Array find from last proposal moved to the stage 3, July 2021 TC39 meeting Array filtering stage 1 proposal: Array.prototype.filterReject replaces Array.prototype.filterOut %TypedArray%.prototype.filterReject replaces %TypedArray%.prototype.filterOut Added Array grouping stage 1 proposal: Array.prototype.groupBy %TypedArray%.prototype.groupBy Work with symbols made stricter: some missed before cas