Rolldown 1.2.4

Rolldown 1.2.4 is here — the Rust-powered bundler behind Vite 8 keeps polishing its edge. Released August 12, 2026, this patch release is all about stability, smarter code-splitting, and proving the WASI story works in real environments.

⚡ Splitting Smarts

Code-splitting gets a widening: namespace extraction now reaches further for already-loaded merges, which means fewer duplicated modules when shared chunks are already in play. The result is leaner output graphs for apps that rely on dynamic imports.

🐛 Bug Bashes

• Android arm64 crash squashed — an illegal instruction crash in the native binding (napi) no longer takes down builds on Android ARM devices
• Negated sideEffects globs fixed — modules are no longer wrongly retained when a sideEffects glob is negated
• Devtools path fix — log paths are now resolved against the build working directory instead of the process cwd

🧪 Test Triumphs

This release flexes the multi-target story hard: a packed @rolldown/browser build was smoke-tested in a real browser page, the full Node test suite now runs against the WASI binding, and packed WASI artifacts were exercised inside a WebContainer. Also upgraded: oxc to 0.144.0 and the napi crates to the latest.

⬆️ Upgrade At Your Pace, But Don't Delay

Rolldown 1.2.4 is a drop-in patch for anyone on 1.2.x — no config changes, no migration drama. If you're already on Vite 8, you're getting this under the hood automatically. Grab it from npm or your package manager of choice.