*> Web developers: No signals* Is there any sign of developer interest we can point to here?
*> Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?* *> No* I'd expect this to be shipping everywhere -- should this say "yes"? -- Dan On Monday, September 14, 2026 at 9:18:46 AM UTC-7 Caio Lima wrote: > *Contact emails* > [email protected], [email protected] > > *Explainer* > https://github.com/tc39/proposal-defer-import-eval > > *Specification* > https://tc39.es/proposal-defer-import-eval > > *Summary* > `import defer` allows lazily evaluating ES modules, to reduce the startup > impact of modules that are not actually needed for the first JavaScript > execution. This provides an easier-to-use alternative to dynamic import. > While dynamic import provides more benefits, as it allows deferring loading > of modules rather than just evaluation, it has a lot of friction due to its > asynchronous nature, and thus it's not always usable. The `import defer` > TC39 proposal follows the same syntax as `import source`, but it only works > with namespace imports: ``` import defer * as namespace from > "./some-module.js" ``` The module will be synchronously executed on > property access on the module namespace object. To allow synchronous > execution, not all of `./some-module.js`'s dependency tree will be > deferred. Modules that contain top-level await will be eagerly executed, > leaving only the synchronous parts of the tree for later. > > *Blink component* > Blink>JavaScript > <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EJavaScript%22> > > *Web Feature ID* > import-defer <https://webstatus.dev/features/import-defer> > > *Motivation* > *No information provided* > > *Initial public proposal* > *No information provided* > > *TAG review* > *No information provided* > > *TAG review status* > Not applicable > > *Goals for experimentation* > None > > *Risks* > > > *Interoperability and Compatibility* > *No information provided* > > *Gecko*: Positive (https://bugzilla.mozilla.org/show_bug.cgi?id=1952263) > Mozilla > was originally championing the proposal > > *WebKit*: Shipped/Shipping (https://bugs.webkit.org/show_bug.cgi?id=320867 > ) > > *Web developers*: No signals > > *Other signals*: > > *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? > *No information provided* > > > *Debuggability* > > Changes were added to CDP to properly support feature UX (for detailed > information, see https://issues.chromium.org/issues/552666773) > > *Will this feature be supported on all six Blink platforms (Windows, Mac, > Linux, ChromeOS, Android, and Android WebView)?* > No > > *Is this feature fully tested by web-platform-tests > <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?* > Yes > Test262 tests: - > https://github.com/tc39/test262/tree/main/test/language/import/import-defer > - > https://github.com/tc39/test262/tree/main/test/language/expressions/dynamic-import/import-defer > > *Flag name on about://flags* > *No information provided* > > *Finch feature name* > V8Flag_js_defer_import_eval > > *Rollout plan* > Will ship enabled for all users > > *Requires code in //chrome?* > False > > *Tracking bug* > https://issues.chromium.org/issues/398218423 > > *Estimated milestones* > Shipping on desktop 155 > Shipping on Android 155 > Shipping on WebView 155 > > *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 information provided* > > *Link to entry on the Chrome Platform Status* > https://chromestatus.com/feature/5071131271888896?gate=6546259918848000 > > 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 [email protected]. To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/f82d2ad5-f33c-4f08-a3b7-a414eaba3cbfn%40chromium.org.
