이 문서를 언급한 문서들2Realm Shim... of the [Realm API Proposal](https://github.com/tc39/proposal-realms/#ecmascript-spec-proposal-for-realms-api) (ShadowRealm)2022-06-26- Let's not explore ShadowRealm and `iframe` Sandbox for now.ShadowRealm tc39/proposal-shadowrealm: ECMAScript Proposal, specs, and reference implementation for Realms