angular / angular/components

bug(Table): Tab navigation on inputs inside table with sticky columns (focus out of sight)

Offen
#28,004 1 Kommentar 1 Reaktion 0 zugewiesene Personen Auf GitHub ansehen
Accessibility area: cdk/table area: material/table P3
Vorherrschende Sprache
TypeScript
Sterne
25k
Forks
6.8k
Ø Merge
1 T. 8 Std.
Gemergte PRs (30 T.)
91

Beschreibung

### Is this a regression?

- [ ] Yes, this behavior used to work in the previous version

### The previous version in which this bug was not present was

_No response_

### Description

When having multiple inputs on one row, one input per cell, inside a table with one or more sticky columns the TAB key navigation is focusing at some point on an input that is hidden under the sticky columns, making the focus out of sight, but still inside the table.

The current behavior it's not compliant with the latest accessibility guidelines (WCAG) that states that an element that is focused needs to be in sight. (ref link: https://www.w3.org/WAI/WCAG22/Understanding/focus-not-obscured-minimum)

### Reproduction

StackBlitz link:
https://stackblitz.com/edit/r22tvc?file=src%2Fexample%2Ftable-sticky-complex-flex-example.html

Table state:
- have horizontal scroll (requires a higher number of columns)
- one or more columns sticky
- on at least one row have an input on each cell

Steps to reproduce:
1. Scroll the table in order to hide some columns under the sticky columns
2. Focus first inside the first cell of the row with the inputs
3. Press TAB key in order to navigate through the inputs
4. The focus at some point is on the input that is hidden under the sticky columns

### Expected Behavior

The focused element should be in sight, visible, not hidden under the sticky columns.

### Actual Behavior

The focus is hidden under the sticky columns, out of sight.

DEMO:
![table_TAB_focus](https://github.com/angular/components/assets/26005241/58a91a07-5b04-41c3-a54c-f1ccda6b9b8c)

### Environment

- Angular: 16.1.1
- CDK/Material: 16.2.9
- Browser(s): Chrome (118.0.5993.89) / Firefix (119.0)
- Operating System (e.g. Windows, macOS, Ubuntu): Windows x64

Beitragsleitfaden

Beitragsleitfaden öffnen

Rechercherichtung

Beginne mit der StackBlitz-Reproduktion unter src/example/table-sticky-complex-flex-example.html und reproduziere das Problem mithilfe von horizontalem Scrollen, fixierten Spalten und Eingabefeldern in einer Zeile. Überprüfe die Behebung, indem du mit der Tabulatortaste durch jedes Eingabefeld navigierst und bestätigst, dass das fokussierte Element sichtbar bleibt, anstatt von fixierten Spalten verdeckt zu werden.

Vom Indexierungsmodell aus dem Issue-Text verfasst.

Bewertung

Tech-Stack
angular, typescript
Bereich
accessibility, frontend
Issue-Typ
Bug
Schwierigkeit
4/5
Geschätzter Aufwand
3-5 Tage
Aktivitätsstatus
Veraltet
Klarheit
Größtenteils klar
Anfängerfreundlichkeit
25/100

Neue Issues direkt in Ihr Postfach

Eine kurze Übersicht über anfängerfreundliche GitHub-Issues.