bug(material/chips): MatChipSelectionChange not emitting on certain deselections
- 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
`selectionChange` output for `MatChipOption` is [stated to be](https://material.angular.io/components/chips/api#MatChipOption):
> Emitted when the chip is selected or **deselected**.
But this is not true for deselection. It appears the event is only emitted for deselection when **the chip in question** is manually selected/toggled by the user. When the `MatChipListbox` is **in single-select mode and a chip is currently selected**, selecting a different chip means the prior chip is deselected --> deselecting should mean emitting the `selectionChange` event, but it is not happening in this scenario.
See the below StackBlitz link.
### Reproduction
StackBlitz link: https://stackblitz.com/edit/firqg1
Steps to reproduce:
(First chip is initially selected)
1. Click on the Second chip.
2. First chip becomes deselected, but no `selectionChange` output event was emitted (in this case, the `MatChipSelectionChange` object should be logged to the console).
### Expected Behavior
`selectionChange` output for the First chip should have emitted.
### Actual Behavior
`selectionChange` output for the First chip does not emit.
### Environment
- Angular: 16
- CDK/Material: 16.2.7 (latest)
- Browser(s): Chrome
- Operating System (e.g. Windows, macOS, Ubuntu): Windows
Guida per i contributori
Apri la guida per i contributori
Direzione di ricerca
Apri la riproduzione StackBlitz collegata e analizza il comportamento di selezione di MatChipOption e MatChipListbox descritto nell’issue. Verifica il percorso di deselezione in single-select quando selezioni il secondo chip; il lavoro è completato quando il primo chip emette il suo evento MatChipSelectionChange quando viene deselezionato.
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
- 45/100