There is no standard, import.meta is host-defined: 13.3.12.1.1 HostGetImportMetaProperties ( moduleRecord ) The host-defined abstract operation HostGe

There is no standard, import.meta is host-defined: 13.3.12.1.1 HostGetImportMetaProperties ( moduleRecord ) The host-defined abstract operation HostGetImportMetaProperties takes argument moduleRecord (a Module Record) and returns a List of Records with fields [[Key]] (a property key) and [[Value]] (an ECMAScript language value). It allows hosts to provide property keys and values for the object returned from import.meta. https://tc39.es/ecma262/#sec-hostgetimportmetaproperties https://tc39.es/ecma262/#sec-hostgetimportmetaproperties