This proposal extends the WeakMap API to allow usage of unique Symbols as keys. Currently, WeakMaps are limited to only allow objects as keys, and this is a limitation for WeakMaps as the goal is to ...

The need to manually dispose() meshes, geometries, materials, and textures is quite annoying, and according to this stackexchange comment, is a concequence of the lack of WeakMaps in javascript. Now ...