From 5007edf1a410d70ee5d084b1049f06c81748d3a0 Mon Sep 17 00:00:00 2001
From: Kurtil <gaetan.lagier@hotmail.fr>
Date: Fri, 28 Jan 2022 13:34:21 +0100
Subject: [PATCH 1/3] revert: fix(lib-mode): do not minify lib mode es output

This reverts commit 06d86e4a2e90ca916a43d450bca1e6c28bc4bfe2.
---
 packages/vite/src/node/plugins/esbuild.ts | 8 +-------
 packages/vite/src/node/plugins/terser.ts  | 6 ------
 2 files changed, 1 insertion(+), 13 deletions(-)

diff --git a/packages/vite/src/node/plugins/esbuild.ts b/packages/vite/src/node/plugins/esbuild.ts
index b9e2b74efdca1d..10e6a117634b1a 100644
--- a/packages/vite/src/node/plugins/esbuild.ts
+++ b/packages/vite/src/node/plugins/esbuild.ts
@@ -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
       }
diff --git a/packages/vite/src/node/plugins/terser.ts b/packages/vite/src/node/plugins/terser.ts
index 29f4d5c172ce67..edabeffbcaf478 100644
--- a/packages/vite/src/node/plugins/terser.ts
+++ b/packages/vite/src/node/plugins/terser.ts
@@ -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()
 

From 37db18b429ee6d9d7e259eeede9868703c3a0976 Mon Sep 17 00:00:00 2001
From: Kurtil <gaetan.lagier@hotmail.fr>
Date: Fri, 28 Jan 2022 13:45:56 +0100
Subject: [PATCH 2/3] fix: minify default is false if lib or "esbuild"

---
 packages/vite/src/node/build.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/vite/src/node/build.ts b/packages/vite/src/node/build.ts
index 84ffb93b432f15..92b0adc1c32704 100644
--- a/packages/vite/src/node/build.ts
+++ b/packages/vite/src/node/build.ts
@@ -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,

From c7360f4987bbf755ab8011155848f5cf5f5f93ea Mon Sep 17 00:00:00 2001
From: Kurtil <gaetan.lagier@hotmail.fr>
Date: Fri, 28 Jan 2022 13:50:17 +0100
Subject: [PATCH 3/3] docs(lib-mode): remove build.minify es lib limitation

---
 docs/config/index.md | 2 --
 1 file changed, 2 deletions(-)

diff --git a/docs/config/index.md b/docs/config/index.md
index 233e08b8f864e3..4a7c81c433968e 100644
--- a/docs/config/index.md
+++ b/docs/config/index.md
@@ -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`