Sharing "complex" Data between .wasm Module and Javascript.

[mergintaim]

So I have a C++ Applikation(it visualizes some data, running once natively and once using emscripten to run it in the browser) that I build straight to wasm via the "-o *.html" flag. On this website I am using some custom JS Code to retrieve and sanitize some data and I am left with an array of ints, floats and string variables. It already has the same size and makeup as the corresponding struct on the C++ side. How can I share this data easily between the JS in the browser and the .wasm in the browser.

The struct on the C side looks like this, just a lot more variables per datapoint:

typedef struct
{
int sample;
char timestamp[20];
char characteristics;
int pollrate;
float temperature;
float lux;
char sys_name[64];
} datapoint;

I am guessing I have to write a function that accesses the memory used by Javascript and then using offsets(by knowing the datatype and size in the JS/Browser Memory) but I was thinking there might be an easier way I am not seeing. However so far I have had no luck actually finding the correct "array" in the browser memory to find the right offsets/adresses.

I am sorry if this is too basic(I am a student) or not in the scope of this project.

[sbc100]

There are several ways to communicate data between JS and WebAssembly. They are documented here:
https://emscripten.org/docs/porting/connecting_cpp_and_javascript/Interacting-with-code.html