Issues

• Intent-Driven Rendering for ShadowRealm Micro-Frontends

  tc39/proposal-shadowrealm#427 · Filter by author x16lab opened on Sep 27, 2026

• WPT coverage

  tc39/proposal-shadowrealm#425 · Filter by author annevk opened on May 12, 2026

• Spec bug: Thenable module breaks assert

  tc39/proposal-shadowrealm#424 · Filter by author o- opened on Mar 26, 2026

• Spec bug: dynamic import inside a ShadowRealm.evaluate actually import the module in the upper realm.

  tc39/proposal-shadowrealm#423 · Filter by author Jack-Works opened on Nov 27, 2025

• Control, Safety, Performance?

  tc39/proposal-shadowrealm#421 · Filter by author brandon942 opened on Sep 2, 2025
  2

• Pause/freeze realm execution?

  tc39/proposal-shadowrealm#420 · Filter by author foxt opened on Aug 7, 2025
  5

• Use case: MCP servers

  tc39/proposal-shadowrealm#418 · Filter by author kentcdodds opened on Apr 13, 2025
  3

• Use case - Script sandboxing for 3rd party tools

  tc39/proposal-shadowrealm#417 · Filter by author xaviergonz opened on Feb 21, 2025
  1

• Intersection with Dynamic Code Brand Checks proposal

  tc39/proposal-shadowrealm#414 · Filter by author fred-wang opened on Nov 20, 2024

• Considering the impact of ShadowRealm on ad blocking, privacy and similar browser extensions

  tc39/proposal-shadowrealm#406 · Filter by author kzar opened on Jun 7, 2024
  8

• Clarify object/value sharing limitations in explainer

  tc39/proposal-shadowrealm#405 · Filter by author joliss opened on Apr 23, 2024

• Feature Enabling

  tc39/proposal-shadowrealm#404 · Filter by author Autumnlight02 opened on Apr 21, 2024
  1

• Enable writing code directly to be evaluated synchronously

  tc39/proposal-shadowrealm#402 · Filter by author ByteEater-pl opened on Apr 13, 2024
  9

• [Stage 3] Web APIs to be exposed to ShadowRealms

  tc39/proposal-shadowrealm#393 · Filter by author leobalter opened on Jan 22, 2024
  53

  

• ScriptEvaluation semantics for ShadowRealm

  question
  tc39/proposal-shadowrealm#379 · Filter by author mhofman opened on Oct 28, 2022
  5

• importValue: How to import a module with no exports?

  post-mvpquestion
  tc39/proposal-shadowrealm#364 · Filter by author Jack-Works opened on May 26, 2022
  18

• Import assertions

  post-mvpquestion
  tc39/proposal-shadowrealm#351 · Filter by author legendecas opened on Mar 10, 2022
  5

• Cross-realm invocation of async functions & generators

  post-mvp
  tc39/proposal-shadowrealm#344 · Filter by author caitp opened on Dec 17, 2021
  8

• Ergonomics on WrappedFunction thisArgument throwing when it is an object

  needs consensus
  tc39/proposal-shadowrealm#328 · Filter by author legendecas opened on Oct 5, 2021
  33

• Allow passing through (Shared)ArrayBuffer

  post-mvp
  tc39/proposal-shadowrealm#298 · Filter by author Jamesernator opened on Apr 19, 2021
  5

• Consider storing the associated "parent" Realm in an internal slot

  enhancement
  tc39/proposal-shadowrealm#285 · Filter by author littledan opened on Nov 11, 2020
  5

• Which properties should HTML add to Realms' global objects?

  tc39/proposal-shadowrealm#284 · Filter by author littledan opened on Nov 11, 2020
  75

• Should globals from 262's Annex B be part of the intrinsics/stdlib?

  question
  tc39/proposal-shadowrealm#22 · Filter by author caridy opened on Oct 24, 2016
  23

• Path to Stage 4

  tc39/proposal-shadowrealm#4 · Filter by author caridy opened on May 3, 2016
  6