API Reference

This section lists Emscripten’s public API, organised by header file. At a veryhigh level it consists of:

• emscripten.h:APIs for integrating with the browser environment.

• html5.h:Low level glue bindings for interfacing with HTML5 APIs from native code.

• console.h:Functions to writing to the console and stdout/stderr.

• preamble.js:APIs for working with compiled code from JavaScript.

• File System API (library_fs.js):APIs for managing file systems and synchronous file operations.

• Fetch API:API for managing accesses to network XHR and IndexedDB.

• Wasm Workers API:Enables writing multithreaded programs using a web-like API.

• Wasm Audio Worklets API:Allows programs to implement audio processing nodes that run in a dedicated real-time audio processing thread context.

• Module object:Global JavaScript object that can be used to control code execution and accessexported methods.

• val.h:Embind API to support transliteration of JavaScript code to C++.

• bind.h (under-construction):Embind API for binding C++ functions and classes so that they can be calledfrom JavaScript in a natural way.

• trace.h:A tracing API for doing memory usage analysis.

• fiber.h:API for working with Fibers (co-operative threads)

• proxying.h:API for synchronously or asynchronously proxying work to a target pthread.

• stack.h:Inspecting the WebAssembly data stack.

• Advanced APIs:APIs for advanced users/core developers.