Don't transpile spread in JSX with modern targets #6274
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mischnic
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devongovett,
wbinnssmith,
DeMoorJasper and
joeyslater
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wbinnssmith
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May 12, 2021
Benchmark ResultsKitchen Sink 🚨
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Cold BundlesNo bundles found, this is probably a failed build... Cached BundlesNo bundles found, this is probably a failed build... React HackerNews 🚨
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Cold BundlesNo bundles found, this is probably a failed build... Cached BundlesNo bundles found, this is probably a failed build... AtlasKit Editor 🚨
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Cold BundlesNo bundles found, this is probably a failed build... Cached BundlesNo bundles found, this is probably a failed build... Three.js 🚨
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Cold BundlesNo bundles found, this is probably a failed build... Cached BundlesNo bundles found, this is probably a failed build... |
devongovett
approved these changes
May 13, 2021
lettertwo
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Jun 4, 2021
…raph * bdo/buffer-backed-graph: (37 commits) Improve resolver performance (#6328) v2.0.0-beta.3.1 Add it to the nightly release workflow as well Configure jemalloc page size for M1 (#6314) Update swc (#6307) Fix parcelDependencies v2.0.0-beta.3 Update swc (#6289) Remove old AdjacencyList, serialize EfficientGraph in Graph, update BundleGraph to use new functions Babel ast location, diagnostic, and source location remapping (#6238) update contributing guide (#6293) Update sourcemap to rc-1.0 (#6279) Serve nearest index.html in case the applications has multiple index files (#6250) Allow bundling browserify bundles by replacing free requires with undefined (#6260) Upgrade flow to 0.151.0 (#6281) Use local require for `@babel/core` and `postcss` (#6264) Resolve helpers relative to JS transformer (#6278) Pure comment for $parcel$interopDefault (#6271) Don't transpile spread in JSX with modern targets (#6274) Update TS validator assertions (#6272) ...
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Previously, the swc react transformer unconditionally transpiled spread in JSX (see below) away and called out to
@swc/helpers.Now, the react transformer leaves the object spread as it is and leaves the downleveling to preset-env which runs afterwards (and also respects the browserslist config).
💻 Examples