• Source

JsPointerToString(NULL, 0, &str);

• Expected
  str = empty string

• Actual
  failed and returns JsErrorNullArgument

I think this should be possible

ECMASCript feature

Implement Symbol.prototype[ @@toPrimitive ]( hint ).

The to primitive function described in spec can be created with FunctionBuilder and it can be added to Symbol.prototype with ConstructorBuilder::property() method.

Ref: https://github.com/napi-bindings/quickjs-build/releases

copy_dir is quite outdated and tends to introduce a duplicate dependency on walkdir.

We can either ship a compressed version of the code, which is then uncompressed instead of copying the source directory.
Or switch to a different dependency like fs-extra.

See libquickjs-sys/build.rs.