> IIUC JavaScript has something similar for `this.#x`. Although this is implemented much more robustly and doesn't rely on unique class names and I believe is a

> IIUC JavaScript has something similar for `this.#x`. Although this is implemented much more robustly and doesn't rely on unique class names and I believe is actually "secure" as in no other class can gain access. But I am not up-to-date on JS reflection abilities. The code desugars to something like `const X_PROP = new Symbol()` created once-per-class and accessible only to the class itself, then the accesses become something like `this[X_PROP]`. Documentation: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/Private_properties https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe... TL;DR it's a language feature, there's no reflection and it's not a syntax sugar for `new Symbol()`. It's actually implemented as a _syntax_ error to access the private member outside the class, which is made possible by using a sigil `#`