There is an automatic mapping scheme between Qt/C++ types and javascript types. See the page you quoted in your first post for details.
There is an automatic mapping scheme between Qt/C++ types and javascript types. See the page you quoted in your first post for details.
It's likely that something is not registered somewhere. It's really hard to say anything useful if you just keep sending unrelated pieces of code. Provide a minimal compilable example reproducing the problem.
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