Runtime APIs

The Workers runtime is designed to be JavaScript standards compliant and web-interoperable. Wherever possible, it uses web platform APIs, so that code can be reused across client and server, as well as across WinterCG JavaScript runtimes.

The Workers runtime also implements a subset of Node.js APIs as an optional, opt-in compatibility layer.

• Bindings (env)
• Cache
• Console
• Context (ctx)
• Encoding
• EventSource
• Fetch
• Handlers
• Headers
• HTMLRewriter
• Node.js compatibility
• Performance and timers
• Remote-procedure call (RPC)
• Request
• Response
• Streams
• TCP sockets
• Web Crypto
• Web standards
• WebAssembly (Wasm)
• WebSockets