Array.prototype.sort was already made stable in ECMAScript 2019 (see two paragraphs above). The change in https://github.com/tc39/ecma262/pull/1585 made Array.prototype.sort more precise, reducing the amount of cases that result in an implementation-defined sort order.

[MRGRAY0000]

Array.prototype.sort was already made stable in ECMAScript 2019 (see two paragraphs above). The change in tc39/ecma262#1585 made Array.prototype.sort more precise, reducing the amount of cases that result in an implementation-defined sort order.

Originally posted by @mathiasbynens in tc39/ecma262#2342

[pcihon]

Hi @MRGRAY0000, I'm closing this as off topic. Please see our Contributing.md for the types of feedback we're looking for on our Site Policies in this repo.