In order to pass any other values, you need to convert them manually via corresponding APIs. Like WebAssembly itself, it has a limitation of supporting only numeric arguments and return values. EM_JS in Emscripten lets you declare a C/C++ function that is implemented by a JavaScript snippet. The EM_JS macro lets you move fetch_json to JavaScript. What if you could move fetch_json to JavaScript and reduce the overhead of intermediate steps at the same time? EM_JS macro #
#Java script snippets driver#
C++ code is acting only as a driver for a series of JavaScript operations. Such code doesn't need anything from C++.
#Java script snippets how to#
In this post you’ll learn how to use all of them for similar tasks.
When working on WebAssembly integration with the web, you need a way to call out to external APIs such as web APIs and third-party libraries.