Add compiler=js escape hatch to revert to dart2js compilation #9406
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elliette merged 3 commits intoflutter:masterfrom Aug 21, 2025
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Add compiler=js escape hatch to revert to dart2js compilation #9406elliette merged 3 commits intoflutter:masterfrom
compiler=js escape hatch to revert to dart2js compilation #9406elliette merged 3 commits intoflutter:masterfrom
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srawlins
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mdebbar
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The change looks good to me.
As far as testing goes, ideally, you would load the app in an iframe with the ?compiler=js in the URL. Then you would poke into the HTML content of the iframe to make sure the attribute on the body is set to flt-renderer="canvaskit". But I'm not sure how to do a test like this in Dart/Flutter.
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Addresses #9398
Adds an "escape hatch" that allows a user to force the dart2js-compiled DevTools even when the dart2wasm-compiled DevTools fails to load (see for example #9118). This "escape hatch" is adding the query parameter
compiler=jsand forcing a reload.FYI @mdebbar - I'm trying to figure out a good way to test this (not sure if
integration_testcould be made to work, or ifpackage:webdriveris better, or...?) See #9405. Would love to hear your thoughts if you have any suggestions. Thanks!