[Brazil Investigation] JavaScript Syntax in Server Scripts: What Works and What Doesn't in ES12 Mode

After a major upgrade to Brazil, is it safe to use ?., ??, and class in server scripts? The official release notes only state ...
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gvarados on X: "I've been working on more optimizations for MineMogul after converting to Box3D physics. 6300 physics objects: PhysX (original) - 1 FPS Box3D (current) - 28 FPS ...

MineMogul developer https://t.co/GeNXKT7Udq VR + s&box stuff sometimes too https://t.co/TRZ5QC8yAN ...