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BridgeJS: @JS Protocol with methods support#456
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October 17, 2025 15:11
[fe09c4b1] Simplify export swift [b42bb7c1] WIP: Simplify protocol method generation [75e1ed37] BridgeJSLink simplification [b1fcc4d0] Cleanup [70aa0332] WIP: Final wrap [2f648eaf] WIP: Protocols simplification [f2f89b33] WIP: Fix for parameters in methods [6026fc1d] WIP: Test protocol methods with parameters
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October 17, 2025 16:18
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Introduction
This PR adds basic support for exporting Swift protocols to JS / TS using BridgeJS plugin.
Overview
BridgeJS now supports exporting Swift protocols as TypeScript interfaces. JavaScript objects implementing these interfaces can be passed to Swift code, where they are automatically wrapped in generated Swift struct that forward method calls and property accesses to the JavaScript implementation.
When you mark a protocol with
@JS, BridgeJS generates:Any{ProtocolName}) that conforms to the protocolCurrent Limitations
This PR covers support for methods and basic types in parameters and return types, as these types are supported in both Export / Import directions.
Support for properties,
Optionaland others will be posted in separate PR as changeset is quite large.Testing
Basic tests with protocol implementation on JS and Swift side used as delegate property of protocol type are added.
Documentation
Added to
Sources/JavaScriptKit/Documentation.docc/Articles/BridgeJS/Exporting-Swift/Exporting-Swift-Protocols.md