadActio Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

vaadin/intellij-plugin#595 · Opened Sep 17, 2026
[Error%20report]%20com.intellij.openapi.diagnostic.UnhandledException:%20Access%20is%20allowed%20from%20write%20thread%20only;%20If%20you%20access%20or%20modify%20model%20on%20EDT%20consider%20wrapping%20your%20code%20in%20WriteIntentReadAction%20%20or%20R Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

vaadin/intellij-plugin#594 · Opened Sep 17, 2026
Include the Directory MCP Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

vaadin/agent-skills#13 · Opened Sep 17, 2026
Automate the maintained-branch health check Open

internal improvement

Difficulty 5/5 Over a week Newbie friendliness 25/100

vaadin/flow#25778 · 1 comment · Opened Sep 17, 2026
Grid: component cells retry `setTimeout` forever when their node never arrives (hidden component column on 25.2; hidden grid also on 25.3) Open

bug Impact: High Severity: Major vaadin-grid

Difficulty 4/5 3-5 days Newbie friendliness 56/100

vaadin/flow-components#10145 · 4 comments · Opened Sep 17, 2026
Add an awaitSignalOperation(operation) test helper for shared-signal writes Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vaadin/browserless-test#228 · 1 comment · Opened Sep 17, 2026
Locator support for slot regions (inFooter() and friends) Open

Difficulty 4/5 3-5 days Newbie friendliness 68/100

vaadin/browserless-test#226 · 2 comments · Opened Sep 17, 2026
ComboBoxElement#getOptions opens popup but never closes it Open

DX Impact: Low Severity: Minor vaadin-combo-box vaadin-multi-select-combo-box

Difficulty 2/5 1-3 hours Newbie friendliness 75/100

vaadin/flow-components#10141 · 2 comments · Opened Sep 17, 2026
Extract ui-check into a separate condition that can be turned on or off per job run Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

vaadin/vaadinbench#69 · Opened Sep 16, 2026
Make VaadinBench fully reproducible: pin and record every image, Vaadin, CLI, skill and tool version Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

vaadin/vaadinbench#68 · Opened Sep 16, 2026
[aw] Failed jobs: Documentation Bot Open

agentic-workflows

Difficulty 3/5 1-2 days Newbie friendliness 35/100

vaadin/flow#25770 · Opened Sep 16, 2026
GridPro infinite recursion in _stopEdit via editModeRenderer Open

bug Impact: Low Severity: Major vaadin-grid-pro

Difficulty 4/5 3-5 days Newbie friendliness 55/100

vaadin/flow-components#10134 · 1 comment · Opened Sep 16, 2026
Make framework-generated JavaScript invocations identifiable to an external test driver Open

Difficulty 5/5 Over a week Newbie friendliness 48/100

vaadin/flow#25734 · 1 comment · Opened Sep 15, 2026
Central dispatch for pending JavaScript invocations in testers Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

vaadin/browserless-test#221 · 13 comments · Opened Sep 15, 2026
[aw] Failed jobs: Documentation Bot Open

agentic-workflows

Difficulty 4/5 3-5 days Newbie friendliness 25/100

vaadin/flow#25726 · 1 comment · Opened Sep 15, 2026
Dev loop: a Kotlin source edit is silently skipped — apply reports "no changes" with exit 0 Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

vaadin/flow#25716 · 1 comment · Opened Sep 15, 2026
[Error report] com.intellij.openapi.diagnostic.RuntimeExceptionWithAttachments: Access is allowed from write thread only; If you access or modify model on EDT consider wrapping your code in WriteIntentReadAction or ReadAction; see https://jb.gg/ij-platfor Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

vaadin/intellij-plugin#593 · Opened Sep 15, 2026
Copilot cannot undo a file deletion Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 72/100

vaadin/intellij-plugin#590 · Opened Sep 14, 2026
Loading indicator is set to opacity 0 and pointer-events none for all stages Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

vaadin/flow#25705 · 1 comment · Opened Sep 14, 2026
[Error report] com.intellij.openapi.diagnostic.UnhandledException: Access is allowed from write thread only; If you access or modify model on EDT consider wrapping your code in WriteIntentReadAction or ReadAction; see https://jb.gg/ij-platform-threading f Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

vaadin/intellij-plugin#589 · Opened Sep 13, 2026
[Error report] com.intellij.openapi.diagnostic.RuntimeExceptionWithAttachments: Access is allowed from write thread only; If you access or modify model on EDT consider wrapping your code in WriteIntentReadAction or ReadAction; see https://jb.gg/ij-platfor Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

vaadin/intellij-plugin#588 · Opened Sep 13, 2026
Route path is decoded twice when it reaches the router already decoded Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

vaadin/flow#25690 · 1 comment · Opened Sep 12, 2026
Add support for passing parameters to event data expressions Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vaadin/flow#25658 · 4 comments · Opened Sep 11, 2026
Hackathon 25.3: Upload has no Java API for the file input's capture attribute Open

enhancement vaadin-upload

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

vaadin/flow-components#10086 · 2 comments · Opened Sep 10, 2026
Hackathon 25.3: VerticalLayout does not stretch its children, and nothing on the class says so Open

documentation vaadin-ordered-layout

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

vaadin/flow-components#10085 · 3 comments · Opened Sep 10, 2026
Store theme names in a node feature like ClassList instead of parsing the theme attribute Open

breaking change element API internal improvement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vaadin/flow#25603 · 1 comment · Opened Sep 9, 2026
Decision: "New" or "Add" for record creation, app-wide? Open

designer question ready-for-human

Difficulty 5/5 Over a week Newbie friendliness 35/100

vaadin/expense-manager#189 · Opened Sep 9, 2026
Design defects in the VAT Rates frame (143:1781): a filter for a column that isn't there, three unbound values, and a second verb Open

designer ready-for-human

Difficulty 4/5 3-5 days Newbie friendliness 55/100

vaadin/expense-manager#188 · Opened Sep 9, 2026
A "no matches" state for a filtered reference grid Open

ready-for-human

Difficulty 5/5 Over a week Newbie friendliness 35/100

vaadin/expense-manager#187 · Opened Sep 9, 2026
Reference views — the filters bar above the grid (frame 143:1781) Open

ready-for-agent

Difficulty 4/5 3-5 days Newbie friendliness 55/100

vaadin/expense-manager#186 · Opened Sep 9, 2026
Reference grids — the design's grid, with row actions behind a ⋮ (frame 143:1781) Open

ready-for-agent

Difficulty 4/5 3-5 days Newbie friendliness 68/100

vaadin/expense-manager#185 · Opened Sep 9, 2026
Make FormItem use --vaadin-input-field properties Open

refactor vaadin-form-layout

vaadin/web-components#12702 · 1 reaction · 1 assignee · Opened Sep 9, 2026
Hackathon 25.3: withResponseListener is called without a session lock, and the failure is swallowed Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

vaadin/flow-components#10075 · 2 comments · Opened Sep 9, 2026
Hackathon 25.3: Four older behaviours that cost a real application time Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

vaadin/flow#25580 · 3 comments · Opened Sep 9, 2026
Hackathon 25.3: MenuConfiguration.getPageHeader calls a title generator with no route parameters Open

Difficulty 3/5 1-2 days Newbie friendliness 70/100

vaadin/flow#25578 · 1 comment · Opened Sep 9, 2026
Hackathon 25.3: No non-deprecated way to learn that a file reached an Upload whose handler belongs to a library Open

enhancement vaadin-upload

Difficulty 5/5 Over a week Newbie friendliness 38/100

vaadin/flow-components#10064 · 4 comments · Opened Sep 9, 2026
Hackathon 25.3: CSS files pulled in with @import from a stylesheet are blocked by the default security setup Open

documentation

Difficulty 3/5 1-2 days Newbie friendliness 72/100

vaadin/flow#25576 · 1 comment · Opened Sep 9, 2026
Hackathon 25.3: Say that the driver has to be unwrapped before CDP can be reached Open

Difficulty 1/5 1-3 hours Newbie friendliness 84/100

vaadin/testbench#2305 · Opened Sep 9, 2026
Hackathon 25.3: no server side way to build a route's absolute URL Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vaadin/flow#25574 · 3 comments · Opened Sep 9, 2026
Hackathon 25.3: Three deprecations that do not name a replacement Open

documentation

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vaadin/flow#25571 · 1 comment · Opened Sep 9, 2026
Hackathon 25.3: Three things the Observability Kit pages do not say Open

Difficulty 4/5 3-5 days Newbie friendliness 58/100

vaadin/docs#5976 · Opened Sep 9, 2026
Hackathon 25.3: Seven documentation gaps found while building a real application on 25.3 Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

vaadin/docs#5975 · Opened Sep 9, 2026
Hackathon 25.3: An AI turn that produces nothing leaves no trace on any surface Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

vaadin/flow-components#10081 · Opened Sep 9, 2026
Hackathon 25.3: FeatureFlags.setEnabled rewrites the project's source file Open

documentation

Difficulty 3/5 1-2 days Newbie friendliness 68/100

vaadin/flow#25567 · 2 comments · Opened Sep 9, 2026

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