angular / angular/components

bug(mat-dialog): element with fixed position jumps when dialog opens.

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#23,851 7 comments 1 reaction 0 assignees View on GitHub
area: cdk/overlay P4
Dominant language
TypeScript
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Avg merge
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Description

#### Reproduction

Use StackBlitz to reproduce your issue:
- Components: https://stackblitz.com/edit/angular-eyckbt?file=src/app/dialog-overview-example-dialog.html

Steps to reproduce:
1. Just open dialog which contains element with fixed position inside it.


#### Expected Behavior
Element is positioned correctly when dialog opens.

#### Actual Behavior
Element jumps from one position to correct one.
![fixed_element_jump_in_dialog](https://user-images.githubusercontent.com/32300784/139259476-f0b4f31d-9037-42eb-a975-564b4c4cf41f.gif)

#### Environment

- Angular: in stackblitz link
- CDK/Material: in stackblitz link
- Browser(s): Chrome v94
- Operating System (e.g. Windows, macOS, Ubuntu): Windows 10 latest

Contributor guide

Open the contributing guide

Research direction

Start with the linked StackBlitz reproduction and inspect src/app/dialog-overview-example-dialog.html, then reproduce the jump in Chrome v94 when opening the dialog. Trace the dialog's positioning behavior for the fixed-position element; done means the element is correctly positioned immediately when the dialog opens without regressing other dialog behavior.

Written by the indexing model from the issue text.

Assessment

Tech stack
angular, typescript
Domain
frontend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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