This directory contains tests related to the ECMA-262 and ECMA-402 specifications.

Although these specifications are already covered through Test262, occasionally it’s useful to have Web Platform Tests coverage for a subset of ECMAScript functionality. Examples include:

• Any functionality that ECMAScript specifies as “implementation-defined” despite Web Compatibility requiring specific semantics. (example)
• Any ECMAScript functionality that needs to be reported via wpt.fyi (for example, because it’s included in Interop 2023).