angular / angular/components

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

Abierto
#28,004 1 comentario 1 reacción 0 asignados Ver en GitHub
Accessibility area: cdk/table area: material/table P3
Lenguaje dominante
TypeScript
Estrellas
25k
Forks
6.8k
Merge medio
1 d 8 h
PR fusionados (30 d)
91

Descripción

### 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

Guía de contribución

Abrir la guía de contribución

Línea de trabajo

Comienza con la reproducción de StackBlitz en src/example/table-sticky-complex-flex-example.html y reproduce el problema usando desplazamiento horizontal, columnas sticky e inputs en una fila. Verifica la corrección recorriendo con el tabulador todos los inputs y confirmando que el elemento enfocado permanezca visible en lugar de quedar oculto por las columnas sticky.

Escrito por el modelo de indexación a partir del texto del issue.

Evaluación

Stack tecnológico
angular, typescript
Área
accessibility, frontend
Tipo de issue
Error
Dificultad
4/5
Tiempo estimado
3-5 días
Estado de actividad
Estancado
Claridad
Bastante claro
Aptitud para principiantes
25/100

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