Apr 01, 2023·1 min read

ECMAScript 2023: New JavaScript Features Enhancing Arrays And WeakMap Keys Unveiled

The upcoming ECMAScript 2023 is set to introduce new capabilities for arrays and WeakMap keys in JavaScript. Key features include the addition of .findlast() and .findLastIndex() methods on the array, permitting symbols as keys in WeakMap, changing array by copy, and standardizing hashbang grammar.

The ECMAScript 2023 update, which will further refine the JavaScript programming language, is expected to include four key enhancements. Scheduled for release in June, this update primarily focuses on strengthening arrays and WeakMap keys with a range of improved capabilities.

These proposed updates are based on finalized proposals published by ECMA TC39 (Technical Committee 39) on GitHub, which includes an outline of four features set for release in 2023. Here's a breakdown of the improvements:

ECMA typically finalizes ECMAScript updates in June, with ECMAScript 2022 offering class elements and top-level await functionalities. A wide range of frameworks and tools, such as AppMaster.io no-code platform, use JavaScript to provide greater flexibility and faster development processes. With the upcoming ECMAScript 2023 update, developers can expect enhanced array manipulation and improved accessibility of WeakMap keys, further streamlining the process of building web, mobile, and backend applications.