GoogleChromeLabs/comlink
Comlink
Comlink is a remote procedure call library that transforms message-based communication into asynchronous function calls between the main thread and web workers. It provides a proxy-based interface that allows multiple threads to interact with a single object instance without manual message handling.
The project enables the execution of functions across separate browser windows, iframes, and web workers, making external calls behave like local asynchronous operations. It supports the transfer of non-cloneable data through custom serialization handlers and allows for the movement of ownership for transferable objects to avoid data cloning.
The library also includes mechanisms for resource management, such as proxy lifecycle detachment to trigger garbage collection and finalizer cleanup logic.
Features
- Proxy-Based Interfaces - Uses JavaScript Proxy objects to intercept method calls and wrap them in asynchronous messages sent across a channel.
- Complex Data Serialization - Transfers non-cloneable data across thread boundaries using custom serialization handlers.
- Remote Procedure Execution - Allows executing functions on a different thread as if they were local asynchronous operations.
- Cross-Thread - Provides a serialization layer for transferring non-cloneable data and transferable objects across thread boundaries.
- Remote Object Proxies - Provides proxies that forward method calls to remote worker targets and return promises.
- Background Thread Dispatchers - Routes heavy tasks to background workers to keep the main thread responsive.
- Browser Function Invocations - Invokes functions and objects on a web worker from the main thread using asynchronous interfaces.
- Main Thread Offloading - Optimizes browser performance by offloading heavy computations to background threads to maintain a smooth UI.
- MessageChannel Bridges - Uses the browser MessageChannel API to enable bidirectional communication between workers and iframes.
- Complex Object Serializers - Provides custom serialization handlers to transfer non-cloneable complex objects across thread boundaries.
- WebWorker RPC Libraries - Transforms message-based communication into asynchronous function calls between the main thread and web workers.
- Remote Object Proxies - Passes a proxy of a value instead of a copy to allow multiple threads to interact with a single object instance.
- Embedded and Browser Bridge Protocols - Facilitates communication between isolated execution environments like iframes and browser windows.
- Remote Promise Messaging - Implements a messaging system that maps remote responses to local promises using unique request identifiers.
- Proxy-Based Shared State - Enables multiple threads to interact with a single object instance using proxies instead of copying data.
- Ownership Transfer - Passes ownership of large buffers via the postMessage transfer list to avoid expensive data cloning.
- Cross-Window Communication Layers - Establishes communication channels between separate browser windows or iframes using RPC patterns.
- Web Worker Management - Simplifying postMessage communication with workers.
