From 60fa6ba082c50d57ec4abecb196573f4100636d2 Mon Sep 17 00:00:00 2001
From: Bjorn Lu <bjornlu.dev@gmail.com>
Date: Thu, 14 Jul 2022 16:41:54 +0800
Subject: [PATCH] docs: update library mode info (#9102)

---
 docs/guide/build.md | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/docs/guide/build.md b/docs/guide/build.md
index a6bd0a5106587a..5fe3c2a78e25f8 100644
--- a/docs/guide/build.md
+++ b/docs/guide/build.md
@@ -163,8 +163,8 @@ Running `vite build` with this config uses a Rollup preset that is oriented towa
 ```
 $ vite build
 building for production...
-[write] my-lib.mjs 0.08kb, brotli: 0.07kb
-[write] my-lib.umd.js 0.30kb, brotli: 0.16kb
+dist/my-lib.js      0.08 KiB / gzip: 0.07 KiB
+dist/my-lib.umd.cjs 0.30 KiB / gzip: 0.16 KiB
 ```
 
 Recommended `package.json` for your lib:
@@ -172,18 +172,23 @@ Recommended `package.json` for your lib:
 ```json
 {
   "name": "my-lib",
+  "type": "module",
   "files": ["dist"],
-  "main": "./dist/my-lib.umd.js",
-  "module": "./dist/my-lib.mjs",
+  "main": "./dist/my-lib.umd.cjs",
+  "module": "./dist/my-lib.js",
   "exports": {
     ".": {
-      "import": "./dist/my-lib.mjs",
-      "require": "./dist/my-lib.umd.js"
+      "import": "./dist/my-lib.js",
+      "require": "./dist/my-lib.umd.cjs"
     }
   }
 }
 ```
 
+::: tip Note
+If the `package.json` does not contain `"type": "module"`, Vite will generate different file extensions for Node.js compatibility. `.js` will become `.mjs` and `.cjs` will become `.js`.
+:::
+
 ## Advanced Base Options
 
 ::: warning