Increase the lifetime of function arguments (clone handles?) about quickjs-emscripten HOT 1 CLOSED

Memory management / lifetime management is the most troublesome aspect of this library. I've pondered a "pool" or "arena" abstraction in native javascript land, but didn't find a design with satisfying ergonomics.

For now, you might try storing your borrowed QuickJS handles on an object you own inside the the QuickJS runtime. Like so:

const box = vm.createObject()
const fnHandle = vm.createFunction('onComplete', (errorHandle, resultHandle) => {
  if (vm.typeof(errorHandle) === 'undefined') {
    vm.setProp(box, 'value', resultHandle)
  }
})
vm.setProp(vm.global, 'onComplete', fnHandle)
fnHandle.dispose()

If you're interested in implementing something like functionArgumentHandle.toOwned(), I believe it would be possible without writing any C code or installing Emscripten, as we already have two FFI-exposed functions (oops 🤦) that that call down to JS_DupValue to clone a handle, here is the one I'd prefer to use:

from quickjs-emscripten.