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feat: enable tree-shaking for lib es #8737

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merged 1 commit into from Jun 23, 2022
Merged

feat: enable tree-shaking for lib es #8737

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12 changes: 5 additions & 7 deletions packages/vite/src/node/plugins/esbuild.ts
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Expand Up @@ -237,12 +237,7 @@ 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
Expand All @@ -253,7 +248,10 @@ export const buildEsbuildPlugin = (config: ResolvedConfig): Plugin => {
target: target || undefined,
...(minify
? {
minify,
// 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
minify: !(config.build.lib && opts.format === 'es'),
treeShaking: true,
format: rollupToEsbuildFormatMap[opts.format]
}
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