Sohu Tech Products

Sep 28, 2022 · Fundamentals

New ECMAScript 2023 Array Proposals: Non‑Destructive Methods, Grouping, Find‑From‑Last, and fromAsync

The article explains the upcoming ECMAScript 2023 proposals—including non‑destructive array methods (toReversed, toSorted, toSpliced, with), array grouping (group, groupToMap), reverse‑search methods (findLast, findLastIndex), and the asynchronous constructor Array.fromAsync—detailing their stages, usage examples, polyfills, and type signatures for modern JavaScript development.