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FAQ
A: Here is a longer version. In short, Napa.js provides a multi-threaded JavaScript programming model that enables developers to write computation heavy code in JavaScript, without blocking Node event loop.
You should use it when:
- CPU bound logic that may block Node event loop
- Complex workflow that may involve parallel execution of JavaScript code
module.js:597
return process.dlopen(module, path._makeLong(filename));
^
Error: libnapa.so: cannot open shared object file: No such file or directory
A: It's a known issue in Napajs v0.1.13. Please refer to Issue #80 for workaround and updates.
/usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.22' not found
A: You didn't install the latest libstdc++6 libraries. Use the following command to install:
sudo apt-get install libstdc++6
Note: this issue only happens when you are using the pre-built binaries. You do not have to depends on libstdc++6 if you build napajs by yourself.
Q: I have Visual Studio 2015/2017 installed, why did npm install napajs fail with following message: ""
A:
A: Yes and No. Napa.js support modules in the same way as Node.js does, but at present Napa.js doesn't support all Node.js built-in and core modules. If the module you want to use doesn't depend (directly or indirectly) on them, then you can use it, otherwise you cannot.
A: In JavaScript, each thread has its own heap, so you cannot access variable from different JavaScript thread. But, there are two ways you can communicate between JavaScript threads.