vaadin/flow-components

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Java counterpart of Vaadin Web Components

Stars: 129
Forks: 78
Open beginner issues: 7
Indexed issues: 902
Avg merge: 17h 42m
Merged PRs (30d): 196

Dominant language: Java
License: No license data
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue help wanted

Beginner friendly Everything

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902 open issues indexed

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
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
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
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
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: 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: 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: EmailField shows no message for a bean validation failure Open

documentation vaadin-text-field

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

vaadin/flow-components#10062 · 3 comments · Opened Sep 9, 2026
LitRenderer accepts function names that silently shadow the template's own identifiers Open

DX refactor

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

vaadin/flow-components#9987 · 1 comment · Opened Aug 28, 2026
Update I18N APIs to never install a default instance or provide defaults Open

I18N requires new major v26

Difficulty 4/5 3-5 days Newbie friendliness 50/100

vaadin/flow-components#9923 · Opened Aug 21, 2026
Difference between Card title and header slots are not clear from the API Open

refactor requires new major vaadin-card

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

vaadin/flow-components#9921 · 1 comment · Opened Aug 20, 2026
HorizontalLayout.add bypasses signal binding checks Open

DX Impact: Low Severity: Minor vaadin-ordered-layout

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

vaadin/flow-components#9892 · Opened Aug 18, 2026
[Spreadsheet] Recreating custom editors leaves them empty with no callback to fill them Open

bug Impact: Low Severity: Major vaadin-spreadsheet

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

vaadin/flow-components#9812 · Opened Aug 3, 2026
Autoscroll to selected item Open

enhancement vaadin-time-picker

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

vaadin/flow-components#9810 · 4 comments · Opened Aug 3, 2026
Layouts: setAlignContent(..) method Open

enhancement vaadin-ordered-layout

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

vaadin/flow-components#9798 · 1 comment · Opened Jul 27, 2026
UploadManager has no API to react on `upload-error` Open

enhancement vaadin-upload

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

vaadin/flow-components#9765 · 7 comments · Opened Jul 20, 2026
Automatic icons in breadbrumbs, like in menu Open

enhancement vaadin-breadcrumbs

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

vaadin/flow-components#9751 · 1 comment · Opened Jul 16, 2026
Option to add files to UploadFileList Open

enhancement vaadin-upload workaround

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

vaadin/flow-components#9703 · 2 comments · Opened Jul 9, 2026
[Grid] Extract Grid.Column to top-level GridColumn Open

refactor v26 vaadin-grid

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

vaadin/flow-components#9701 · 1 comment · Opened Jul 8, 2026
UploadManager.*Event does not provide correct upload component Open

enhancement vaadin-upload

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

vaadin/flow-components#9693 · 3 comments · Opened Jul 7, 2026
UploadManager.FileRejectedEvent has no contentLength Open

enhancement vaadin-upload

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

vaadin/flow-components#9678 · Opened Jul 6, 2026
[Grid] Extract GridBase from Grid and make Grid and TreeGrid extend it Open

DX needs discussion refactor v26 vaadin-grid

Difficulty 4/5 3-5 days Newbie friendliness 42/100

vaadin/flow-components#9676 · 3 comments · Opened Jul 6, 2026
Grid selected items returns wrong data Open

enhancement needs design vaadin-grid

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

vaadin/flow-components#9675 · 1 comment · Opened Jul 6, 2026
Popover does not update position / size, when content is added dynamically Open

bug enhancement vaadin-popover workaround

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

vaadin/flow-components#9646 · 2 comments · Opened Jul 1, 2026
Update Tabs to use HasComponentsOfType Open

refactor requires new major v26 vaadin-tabs

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

vaadin/flow-components#9562 · Opened Jun 18, 2026
Update SideNav / SideNavItem to use HasComponentsOfType Open

refactor requires new major v26 vaadin-side-nav

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

vaadin/flow-components#9561 · 1 comment · Opened Jun 18, 2026
Spreadsheet: Remove Clear All button in favor of API Open

refactor requires new major v26 vaadin-spreadsheet

Difficulty 3/5 1-2 days Newbie friendliness 48/100

vaadin/flow-components#9508 · 1 comment · Opened Jun 15, 2026
Server-Side Component for AutoForm Open

component-idea enhancement needs design

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

vaadin/flow-components#9466 · 4 comments · Opened Jun 5, 2026
GridAIController / ChartAIController / AIOrchestrator: Chat UI needs hint on what data can be used Open

documentation

Difficulty 5/5 Over a week Newbie friendliness 30/100

vaadin/flow-components#9433 · 1 comment · Opened Jun 4, 2026
GridPro does not have GridPro(Class<T> beanType, boolean autoCreateColumns) constructor Open

enhancement vaadin-grid-pro workaround

Difficulty 2/5 1-3 hours Newbie friendliness 66/100

vaadin/flow-components#9415 · 1 comment · Opened Jun 3, 2026
Make it possible to bind Map features to Signals Open

enhancement vaadin-map

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

vaadin/flow-components#9395 · 1 comment · Opened Jun 1, 2026
Add a mechanism for mapping data objects to Map Features Open

enhancement vaadin-map

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

vaadin/flow-components#9394 · 2 comments · Opened Jun 1, 2026
Add support for GeolocationCoordinates to Map Open

enhancement vaadin-map

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

vaadin/flow-components#9393 · 1 comment · Opened Jun 1, 2026
[RFC] Reactive configuration updates for Chart Open

enhancement vaadin-charts

Difficulty 5/5 Over a week Newbie friendliness 30/100

vaadin/flow-components#9390 · Opened May 29, 2026
Make ChartAIController compatible with Spring JPA Open

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

vaadin/flow-components#9467 · 4 comments · Opened May 29, 2026
Aura utility classes API [2 days] Open

enhancement needs research theme

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

vaadin/flow-components#9347 · Opened May 25, 2026
Spreadsheet: values missing from filter dropdown Open

bug Impact: Low Severity: Major vaadin-spreadsheet

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

vaadin/flow-components#9331 · 3 comments · Opened May 21, 2026
Spreadsheet: table sorting Open

enhancement vaadin-spreadsheet

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

vaadin/flow-components#9330 · 1 comment · Opened May 21, 2026
Spreadsheet: "Clear filters" button not shown when component re-attached Open

bug Impact: Low Severity: Minor vaadin-spreadsheet

Difficulty 3/5 1-2 days Newbie friendliness 52/100

vaadin/flow-components#9328 · 1 comment · Opened May 21, 2026
Spreadsheet: Copying a table range to clipboard should omit hidden values Open

bug enhancement vaadin-spreadsheet

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

vaadin/flow-components#9327 · 4 comments · Opened May 21, 2026
Spreadsheet: filter options should be listed in logical order Open

bug Impact: Low refactor Severity: Minor vaadin-spreadsheet

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

vaadin/flow-components#9326 · Opened May 21, 2026
Spreadsheet: field for filtering filter options Open

enhancement requires new major v26 vaadin-spreadsheet

Difficulty 3/5 1-2 days Newbie friendliness 48/100

vaadin/flow-components#9323 · 5 comments · Opened May 21, 2026
Spreadsheet: show item count in Select All checkbox in filter dropdown Open

enhancement vaadin-spreadsheet

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

vaadin/flow-components#9322 · 2 comments · Opened May 21, 2026
Spreadsheet: column filter indicator Open

bug vaadin-spreadsheet

Difficulty 3/5 1-2 days Newbie friendliness 52/100

vaadin/flow-components#9321 · 4 comments · Opened May 21, 2026
[Charts] Enable light DOM styling [3 days] Open

enhancement requires new major vaadin-charts

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

vaadin/flow-components#9302 · 5 comments · Opened May 19, 2026
Card excludes slot children while accessing children Open

DX needs design refactor vaadin-card

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

vaadin/flow-components#9280 · 36 comments · 1 reaction · Opened May 13, 2026
Unify state persistence across orchestrator and controllers Open

refactor

Difficulty 5/5 Over a week Newbie friendliness 30/100

vaadin/flow-components#9206 · Opened Apr 27, 2026
Reconsider addStateChangeListener API on Chart/Grid AI controllers Open

refactor

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

vaadin/flow-components#9205 · Opened Apr 27, 2026
AIController orchestrator API leaks into Chart/Grid controller autocomplete for users Open

DX

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

vaadin/flow-components#9204 · Opened Apr 27, 2026

vaadin/flow-components

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