4.0.0

Blazor Bootstrap v4.0.0

Blazor Bootstrap v4.0.0 is a major release with new components, a streamlined charting architecture, improved upload and document workflows, and expanded documentation.

⚠️ Breaking Changes

• .NET 6 is no longer supported. Blazor Bootstrap now targets .NET 8, .NET 9, and .NET 10.
• Chart components have moved to [BlazorExpress.ChartJS](https://github.com/BlazorExpress/BlazorExpress.ChartJS). BarChart, LineChart, DoughnutChart, PieChart, PolarAreaChart, RadarChart, and ScatterChart are no longer included in Blazor.Bootstrap.

✨ New Components

• RichTextEditor — Built-in rich text editor with formatting, lists, links, and image-upload support; no third-party dependency. [#1302](#1302), [#1308](#1308)
• FileInput and DragAndDropFileInput — Standard file-picker and drag-and-drop upload experiences, including validation support. [#1293](#1293)
• SplitView — Resizable horizontal or vertical two-pane layout. [#1283](#1283)
• OTPInput — Verification-code input with individual digit fields and automatic focus progression. [#1238](#1238)

🚀 Improvements

• PdfViewer now supports downloading the displayed PDF, manual zoom controls, and improved password-prompt cancellation handling. [#1277](#1277), [#1288](#1288), [#1255](#1255)
• ToastService adds asynchronous ShowAsync overloads and a concise ToastMessage(ToastType) constructor.
• ConfirmDialog improves keyboard accessibility with native Blazor handling for Yes-button focus. [#1259](#1259)
• EnumInput supports resource-backed and custom display names for enum values.
• Layout adds --bb-sticky-header-z-index for sticky-header layering customization. [#1311](#1311)
• Google Map improves script loading, marker customization, and demos. [#1292](#1292)

🐛 Fixes

• Fixed Grid rendering and page-size reset issues.
• Improved Sidebar and Sidebar2 behavior on mobile devices. [#1203](#1203)
• Dropdowns now close when clicking outside the component. [#1251](#1251)
• Corrected the SortableList grab cursor. [#1253](#1253)
• Corrected the TooltipColor.Secondary CSS class name. [#1257](#1257)
• Improved CurrencyInput copy/paste keyboard handling. [#1205](#1205)

📚 Documentation

• Expanded API metadata and XML documentation across the component library, improving IntelliSense and generated API reference material.
• Added documentation and demos for RichTextEditor, file-upload components, SplitView, and the new chart integration.
• Refreshed getting-started guidance for supported .NET versions.

New Contributors

• @koss054 made their first contribution in #1262
• @olufemioyedepo made their first contribution in #1277
• @MarcoBellini made their first contribution in #1203
• @kyle-poff made their first contribution in #1205

Upgrade Guidance

dotnet add package Blazor.Bootstrap --version 4.0.0

Before upgrading:

1. Target net8.0, net9.0, or net10.0.
2. Move any chart implementation to BlazorExpress.ChartJS.
3. Build and test your application.

Apart from the target-framework and charting changes above, existing Blazor Bootstrap component APIs remain compatible with v3.x.

Full Changelog: v3.5.0...v4.0.0