angular / angular/components

bug(COMPONENT): CDK Virtual Scroller jump back/flickers to items on top

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#27,104 29 commentaires 5 réactions 0 personnes assignées Voir sur GitHub
area: cdk/scrolling P3
Langage dominant
TypeScript
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Merge moyen
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Description

### 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

I'm getting an annoying behaviour while scrolling, where items snap/jump back and I'm never able to scroll all the way down the end of the list. I've notice though, that this bug happens only when I use the virtual scrolling within a material dialog

Template

```




  • {{scan.value.name}}



  • ```

    CSS

    `
    .scroll-viewport {
    height: 200px;
    }
    `

    ### Reproduction

    - Implement **cdk-virtual-scroll-viewport** scroller **inside a Angular Material dialog**
    - in the template set **templateCacheSize:0**
    - try to scroll down

    ### Expected Behavior

    https://github.com/angular/components/assets/6199235/63111f97-c665-4cc0-8f8b-eead8d75a025

    ### Actual Behavior

    While scrolling down, the scroll jump up to the first times

    ### Environment

    - Angular: ~11.2.14
    - CDK/Material: ~11.2.13
    - Browser(s): Chrome
    - Operating System (e.g. Windows, macOS, Ubuntu): macOs Catalina

    Guide de contribution

    Ouvrir le guide de contribution

    Piste de recherche

    Reproduce the issue with cdk-virtual-scroll-viewport inside an Angular Material dialog, using templateCacheSize:0 and the provided 200px viewport. Trace the virtual scrolling and dialog behavior while scrolling downward. Done means the list can be scrolled to the end without jumping back to the first items or flickering.

    Rédigé par le modèle d'indexation à partir du texte de l'issue.

    Évaluation

    Stack technique
    angular, typescript
    Domaine
    frontend
    Type d'issue
    Bug
    Difficulté
    4/5
    Temps estimé
    3-5 jours
    Activité
    Calme
    Clarté
    Plutôt claire
    Accessibilité débutants
    48/100

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