The spec seems inconsistent about the metadata property. The define() function of Loader accepts options.metadata:
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26.3.3.2Reflect.Loader.prototype.define ( name, source [ , options ] )
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8. Let metadata be GetOption(options, "metadata").
9. ReturnIfAbrupt(metadata).
10. If metadata is undefined then let metadata be ObjectCreate(%ObjectPrototype%).
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But the import() function does not:
Reflect.Loader.prototype.import ( name [ , options ]
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4. Let p be the result of calling LoadModule(loaderRecord, name, options).
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15.2.4.1LoadModule(loader, name, options) Abstract Operation
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8 Let metadata be ObjectCreate(%ObjectPrototype%).
That means I can pass .metadata to define() but not import(). I think the metadata should be passed on both.
concerns old module spec.