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With the January meeting of TC39 behind us, the Stage-4 features that will make it into ES2021 have been selected. The following features will be part of ES2021, which will be formalised mid-2021: String.prototype.replaceAll Promise.any WeakRefs + FinalizationRegistry Logical Assignment Operators Numeric Separators Apart from the linked-to posts above, Pawel Grzybek has done a writeup …