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@ArgoZhang ArgoZhang commented Sep 29, 2025

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fixes #6730

Summary By Copilot

Regression?

  • Yes
  • No

Risk

  • High
  • Medium
  • Low

Verification

  • Manual (required)
  • Automated

Packaging changes reviewed?

  • Yes
  • No
  • N/A

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

  • Doc is updated/provided or not needed
  • Demo is updated/provided or not needed
  • Merge the latest code from the main branch

Summary by Sourcery

Add support for backdrops in multiple-dialog mode by injecting a backdrop element for secondary dialogs and adjusting CSS stacking via a custom z-index property.

Bug Fixes:

  • Restore backdrop display for additional modals when multiple dialogs are open.

Enhancements:

  • Add .modal-multiple CSS rules with a --bb-backdrop-zindex variable to manage backdrop and dialog stacking.
  • Render an extra
    before the last dialog instance in Dialog.razor.

Copilot AI review requested due to automatic review settings September 29, 2025 04:27
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sourcery-ai bot commented Sep 29, 2025

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Enable proper backdrop layering when multiple modals/dialogs are open by introducing a modifier class with custom z-index handling in styles and rendering an extra backdrop element before the last dialog instance.

Class diagram for updated modal and dialog structure

classDiagram
    class Modal {
    }
    class Dialog {
        +DialogParameters
        +RenderDialog(index, key)
    }
    Modal <|-- Dialog
    class "modal-multiple" {
        +--bb-backdrop-zindex
    }
    Dialog --> "modal-multiple" : uses
    class "modal-backdrop" {
    }
    "modal-multiple" --> "modal-backdrop" : contains
    "modal-backdrop" --> Modal : rendered before last dialog
Loading

File-Level Changes

Change Details Files
Introduce .modal-multiple modifier with custom backdrop z-index in styles
  • Add .modal-multiple class with CSS variable --bb-backdrop-zindex
  • Remove legacy pseudo-element backdrop definitions under .modal-multiple .modal-dialog
  • Hide default sibling backdrop (~ .modal-backdrop) and style custom backdrop with z-index
  • Ensure the dialog following a custom backdrop inherits the same z-index
src/BootstrapBlazor/Components/Modal/Modal.razor.scss
Render an extra backdrop element for multiple dialogs
  • Insert a conditional check in Dialog.razor to output <div class="modal-backdrop fade show"></div> before the last dialog when more than one is open
src/BootstrapBlazor/Components/Dialog/Dialog.razor

Assessment against linked issues

Issue Objective Addressed Explanation
#6730 Fix the bug where, in multi-level dialogs, setting IsDraggable=false on a child dialog causes its IsBackdrop property to not work (i.e., the backdrop is not shown and cannot be clicked to close the dialog).

Possibly linked issues


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Getting Help

@bb-auto bb-auto bot added bug Something isn't working investigation Investigation in progress labels Sep 29, 2025
@bb-auto bb-auto bot added this to the 9.10.0 milestone Sep 29, 2025
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Pull Request Overview

This PR fixes backdrop display issues in multiple dialog mode by restructuring the CSS and adding proper backdrop elements. The fix ensures that modal backdrops are correctly managed when multiple dialogs are present.

  • Refactored CSS to use CSS custom properties for z-index management in multiple dialog scenarios
  • Added conditional backdrop element rendering for multiple dialogs
  • Removed pseudo-element approach in favor of proper backdrop HTML elements

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File Description
Modal.razor.scss Restructures CSS for multiple modal backdrops using CSS variables and proper z-index management
Dialog.razor Adds conditional backdrop HTML element rendering for multiple dialog scenarios

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sourcery-ai[bot]
sourcery-ai bot previously approved these changes Sep 29, 2025
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Hey there - I've reviewed your changes and they look great!

Prompt for AI Agents
Please address the comments from this code review:

## Individual Comments

### Comment 1
<location> `src/BootstrapBlazor/Components/Modal/Modal.razor.scss:102-99` </location>
<code_context>
+    z-index: var(--bb-backdrop-zindex);
+}
+
+.modal-multiple .modal-backdrop + .modal-dialog {
+    z-index: var(--bb-backdrop-zindex);
+}
+
</code_context>

<issue_to_address>
**suggestion (bug_risk):** Assigning the same z-index to both backdrop and dialog may cause stacking issues.

Increase the dialog's z-index so it reliably appears above the backdrop.
</issue_to_address>

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codecov bot commented Sep 29, 2025

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (7f68e2e) to head (8db1f89).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files
@@            Coverage Diff            @@
##              main     #6807   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          739       739           
  Lines        31748     31751    +3     
  Branches      4464      4465    +1     
=========================================
+ Hits         31748     31751    +3     
Flag Coverage Δ
BB 100.00% <100.00%> (?)

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@ArgoZhang ArgoZhang enabled auto-merge (squash) September 29, 2025 04:31
@ArgoZhang ArgoZhang disabled auto-merge September 29, 2025 04:31
@ArgoZhang ArgoZhang merged commit 73f133a into main Sep 29, 2025
5 checks passed
@ArgoZhang ArgoZhang deleted the fix-dialog branch September 29, 2025 04:31
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Successfully merging this pull request may close these issues.

bug(Dialog): 多级弹窗如果设置IsDraggable 为false 则子级的弹窗的IsBackdrop不正常

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