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fix: Re-enable minifying es lib #6670

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fix: Re-enable minifying es lib #6670

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5007edf
revert: fix(lib-mode): do not minify lib mode es output
Kurtil Jan 28, 2022
37db18b
fix: minify default is false if lib or "esbuild"
Kurtil Jan 28, 2022
c7360f4
docs(lib-mode): remove build.minify es lib limitation
Kurtil Jan 28, 2022
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2 changes: 0 additions & 2 deletions docs/config/index.md
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Expand Up @@ -801,8 +801,6 @@ export default defineConfig({

Set to `false` to disable minification, or specify the minifier to use. The default is [Esbuild](https://github.com/evanw/esbuild) which is 20 ~ 40x faster than terser and only 1 ~ 2% worse compression. [Benchmarks](https://github.com/privatenumber/minification-benchmarks)

Note the `build.minify` option is not available when using the `'es'` format in lib mode.

### build.terserOptions

- **Type:** `TerserOptions`
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2 changes: 1 addition & 1 deletion packages/vite/src/node/build.ts
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Expand Up @@ -251,7 +251,7 @@ export function resolveBuildOptions(
cssTarget: false,
sourcemap: false,
rollupOptions: {},
minify: raw?.ssr ? false : 'esbuild',
minify: raw?.ssr || raw?.lib ? false : 'esbuild',
terserOptions: {},
write: true,
emptyOutDir: null,
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8 changes: 1 addition & 7 deletions packages/vite/src/node/plugins/esbuild.ts
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Expand Up @@ -227,13 +227,7 @@ export const buildEsbuildPlugin = (config: ResolvedConfig): Plugin => {
}

const target = config.build.target
const minify =
config.build.minify === 'esbuild' &&
// Do not minify ES lib output since that would remove pure annotations
// and break tree-shaking
// https://github.com/vuejs/core/issues/2860#issuecomment-926882793
!(config.build.lib && opts.format === 'es')

const minify = config.build.minify === 'esbuild'
if ((!target || target === 'esnext') && !minify) {
return null
}
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6 changes: 0 additions & 6 deletions packages/vite/src/node/plugins/terser.ts
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Expand Up @@ -35,12 +35,6 @@ export function terserPlugin(config: ResolvedConfig): Plugin {
return null
}

// Do not minify ES lib output since that would remove pure annotations
// and break tree-shaking.
if (config.build.lib && outputOptions.format === 'es') {
return null
}

// Lazy load worker.
worker ||= makeWorker()

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