From 154408fa8bb9d1c39e49038da163c2be04e5892d Mon Sep 17 00:00:00 2001
From: neverland <chenjiahan@youzan.com>
Date: Sun, 26 Jun 2022 21:52:40 +0800
Subject: [PATCH] perf: remove less source file to remove bundle size (#10752)

* perf: remove css source file to remove bundle size

* docs: update migration guide
---
 packages/vant/docs/markdown/migrate-from-v3.zh-CN.md | 2 ++
 packages/vant/vant.config.mjs                        | 8 ++++++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/packages/vant/docs/markdown/migrate-from-v3.zh-CN.md b/packages/vant/docs/markdown/migrate-from-v3.zh-CN.md
index 774333f88..24e92260d 100644
--- a/packages/vant/docs/markdown/migrate-from-v3.zh-CN.md
+++ b/packages/vant/docs/markdown/migrate-from-v3.zh-CN.md
@@ -112,6 +112,8 @@ emit('clickInput');
 
 目前 Vant 已经支持了基于 CSS 变量的主题定制能力，因此后续将不再提供基于 Less 的主题定制方式。
 
+这意味着 Vant 的 npm 包中将不再会包含 `.less` 样式源文件，只会提供编译后的 `.css` 样式文件。
+
 如果你的项目正在使用旧版的 Less 主题定制，请使用 [ConfigProvider 全局配置](#/zh-CN/config-provider) 组件进行替换。
 
 ### 简化 CSS 变量名
diff --git a/packages/vant/vant.config.mjs b/packages/vant/vant.config.mjs
index 955b34a96..60ec8c542 100644
--- a/packages/vant/vant.config.mjs
+++ b/packages/vant/vant.config.mjs
@@ -6,15 +6,19 @@ export default {
     skipInstall: ['lazyload'],
     packageManager: 'pnpm',
     extensions: {
-      esm: '.mjs'
+      esm: '.mjs',
     },
     site: {
       publicPath:
-        (typeof window === 'undefined' && process.env.PUBLIC_PATH) || '/vant/v4',
+        (typeof window === 'undefined' && process.env.PUBLIC_PATH) ||
+        '/vant/v4',
     },
     vetur: {
       tagPrefix: 'van-',
     },
+    css: {
+      removeSourceFile: true,
+    },
   },
   site: {
     defaultLang: 'en-US',