From 3b94e3974a412d0ce49b7fb61eddc10a4c169ff1 Mon Sep 17 00:00:00 2001
From: asd <374367073@qq.com>
Date: Sat, 7 Dec 2019 19:15:34 +0800
Subject: [PATCH] update

---
 2019/用node写爬虫.md | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/2019/用node写爬虫.md b/2019/用node写爬虫.md
index 37f34d5..de78d29 100644
--- a/2019/用node写爬虫.md
+++ b/2019/用node写爬虫.md
@@ -17,13 +17,19 @@ yarn global(是否全局) add koa koa-router superagent cheerio
 通过import 引入
 
 2.获取网页内容：
+
+```
 	
 superagent.get(''<网址>).end((err,res)=>{
     //其中res.text 就是获取的网站内容的源代码
 })
 
+```
+
 3.使用cheerio 通过jq分析数据
 
 let $=cheerio.load(res.text)
 
-eg: 获取
\ No newline at end of file
+eg: 获取所有class="button" 的a标签
+
+let btn=$()
\ No newline at end of file