# ContentBuilder A custom parameter attribute that constructs views and other content types from closures. ``` typealias ContentBuilder = ViewBuilder ``` ## Discussion You apply `ContentBuilder`, a type alias for [`ViewBuilder`](/documentation/SwiftUI/ViewBuilder), as a parameter attribute to closure parameters, computed properties, or protocol requirements. Then, SwiftUI builds content from multiple statements in the closures you provide. For example, the following `contextMenu` function accepts a closure that produces one or more views from the content builder. ```swift func contextMenu( @ContentBuilder menuItems: () -> MenuItems ) -> some View ``` You can use multiple-statement closures to provide several subviews, as the following example shows: ```swift myView.contextMenu { Text("Cut") Text("Copy") Text("Paste") if isSymbol { Text("Jump to Definition") } } ``` You can also use `ContentBuilder` with other SwiftUI-style result builders. For example, the following computed property iterates over cases in an enumeration to produce toolbar items. ```swift @ContentBuilder var editingToolbarItems: some ToolbarContent { ForEach(EditingOptions.toolbarItems, id: \.self) { editingOption in ToolbarItem { Button(editingOption.title) { editingOption.action() } } } } ``` SwiftUI constructs type-agnostic content from closures that you mark with `ContentBuilder`, which serves as the unified replacement for type-specific builders like [`ToolbarContentBuilder`](/documentation/SwiftUI/ToolbarContentBuilder) and [`CommandsBuilder`](/documentation/SwiftUI/CommandsBuilder). In its build functions, `ContentBuilder` doesn’t enforce protocol conformance. Instead, it maintains type safety through conditional conformances on the content types it produces. For example, [`TupleContent`](/documentation/SwiftUI/TupleContent) conditionally conforms to content types based on which types the content items it contains conform to. This allows a single, shared set of initializers on [`Group`](/documentation/SwiftUI/Group), [`ForEach`](/documentation/SwiftUI/ForEach), and [`Section`](/documentation/SwiftUI/Section) to serve all content types, rather than a separate overloaded initializer per builder. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)