1304530 - Array static methods not in spec

Status: RESOLVED DUPLICATE of bug 1222547

(Core :: JavaScript Engine, defect)

Description

[Jonathan Kingston [:jkt] he/him]

Methods like: Array.pop(), .slice() .reverse() don't appear to be defined in the specification and only .from() .of() and .isArray().

Greg pointed out on twitter he wasn't aware of methods that we implement: https://twitter.com/KingstonTime/status/778715768305221633

These are not available in Chrome nor appear to be in the latest spec: https://tc39.github.io/ecma262/#sec-array.from

Could someone sanity check the ECMA spec and see if this is an issue? Are they defined elsewhere?

Comment 1

[Jeff Walden [:Waldo]]

They're an old SpiderMonkey-only extension.  We hope to remove them eventually.  In the meantime, don't use them.