diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..1377554ebea6f98a2c748183bc5a96852af12ac2
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*.swp
diff --git "a/6 NJS\346\225\260\346\215\256\351\235\242\347\274\226\347\250\213/README.md" "b/6 NJS\346\225\260\346\215\256\351\235\242\347\274\226\347\250\213/README.md"
new file mode 100644
index 0000000000000000000000000000000000000000..80e8f65c4274a2a06171e19cbe3a0ff75e0ea700
--- /dev/null
+++ "b/6 NJS\346\225\260\346\215\256\351\235\242\347\274\226\347\250\213/README.md"	
@@ -0,0 +1,67 @@
+# Lab环境介绍
+
+本次实验需要安装NGINX JavaScript模块，建议使用官方预构建包：
+
+~~~shell
+cat << EOF > /etc/yum.repos.d/nginx.repo
+[nginx]
+name=nginx repo
+baseurl=https://nginx.org/packages/mainline/centos/7/\$basearch/
+gpgcheck=0
+enabled=1
+EOF
+
+yum update -y
+
+yum install nginx -y
+~~~
+
+或者官方镜像:
+
+~~~docker
+docker pull nginx:alpine
+~~~
+
+## 配置文件
+
+参考`nginx.conf`，编辑NGINX的主配置文件，加载njs模块：
+
+~~~conf
+# njs dynamic module
+load_module modules/ngx_http_js_module.so;
+~~~
+
+拷贝`default.conf`到NGINX的安装目录`/etc/nginx/conf.d/`下，注意其中的`js_import`指令，指定读取的是`/app/`里的js脚本:
+
+~~~conf
+js_import /app/content.js;
+~~~
+
+
+## NJS脚本
+
+拷贝`content.js`脚本文件到`/app/`目录下。
+
+其中有3个JavaScript函数：`say_hello, header_filter, body_filter`。
+
+
+## 测试验证
+
+测试NGINX配置是否正确，再启动NGINX：
+
+~~~shell
+nginx -t
+nginx
+~~~
+
+运行`curl`命令，测试JavaScript函数的执行效果:
+
+~~~shell
+# 头字段test: xxx，响应字符串是各种变量拼成的
+curl 127.1 -v -H 'test: 1'
+
+# 多了一个头njs，body全大写，又添加了尾部字符串
+curl 127.1/filter -v
+~~~
+
+接下来可修改`content.js`里的JavaScript代码，重启NGINX，再观察curl的输出结果。
diff --git "a/6 NJS\346\225\260\346\215\256\351\235\242\347\274\226\347\250\213/content.js" "b/6 NJS\346\225\260\346\215\256\351\235\242\347\274\226\347\250\213/content.js"
new file mode 100644
index 0000000000000000000000000000000000000000..5ebe8ebc5d384084a2101b3468301abe0a220405
--- /dev/null
+++ "b/6 NJS\346\225\260\346\215\256\351\235\242\347\274\226\347\250\213/content.js"	
@@ -0,0 +1,40 @@
+// chrono @ 2021-09
+
+export default { say_hello, header_filter, body_filter }
+
+function say_hello(r)
+{
+  let str = 'hello ' +
+            r.variables['hostname'] + ' ' +
+            r.variables['scheme'] + '://' +
+            r.variables['host'] + ' ' +
+            r.variables['request_uri'] + '\n'
+
+  if (r.headersIn['test'] == '1') {
+    r.headersOut['test'] = 'xxx'
+  }
+
+  r.return(200, str)
+}
+
+let trailer = '<added>\n'
+
+function header_filter(r)
+{
+    r.headersOut['njs'] = njs.version
+
+    r.headersOut['Content-Length'] =
+      parseInt(r.headersOut['Content-Length']) + trailer.length
+}
+
+function body_filter(r, data, flags)
+{
+   data = data.toUpperCase()
+
+  if (flags.last) {
+    data = data + trailer
+  }
+
+  r.sendBuffer(data, flags);
+}
+
diff --git "a/6 NJS\346\225\260\346\215\256\351\235\242\347\274\226\347\250\213/default.conf" "b/6 NJS\346\225\260\346\215\256\351\235\242\347\274\226\347\250\213/default.conf"
new file mode 100644
index 0000000000000000000000000000000000000000..fd43ea73f0f12b569d12466fe899c69150ec377e
--- /dev/null
+++ "b/6 NJS\346\225\260\346\215\256\351\235\242\347\274\226\347\250\213/default.conf"	
@@ -0,0 +1,27 @@
+# chrono 2021-09
+#
+
+#load_module modules/ngx_http_js_module.so;
+js_import /app/content.js;
+
+server {
+
+  default_type  text/html;
+
+  #listen       80 ;
+  #server_name  localhost;
+
+  # curl 127.1 -v -H 'test: 1'
+  location / {
+    js_content content.say_hello;
+  }
+
+  # curl 127.1/filter -v
+  location /filter {
+    js_header_filter content.header_filter;
+    js_body_filter content.body_filter;
+
+    return 200 'test njs filter\n';
+  }
+
+}
diff --git "a/6 NJS\346\225\260\346\215\256\351\235\242\347\274\226\347\250\213/nginx.conf" "b/6 NJS\346\225\260\346\215\256\351\235\242\347\274\226\347\250\213/nginx.conf"
new file mode 100644
index 0000000000000000000000000000000000000000..e574ccf9c93172e2a468d21724d08b374ffe63e7
--- /dev/null
+++ "b/6 NJS\346\225\260\346\215\256\351\235\242\347\274\226\347\250\213/nginx.conf"	
@@ -0,0 +1,34 @@
+
+user  nginx;
+worker_processes  auto;
+
+error_log  /var/log/nginx/error.log notice;
+pid        /var/run/nginx.pid;
+
+# njs dynamic module
+load_module modules/ngx_http_js_module.so;
+
+events {
+    worker_connections  1024;
+}
+
+
+http {
+    include       /etc/nginx/mime.types;
+    default_type  application/octet-stream;
+
+    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
+                      '$status $body_bytes_sent "$http_referer" '
+                      '"$http_user_agent" "$http_x_forwarded_for"';
+
+    access_log  /var/log/nginx/access.log  main;
+
+    sendfile        on;
+    #tcp_nopush     on;
+
+    keepalive_timeout  65;
+
+    #gzip  on;
+
+    include /etc/nginx/conf.d/*.conf;
+}