Interacting with code — Emscripten 4.0.15-git (dev) documentation

Interacting with code Emscripten provides numerous methods to connect and interact between JavaScript and compiled C or C++: Call compiled C functions from normal JavaScript: Using ccall or cwrap. Using direct function calls (faster but more complicated). Call compiled C++ classes from JavaScript using bindings created with: Embind or WebIDL-Binder Call JavaScript functions from C/C++: Using emsc

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“The int_sqrt() function to be compiled is wrapped in extern "C" to prevent C++ name mangling.”