ShadowRealm

HTML Integration and Stage 2 Updates

Leo Balter, Sr. Product Manager�@leobalter | leobalter@salesforce.com�He/Him

WIP with Igalia

A huge thanks to everyone involved!

Work is in progress — Salesforce continues sponsoring work being done with Igalia to eventually meet requirements for Stage 3.

​

• Overview of the V8 Implementation
• Small improvements to the ES proposal spec
• HTML Integration
• Implementation in WebKit

​

Overview of the V8 Implementation

Feedback from the V8 team:

• ShadowRealm is code-complete as far as V8 goes
• Waiting on the Blink integration/WHATWG to determine which APIs should be included.
• exposed=* usage for now
• Blink has made some progress in creating a snapshot for shadow-realm.

​

​

HTML Integration

• (Evergreen) HTML integration PR rebase.
• New PR: WhatWG/html#9893
• Spec Refactor to align with the new Modules integration.
• Discussed approach to module loading with Nicolò Ribaudo and Dan Ehrenberg, and started drafting improved spec text.
• Landed some preliminary editorial changes to the HTML specification (PR #9872).
• SES Discussions: Host integration changes for CSP unsafe-eval protection
• Discussed CSP HostEnsureCanCompileStrings change with ECMA-262 editors
• Submitted rebased HostEnsureCanCompileStrings PR #3222 (separate item/discussion) in the plenary agenda)

​

​

​

WebKit Implementation

• Updates on WPT
• Testing current implementation against (updated) WPT and Test262
• Coverage Review for APIs exposed in a ShadowRealm
• Continue work on previous related WebKit pull requests
• Continued QA on rebased branches for the WebKit implementation

​

​

​

Moving forward

• HTML Integration
• End goal: list of APIs exposed in a ShadowRealm
• Global object setup rewrite
• HostEnsureCanCompileStrings follow ups: ECMA-262 and CSP.
• WebKit Implementation
• Address review comments on open WebKit PRs
• Continued rebasing for branch QA
• Continued coverage reviews for WPT+Test262

​

Any questions or comments?

​

​

​

​

• Thank you