Reflect.hasField returns false on property getters on the JavaScript target about haxe

[back2dos]

On the JavaScript target, enabling full DCE actually causes getProperty('myField') to fail, presumably because the getter function is getting culled. Getter and setter functions should definitely never get culled if the class itself has not been culled.

DCE is granular at field level by design.

If anything, the argument could be made that Reflect.getProperty should keep all properties on kept classes.

If you can, avoid reflection like the plague. More often than not, safer and faster alternatives are available. If not, you could either use addGlobalMetaData to whatever packages you wish with to perform reflection on, or add an onGenerate hook that marks all getters and setters with @:keep.

Additionally, there could be a Reflect.properties and Reflect.hasProperty. Made a JS implementation here: https://try.haxe.org/#5611215a

That said, I would yet again advise against using such a thing though ;)