On Tuesday, May 21, 2024 at 1:04:44 PM UTC+2 Yoav Weiss wrote:
Contact emailsyoavwe...@chromium.org Explainerhttps://github.com/guybedford/import-maps-extensions#integrity Specificationhttps://github.com/whatwg/html/pull/10269 The PR is ready to land, but we're holding off on that for 2 weeks at Mozilla's request. See below. Summary Imported ES modules can't currently have their integrity checked, and hence cannot run in environments that require Subresource Integrity or with `require-sri-for` CSP directives. This feature adds an `integrity` section to import maps, enabling developers to map ES module URLs to their integrity metadata, and ensure they only load when they match their expected hashes. Blink componentBlink>Loader <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3ELoader> TAG reviewhttps://github.com/w3ctag/design-reviews/issues/944 TAG review statusIssues addressed Risks Interoperability and Compatibility On the interoperability front, this got a positive position from WebKit, and I'm implementing the feature there <https://github.com/whatwg/html/pull/10269>. Mozilla didn't object to the feature, but asked <https://docs.google.com/document/d/1iaarr4Ho715CUULrvi_LD3TwshAcN2odDLBBEK0FjH0/edit#bookmark=id.li7pdpi5uloq> for a couple more weeks to evaluate it and provide a position, as they might be planning broader-scope work on the front of application integrity, and want to make sure this doesn't collide with it. On the compatibility front, the feature is polyfilled <https://github.com/guybedford/es-module-shims/pull/424>, but it's turned off for browsers that support import maps <https://github.com/guybedford/es-module-shims#:~:text=The%20ES%20Module%20Shims%20polyfill%20will%20analyze%20the%20browser%20to%20see%20if%20it%20supports%20import%20maps.%20If%20it%20does%2C%20it%20doesn%27t%20do%20anything%20more> . Adding Guy Bedford, the polyfill author to this thread. Guy, can you confirm this is the case? *Gecko*: No signal <https://github.com/mozilla/standards-positions/issues/1010> *WebKit*: Support <https://github.com/WebKit/standards-positions/issues/335> WebKit PR <https://github.com/WebKit/WebKit/pull/28253> has landed. *Web developers*: Positive <https://x.com/yoavweiss/status/1778067431417954803> This is based on a proposal from a developer (Guy Bedford). Multiple Shopify properties are interested in this, to enable using ES modules as bundler output in security sensitive environments. Asking about this on twitter and mastodon showed that some developers are interested in this, while others discount SRI in general. *Other signals*: Activation As long as support is not ubiquitous, the `integrity` part of import maps will be ignored in non-supporting browsers, resulting in scripts loading in those browsers even if they're supposed to fail their integrity checks. There's also a polyfill <https://github.com/guybedford/es-module-shims/pull/424> that would enable sites to get integrity support for ES modules in browsers that don't support import maps at all. That's an increasingly slim part of the browser population. WebView application risks Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications? None Debuggability No issues in particular. The feature does emit a few console errors in cases where parsing fails, to help developers debug this. Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?Yes Is this feature fully tested by web-platform-tests <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> ?Yes https://chromium-review.googlesource.com/c/chromium/src/+/5441822 Flag name on chrome://flagsNone Finch feature nameImportMapIntegrity Requires code in //chrome?False Tracking bughttps://issues.chromium.org/issues/334251999 MeasurementNo use-counter was added so far. If one is needed, I can add it when flipping on the flag. I decided to add a usecounter <https://chromium-review.googlesource.com/c/chromium/src/+/5555942>. Availability expectationFeature is available in WebKit within a few months of launch in Chromium, if not before. Still waiting on Mozilla's position and plans. Adoption expectation I expect web developers that want to rely on SRI for ES modules to use the feature directly without requiring the polyfill. Adoption planUpdate MDN <https://github.com/mdn/mdn/issues/541> on the integrity section. MDN PR <https://github.com/mdn/content/pull/33712>. Estimated milestonesShipping on desktop127Shipping on Android127Shipping on WebView127 Anticipated spec changes Open questions about a feature may be a source of future web compat or interop issues. Please list open issues (e.g. links to known github issues in the project for the feature specification) whose resolution may introduce web compat/interop risk (e.g., changing to naming or structure of the API in a non-backward-compatible way). No open questions. Link to entry on the Chrome Platform Statushttps://chromestatus.com/ feature/5157245026566144?gate=5203447331946496 Links to previous Intent discussionsIntent to prototype: https://groups. google.com/a/chromium.org/d/msgid/blink-dev/CAOaYce5MGsXBzw6K_py5yEj_Vx6o_ %3DA4CecJm_gaAyU7H6wfPQ%40mail.gmail.com This intent message was generated by Chrome Platform Status <https://chromestatus.com/>. -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to blink-dev+unsubscr...@chromium.org. To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/a23e5368-82bf-4855-bd81-35dd789341c7n%40chromium.org.
