ECMAScript 2023, due in June, is set to add new methods for searching and changing arrays, allow symbols to be used as WeakMap keys, and standardize support for hashbang grammar.

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ECMAScript 2023 spec for JavaScript adds methods for arrays and WeakMap keys. The next planned update to the official specification for the JavaScript programming language is slated to add four capabilities in areas such as arrays. The finished proposals are published by the ECMA TC39 (Technical Committee 39) on GitHub.