diff --git a/2019/12/webpack原理.md b/2019/12/webpack原理.md
index e6bb99e..e58ad39 100644
--- a/2019/12/webpack原理.md
+++ b/2019/12/webpack原理.md
@@ -104,4 +104,5 @@ moudle.export={
 #webpack原理2
 
 1.webpack功能：
-（1） 代码转换  
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+（1） 代码转换  typescript编译成js  sass,less,scss 编译成css
+(2) 文件优化  引入的图片，js
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