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Tag: flutter-web

6 posts

2026-09-26 errors flutter flutter-web

Fix: Flutter debugger jumps into binding.dart on hot reload with no error shown

A dwds bug in Flutter 3.35 web sent a fake pause on every hot reload. Upgrade to Flutter 3.38+, or switch VS Code back to 'Debug my code' so package frames are skipped.

2026-09-17 comparison flutter flutter-web

CanvasKit vs skwasm for Flutter web in 2026: which renderer should you ship?

Ship skwasm with flutter build web --wasm when your dependencies compile to Wasm: it downloads less and rendered 36% more frames than CanvasKit on a heavy scene. On Flutter 3.47.x, keep it single-threaded until the multi-threaded text crash fix leaves beta.

2026-09-11 errors flutter flutter-web

Fix: Flutter Text renders off-screen in an Android WebView when system font scaling is enabled

Flutter web 3.41 to 3.44 reports a ~625x line-height override when an Android WebView's textZoom is not 100. Upgrade to 3.47, or clear the override in MaterialApp.builder.

2026-09-11 flutter flutter-web deployment

Fix: Flutter web serves a stale cached build after reloading the browser tab

A reload only revalidates index.html, so an unhashed main.dart.js keeps coming from the browser cache. Send Cache-Control: no-cache for the Flutter build output, stamp a build id where you cannot set headers, and let the self-cleaning service worker retire pre-3.41 caches.

2026-09-03 migration flutter dart

Migrate a Flutter web app from dart:html to package:web and dart:js_interop

A step-by-step migration off the deprecated dart:html, dart:js_util, and package:js onto package:web 1.1.1 and dart:js_interop: how to find every offending import with the dart2wasm compiler, what dart fix does and does not rename, the JSImmutableListWrapper and innerHTML traps, and how to verify with flutter build web --wasm.

2026-07-28 flutter dart webassembly

How to build a Flutter web app with WebAssembly using flutter build web --wasm

A complete guide to shipping a Flutter web app compiled to WebAssembly on Flutter 3.44: what the two emitted builds look like, why Firefox and Safari still get JavaScript because of the loader's wasmAllowList, migrating off dart:html for dart2wasm, the COOP/COEP headers that decide whether skwasm runs multi-threaded, and how to prove at runtime which build the browser actually loaded.