angular / angular/components

bug(MatChipGrid): Chips form controls do not update values until focus is achieved and lost

Aperta
#28,065 3 commenti 6 reazioni 0 assegnatari Vedi su GitHub
area: material/chips P2
Lingua principale
TypeScript
Stelle
25k
Fork
6.8k
Merge medio
1g 8h
PR unite (30g)
91

Descrizione

### 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

There are several scenarios where this is a breaking bug:
* With a form that has a required chips field and a conditionally disabled element, the element will remain disabled even after the field is valid until it loses focus. This is confusing to users if they don't realize they need to remove focus from the chips field in order for the element to become enabled.
* When a required chips component is the last field in a form, followed by a conditionally disabled submit button and a cancel button, a user may accidentally hit the cancel button if they attempt to tab to the submit button.
* With chips that can be dragged and dropped, the chips field does not necessarily receive focus when chips are moved around. This results in chips being visibly moved, but the form control value does not get updated. Since order generally matters for chips that can be dragged and dropped, a user could get the desired order visually, while a different order gets persisted upon submission.

### Reproduction

StackBlitz link: https://stackblitz.com/edit/angular-material-chips-bug-f6octd?file=src%2Fmain.ts
Steps to reproduce:
1. Create a required chips field followed by a submit button conditionally enabled by the validation of the preceding field
2. Focus on chips input
3. Select option or type out input
4. Hit **Enter** key on keyboard
5. Hit **Tab** key on keyboard

### Expected Behavior

The submit button should receive focus because it is enabled after hitting **Enter** in the chips field. The chips form control value should be updated immediately when a chip is created.

### Actual Behavior

The submit button does not receive focus.

### Environment

- Angular: 16.2.12
- CDK/Material: 16.2.11
- Browser(s): Tested in Chrome and Firefox, likely reproducible in others
- Operating System (e.g. Windows, macOS, Ubuntu): Tested in Windows, likely reproducible in others

Guida per i contributori

Apri la guida per i contributori

Direzione di ricerca

Inizia con la riproduzione StackBlitz collegata in src/main.ts e traccia il comportamento di aggiornamento di form-control di MatChipGrid. Confronta gli scenari Enter, Tab e trascinamento con l’immediata propagazione prevista del valore e il comportamento del focus. Il lavoro è completato quando il valore del controllo e lo stato del pulsante dipendente si aggiornano immediatamente senza richiedere la perdita del focus.

Scritto dal modello di indicizzazione a partire dal testo della issue.

Valutazione

Stack tecnologico
angular, typescript
Ambito
frontend
Tipo di issue
Bug
Difficoltà
3/5
Tempo stimato
1-2 giorni
Stato di attività
Ferma
Chiarezza
Abbastanza chiara
Idoneità per principianti
42/100

Ricevi le nuove issue nella tua casella

Un breve riepilogo di issue GitHub adatte ai principianti.